Rolls-Royce Archives
| Identifier | Entry | ||
| Scan001 | The performance of Champion sparking plugs types AE.4, AE.9, and AE.1. | ||
| View original record | REPORT ON CHAMPION SPARKING PLUGS TYPES : AE.4., AE.9., AE.1. TYPE AE.4. These plugs were tried in a 7/1 compression 'F' engine running on 20/80 Benzol/Aviation, Lodge A-30 and KLG.541 plugs being… | ||
| Scan002 | Letter to Champion Sparking Plug Co. Ltd. regarding the return and testing of various spark plugs. | ||
| View original record | C O P Y. ROY/GEA14/EB13428. 13th April 1928. Messrs.The Champion Sparking Plug Co.Ltd., 83, Pall Mall, LONDON. S.W.1. Dear Sirs, We thank you for your letter of the 11th instant, referring to the A.E… | ||
| Scan003 | Follow-up letter regarding Giomme's sparkling plugs from the W.B. Kahn Company Ltd. | ||
| View original record | Hs. ✓ c Wor. X81-b- Py3/Av/R. 6. 1. 1930. re GIOMME'S SPARKLING PLUGS. With our Py8/Av/R.13.11.29, we sent you some papers and plugs relating to the Giomme sparking Plugs, which we had received from… | ||
| Scan004 | The test results of Igna-Segrave sparking plugs on a 20 HP engine. | ||
| View original record | 81812a. To RCY. From Hs/ACL. Hs/ACL.1/MJ.9.1.30. IGNA SPARKING PLUGS - SEGRAVE TYPE. We have carried out some tests on the test bed with the Igna-Segrave sparking plugs on one of our 20 HP. engines… | ||
| Scan005 | Follow-up letter requesting the return of Giomme's sparking plugs. | ||
| View original record | Hs. o. Wor. re GIOMME'S SPARKING PLUGS. We wrote you on the 6th January, Py3/Av/R.6.1.30 asking if you would be good enough to return the above plugs sent to us by Messrs. W. B. Kahn Company Ltd., of… | ||
| Scan006 | Giomme's Sparking Plugs and correspondence with W. B. Kahn Co., Ltd. | ||
| View original record | X18R l. Py6/Av/JL.14.2.30. Hs. Copy to Wor. Re: Giomme's Sparking Plugs. ---------------------------- We wrote you on the 6th January and also on the 23rd January regarding some plugs sent to us by W.… | ||
| Scan007 | Letter from W. B. Kahn Company Ltd. chasing up a report on Giomme's Sparking Plugs. | ||
| View original record | TELEPHONE: HOLBORN 5061. TELEGRAPHIC ADDRESS:- "WILKAHN, LONDON". ALL CODES. HEAD OFFICE: W.B.KAHN COMPANY INC. 342, MADISON AVENUE, NEW YORK. W. B. KAHN COMPANY LTD., INTERNATIONAL PATENT BROKERS.… | ||
| Scan008 | Failure and subsequent disposal of Ciomme's Sparking Plugs. | ||
| View original record | X1812.b. Py. From Hs. C. to Wor. Hs.1/MJ.15.2.30. Replying to Py6/AV/JL.14.2.30. Re. Ciomme's Sparking Plugs. We tried these sparking plugs and they were hopeless. Unfortunately they were afterwards… | ||
| Scan009 | Letter from Lissen Limited proposing a test of their new aviation spark plugs, as suggested by the Air Ministry. | ||
| View original record | X1812.a1 TELEGRAMS, INLAND: "LISSENIUM, PHONE, LONDON." TELEGRAMS, FOREIGN: "LISSENIUM, LONDON." CONTRACTORS TO H.M. & COLONIAL GOVERNMENTS TELEPHONES: HOUNSLOW 2361 (12 LINES) (PRIVATE BRANCH… | ||
| Scan010 | Continuation sheet from Lissen Limited regarding aircraft plugs with steel bodies. | ||
| View original record | LISSEN LIMITED. - Hives Esq., Messrs. Rolls Royce. 29th August 1930. CONTINUATION SHEET No. 1. very pleased to let you have some along if you will let us know how many you want and for what engine.… | ||
| Scan011 | Letter regarding the forwarding of six B.S.2. type sparking plugs received from Messrs. Lissen and their previous tests. | ||
| View original record | X1812a. Py/Blbl/Av/JL.5.9.30. Hs. Copy to Wor. We are sending you under separate cover six B.S.2. type sparking plugs which we have received from Messrs. Lissen, from whom we have also received a… | ||
| Scan012 | Letter from Lissen Limited to Colonel Fell regarding a new type of sparking plug for aircraft engines. | ||
| View original record | COPY. LISSEN, LIMITED, Lissenium Works, Worple Road, Isleworth, Middlesex. Ref:SEB/VO. 1st September, 1930. Colonel Fell, Messrs. Rolls-Royce, Ltd., 14, Conduit Street, LONDON, W.1 Dear Sir, Your name… | ||
| Scan013 | Follow-up letter from Lissen Limited regarding the testing of aircraft sparking plugs. | ||
| View original record | X1815a. TELEGRAMS, INLAND: "LISSENIUM, PHONE, LONDON." TELEGRAMS, FOREIGN: "LISSENIUM, LONDON." MANUFACTURERS OF: RADIO COMPONENT PARTS. COMPLETE RECEIVING SETS. H.T. BATTERIES & DRY CELLS.… | ||
| Scan014 | Letter from Lissen Limited requesting a performance report on aircraft sparking plugs sent for testing. | ||
| View original record | 61812a. TELEGRAMS, INLAND: "LISSENIUM, PHONE, LONDON." TELEGRAMS, FOREIGN: "LISSENIUM, LONDON." MANUFACTURERS OF: RADIO COMPONENT PARTS, COMPLETE RECEIVING SETS, H.T. BATTERIES & DRY CELLS,… | ||
| Scan015 | Article discussing spark plug problems, their relation to heat characteristics, and diagnosing engine conditions. | ||
| View original record | Spark Plug Problems The Relation of Heat Characteristics to Operating Conditions By HECTOR RABEZZANA Chief Spark Plug Development Engineer, A. C. Spark Plug Co. Fig. 1 (Diagram labels: BURETTE,… | ||
| Scan016 | Detailed explanation of spark plug operation, heat range, and fouling characteristics. | ||
| View original record | Fig. 4 Of the various characteristics of the ignition spark, its appearance, that is, its fatness, color, etc., does not determine its ignition value. It is not possible to add to the power of an… | ||
| Scan017 | Supplement to a report on detonation, discussing the challenges of obtaining consistent H.U.C.R. values due to fuel deposits. | ||
| View original record | B.Tr seen Ry. 86000 Supplement to A.M.L. Report No. 108A, March, 1931. Air Ministry Laboratory Imperial College of Science, S.W.7. Detonation, Spark Plug Position and Engine Speed. S U P P L E M E N… | ||
| Scan018 | Letter regarding a new Mica Sparking Plug for aero engines and its performance. | ||
| View original record | YNG (handwritten, circled) 81802 (handwritten) London Address; Royal Aero Club, 119, Piccadilly, LONDON, W.1. 24, Rue du Belvedere Parc des Princes Boulogne-sur-Seine 1st, December, 1931. (Handwritten… | ||
| Scan019 | Letter to A.J. Rowledge regarding a spark plug designed by Mr. Roy Hurley and plans for its manufacture in England. | ||
| View original record | A. J. Rowledge Esq. 1st, December, 1931. 2. The Plug was designed by Mr. Roy Hurley, for nine years Chief Engineer of the B.G. Sparking Plug Co. (the only manufacturers of Mica Sparking Plugs in the… | ||
| Scan020 | Letter from Captain Cyril Turner regarding a proposition for a new type of mica sparking plug. | ||
| View original record | YNG 81812aG 10 DEC 1931 CAPTAIN CYRIL TURNER, A.F.C. 24, Rue du Belvédère Parc des Princes BOULOGNE-SUR-SEINE TELEPHONE: Molitor 06-55 CABLES: Cyturn Boulognesurseine 7th. December, 1931. A.J.… | ||
| Scan021 | Construction and drawbacks of existing mica sparking plugs and proposing an improved H-T plug design. | ||
| View original record | - 2 - A.J. Rowledge, Esq., (contd) 7th. December, 1931. sparking plug and mica plugs of other manufacture, I will ask you to be good enough to consider the following. In all existing mica sparking… | ||
| Scan022 | Letter detailing the features and ongoing tests of a new H-T sparking plug design. | ||
| View original record | - 3 - A.J. Rowledge, Esq., (contd) 7th. December, 1931. conductivity of copper, can use a center electrode - without welds - of the highest type of special non-burning alloy, which in turn means that… | ||
| Scan023 | Letter detailing single-cylinder and endurance test results for sparking plugs and their use by other engine manufacturers. | ||
| View original record | - 4 - A.J. Rowledge, Esq., (contd) 7th. December, 1931. 'The single cylinder tests shewed the heat resistance of the plugs to be high, it being possible to carry 128 Lbs/sq. in. BMEP at 2000 RPM,… | ||
| Scan024 | Running time and test parameters for H.T.312 plugs on F.25 and F.607 engine test schedules. | ||
| View original record | RUNNING TIME OF H.T.312 PLUGS! Y 181va 19-1-32 In F.25. 4.30 mins. In F.607. 7.25 mins. 11.55 mins. F.25. Constant Speed.Varying Boost Power Curves. 2000 RPM. 350-500 HP. 2 hrs. Endurance Running at… | ||
| Scan025 | Letter from Captain Cyril Turner concerning Hurley-Townsend Sparking Plugs, requesting a test report and engine specifications. | ||
| View original record | 8181-a CAPTAIN CYRIL TURNER, A.F.C. 24, Rue du Belvédère Parc des Princes BOULOGNE-SUR-SEINE TELEPHONE: Molitor 06-35 CABLES: Cyturn Boulognesurseine 2nd. February, 1932. - Hives, Esq., Messrs. Rolls… | ||
| Scan026 | From Captain Cyril Turner with requests for tests and engine data. | ||
| View original record | CAPTAIN CYRIL TURNER, A.F.C. 24, Rue du Belvédère Parc des Princes BOULOGNE-SUR-SEINE TELEPHONE: Molitor 06-55 CABLES: Cyturn Boulognesurseine Shall be in London until January 27th Address. Royal Aero… | ||
| Scan027 | Test report on B.G. Spark Plugs, type 116, for the Kestrel engine. | ||
| View original record | 81812a. x2965 Rg. From Hs/Yag. c. to WOP. Ry. c. to Pl. Lr. c. to XP. Hs/Yag.4/MA. 23. 2. 32. B.G. SPARK PLUGS. - TYPE 116. The above plugs have been tried out by us as they are the type of plug which… | ||
| Scan028 | Results of engine tests on spark plugs, focusing on fouling, gap erosion, and overall condition. | ||
| View original record | -2- Results. After the first 3 hours of the 4 power test the plugs were removed from the engine due to fouling. They had then completed the following running. 1 Hour - Power Curves etc. 1 Hour - 2500… | ||
| Scan029 | Three photographic views of a B.G. Paris spark plug. | ||
| View original record | B.G PARIS 116 | ||
| Scan030 | The testing of Hurley-Townsend sparking plugs, type 312. | ||
| View original record | Rg. from Hs/Yng. c. BY. 81812,a Hs/Yng.1/AD24.2.32. HURLEY-TOWNSEND SPARKING PLUGS TYPE 312. X2965. Sparking plugs of the above type have recently been submitted for test purposes. They are… | ||
| Scan031 | Letter to Capt. Cyril Turner regarding tests on Hurley-Townsend Spark Plugs and the service life of existing plugs. | ||
| View original record | 818/1a Expl. Dept. Hs/Yng.6/MJ. April 13th.1932. Capt. Cyril Turner A.F.C., 24, Rue de Belvedere, Parc des Princes, Boulogne-sur-Seine. Re. Hurley-Townsend Spark Plugs. Dear Sir, We have carried out… | ||
| Scan032 | Table of service engine particulars relevant to spark plugs. | ||
| View original record | PARTICULARS OF R.R. SERVICE ENGINE RELEVANT TO SPARK PLUGS. ENGINE. C.R. NML.SPEED. ¹BMEP. AT RATED POWER. ALT. AT RATED POWER. APPROVED PLUGS. REACH OF PLUG. Kestrel 1 A. 6/1. 2250 133 3000 ft. Lodge… | ||
| Scan033 | The features and test results of Hurley-Townsend Type 312 sparking plugs. | ||
| View original record | Copy. Rg. From Hs/Yng. c. to By. HS/Yng.1/AD24.2.32. HURLEY-TOWNSEND SPARKING PLUGS TYPE 312. Sparking plugs of the above type have recently been submitted for test purposes. They are manufactured by… | ||
| Scan034 | Blueprint detailing scrap sections through the sparking plug bosses for Kestrel and Buzzard engines. | ||
| View original record | No 2 CYL No 1 CYL .750" .625" SCRAP SECTION THRO' SPARKING PLUG BOSSES. SHADED PORTION REPRESENTS PLUG ADAPTOR. KESTREL ENGINES No 2 CYL No 1 CYL .775" .625" BUZZARD ENGINES ROLLS-ROYCE, LTD. PRINT… | ||
| Scan035 | Letter to Capt. Cyril Turner regarding tests on Hurley-Townsend Spark Plugs. | ||
| View original record | 86000 Expl. Dept. Hs/Yng.6/MJ. April 13th.1932. Capt. Cyril Turner A.F.C., 24, Rue de Belvedere, Parc des Princes, Boulogne-sur-Seine. Re. Hurley-Townsend Spark Plugs. Dear Sir, We have carried out… | ||
| Scan036 | Table of specifications for Kestrel and Buzzard engines relevant to spark plugs. | ||
| View original record | PARTICULARS OF R.R. SERVICE ENGINE RELEVANT TO SPARK PLUGS. ENGINE. C.R. NML.SPEED. BMEP. AT RATED POWER. ALT. AT RATED POWER. APPROVED PLUGS. REACH OF PLUG. Kestrel 1 A. 6/1. 2250 133 3000 ft. Lodge… | ||
| Scan037 | Blueprint detailing cross-sections of cylinder blocks for Kestrel and Buzzard engines. | ||
| View original record | [ "No 2 CYL", "No 1 CYL", ".750"", ".625"", "SCRAP SECTION THRO'", "SPARKING PLUG BOSSES", "SHADED PORTION REPRESENTS PLUG ADAPTOR", "KESTREL ENGINES", ".775"", "BUZZARD ENGINES", "ROLLS-ROYCE, LTD.",… | ||
| Scan038 | Letter from Captain Cyril Turner regarding the testing and potential UK manufacture of Hurley-Townsend spark plugs. | ||
| View original record | YNG See me 8181/a. CAPTAIN CYRIL TURNER, A.F.C. 24 Rue du Belvedere Parc des Princes BOULOGNE SUR SEINE TELEPHONE: Molitor 06-55, Auteuil 69-54. NEW ADDRESS. 59, Boulevard Murat, PARIS. 16é. CABLES:… | ||
| Scan039 | Letter to Capt. Cyril Turner opposing the suggestion of running a Type Test engine on H.T. spark plugs. | ||
| View original record | 81812.a. HS/Yng.8/MA. April 22nd, 1932. Capt. Cyril Turner, A.F.C. 59, Boulevard Murat, PARIS. Dear Sir, Re. Hurley-Townsend Spark Plugs. Replying to your letter dated 16.4.32. We wish you to… | ||
| Scan040 | Proposing the use of K.L.G. aero plugs alongside Lodge plugs to avoid a monopoly. | ||
| View original record | To Hs. from ROY c. to RG c. to BY RECEIVED 12 MAY 86-000. ROY9/MG11.5.32 Aero Plugs Under existing arrangements we fit Lodge Plugs, and Lodge Plugs exclusively, to our various Aero Engines. The… | ||
| Scan041 | Letter from the Air Ministry granting provisional airworthiness approval for K.L.G. Sparking Plugs, Type V.9. | ||
| View original record | COPY Ref: 165463/32/RDE3. Air Ministry London W.C.2 15th February, 1932 K.L.G. Sparking Plugs, Type V.9 Gentlemen, I am directed to inform you that a satisfactory report has been received as the… | ||
| Scan042 | Test report on B.G. radio screened spark plugs for the Kestrel engine. | ||
| View original record | X1812a. X2965 Rg. From Hs/Yag. c. to Wor. c. to Hy. c. to EP. c. to Lp. c. to Fl. Hs/Yag.4/MA.1.7.32. B.G. SPARK PLUGS - RADIO SCREENED TYPES. ON the homologation tests of the Kestrel engine in… | ||
| Scan043 | Conclusion of a test on spark plug erosion and insulation breakdown. | ||
| View original record | -2- HS/Yng.4/Ma.1.7.32.Cont'd. On checking over the spark gaps after the test it was found that no measurable erosion had taken place. Finally our standard electrical tests for insulation breakdown… | ||
| Scan044 | Photograph of an assembled and disassembled spark plug elbow connector. | ||
| View original record | LODGE | ||
| Scan045 | The testing and performance of 14mm spark plugs in various vehicles. | ||
| View original record | To R. From Hs/Wm. c. SE. WOT. c. RE. E. c. Da. EV. HdV. 81812,l. Hs/Wm.1/ADR.7.32. 14 MM. SPARKING PLUGS For some time past 12 mm. and 14 mm. plugs have been used on light aircraft engines and on… | ||
| Scan046 | Photographic print showing a top-down view of seven spark plugs in a row. | ||
| View original record | Top 1 | ||
| Scan047 | Photograph displaying seven different models of Lodge spark plugs. | ||
| View original record | [ "H14 LODGE 5", "R.298 LODGE", "HD14 LODGE 3", "LKS6", "LKS6", "LKS5", "LKS5" ], | ||
| Scan048 | Advantages of using 14 MM sparking plugs over the standard 18 MM plugs. | ||
| View original record | 81812h To R. from E. E.1/HP.4.7.32. C. Sr. Wor. Hs. By. FD. 14 MM. Sparking Plugs. The use of 14 MM. sparking plugs on any of our engines would enable us to improve the water cooling of the head, and… | ||
| Scan049 | Series of tests to determine the optimal sparking plug gap to overcome engine misfiring. | ||
| View original record | X1812 C. To Hs. from G.H. Whyman. c. to Rn. Ltd. 22.6.32. We have now completed a series of tests to determine at what gap we can set our sparking plugs on the magneto side to overcome misfiring.… | ||
| Scan050 | Letter to La Bougie B.G. regarding the testing of their sparkling plugs on a Kestrel engine. | ||
| View original record | c. Hs. Rg.8/DM. July 15th, 1932. La Bougie B.G., 11, Rue Vergniaud, Paris, (13e), France. Dear Sirs, We are in receipt of your letter of July 7th with regard to the use of your sparking plugs on our… | ||
| Scan051 | New Siemens sparking plugs made of aluminium oxide and their suitability for car engines. | ||
| View original record | S/W. PER BAG. 81812.a F2/JL.9.12.32. To Hs. from F. Copy to Wor. Please see the attached leaflets relating to Siemens Sparking Plugs. During my time in Germany I visited the Siemens factory in… | ||
| Scan052 | Declining interest in Siemens sparking plugs in favour of the British made ones currently in use. | ||
| View original record | V1812.a To F. From Hs. c. to Wor. Hs.12/MJ.12.12.32. Re. Siemens Sparking Plugs. Replying to F.2/JL.9.12.32. We are not interested in these plugs and are quite satisfied with the British made plugs we… | ||
| Scan053 | Siemens sparking plugs sent for technical evaluation, not as a substitute, with a request for their return. | ||
| View original record | S/W To Hs. from F. 81812a. Copy to Wor. F7/JL.13.12.32. SIEMENS SPARKING PLUGS. With reference to Hs.12/MJ.12.12.32, it was not expected that these plugs would interest you as a substitute for the… | ||
| Scan054 | The return of Siemens sparking plugs and related descriptive literature. | ||
| View original record | 818c To F. From Hs/Pkn. c. to Wor. Hs/Pkn.9/MJ.15.12.32. Re. Siemens Sparking Plugs. We are returning herewith the descriptive literature on the above sparking plugs. As requested in your… | ||
| Scan055 | Despatch note for three Siemens Sparking Plugs to be sent to Col. Fell at Sales. | ||
| View original record | 8182a Despatch Stores. From Hs/Pkn. Hs/Pkn.10/MJ.15.12.32. We are sending into the stores for despatch to Col. Fell at Sales :- Three Siemens Sparking Plugs. Hs/G.Parkin. These are being returned to… | ||
| Scan056 | Acknowledging the receipt of literature and sample Siemens sparking plugs. | ||
| View original record | S/W To Hs/Pkn. from F. C Copy to Wor. X 1812.a. F12/JL.16.12.32. SIEMENS SPARKING PLUGS. We are in receipt of your Hs/Pkn.9/MJ.15.12.32 and the literature returned therewith, also the sample plugs,… | ||
| Scan057 | History, development, and testing of Wizard Sparking Plugs. | ||
| View original record | x 1812..a W/S. F. From Hs/Wst. c. to Wor. c. to Rg. c. to By. c. to EB. Hs/Wst.5/MA.2.10.33. Re. WIZARD SPARKING PLUGS. The Wizard Sparking Plugs have been tested in our engines some time ago with… | ||
| Scan058 | Wizard sparking plug's performance with leaded versus undoped fuels and its high altitude limitations. | ||
| View original record | -2- Hs/Wst.5/MA.2.10.33. Cont'd. Whilst the Wizard sparking plug feature will certainly increase the life of a plug from the point of view of electrode wear, with ordinary undoped fuels such as is… | ||
| Scan059 | Wizard sparking plugs, quoting a letter from the makers about Air Ministry approval and an inquiry for testing on a Buzzard engine. | ||
| View original record | S/W To Hs/Wst. from F. Copy to Wor. [Handwritten]: 51812a F6/JL.12.10.33. WIZARD SPARKING PLUGS, LIMITED. Please see the attached leaflet relating to the above. The following is a copy of a letter… | ||
| Scan060 | Letter to the Air Ministry requesting clarification on sparking plug electrode erosion. | ||
| View original record | 61812.a. Hs/Wst.1/MA. 24th October, 1933. The Secretary, Air Ministry, Adastral House, Kingsway, London, W.C.2. For the attention of Mr.E.M.Emtage R.D.E/EME. Dear Sir, In a letter you have sent to our… | ||
| Scan061 | Letter to the Air Ministry chasing a reply to a previous correspondence. | ||
| View original record | 61812.a. Hs/Wst.5/MA. 7th November, 1933. The Secretary, Air Ministry, Adastral House, Kingsway, London, W.C.2. For the attention of Mr.E.M.Emtage R.D.E./EME. Dear Sir, We shall be glad to know if you… | ||
| Scan062 | Letter from the Air Ministry discussing the rate of erosion in low versus high voltage spark plug gaps. | ||
| View original record | 81812.a AIR MINISTRY, ADASTAL HOUSE, KINGSWAY, W.C.2. Your ref:- Hs/Wst.1/MA. 8th November, 1933. Dear Mr. West, In reply to your letter of the 24th ultimo re the rate of erosion with low voltage… | ||
| Scan063 | Inquiry regarding a previous request concerning Wizard Sparking Plugs, Limited. | ||
| View original record | 81812a S/W. To Hs/Wst. from F. Copy to Wor. F4/JL.8.11.33. WIZARD SPARKING PLUGS, LIMITED. Will you please say whether you are yet in a position to comply with the request in the last paragraph of our… | ||
| Scan064 | Correspondence regarding an agreement between Wizard Sparking Plugs Ltd. and K.L.G.Co. | ||
| View original record | 81812 a. F. From Hs/Wst. c. to Wor. Hs/Wst.6/MA.9.11.33. WIZARD SPARKING PLUGS LTD.,. Answering your F.4/JL.8.11.33 the above concern have now entered into an agreement with the K.L.G.Co., and as the… | ||
| Scan065 | Request to Mr. Jaques of the A.I.D. for a copy of the 'sparking plug test specification E.E.141'. | ||
| View original record | 81812a Mr.Jaques. A.I.D. From Hs/Wst. Hs/Wst.8/MA.21.11.33. If possible, I should like to have a copy of "sparking plug test specification E.E.141" for my information. Could you obtain one for me from… | ||
| Scan066 | Letter to the Royal Aircraft Establishment regarding sparking plug testing and the effects of leaded fuel. | ||
| View original record | 81812a. Hs/Wst.4/MA. 13th December, 1933. Dr.G.F.Bairsto, Royal Aircraft Establishment, South Farnborough, HANTS. Dear Bairsto, In reading through a report from your Dept., on sparking plugs I notice… | ||
| Scan067 | Letter discussing issues with CIS E12S B.T.H. Magnetos and the testing of Phosphor Bronze braided ignition cables. | ||
| View original record | -2- The new CISE12S B.T.H. Magnetos are not performing too well and we have got Messrs.Rotax Ltd., busy with the new design lightened type Watford Magneto for our Kestrel engines. We hope as a result… | ||
| Scan068 | Letter from the Royal Aircraft Establishment discussing sparking plug specifications and the effects of tetra-ethyl lead fuel. | ||
| View original record | G.16/859. 81812a. When Telephoning with regard to this letter please ask for Extension Number............111.. TELEGRAMS: Ballooning, South Farnborough. TELEPHONE: 361 Aldershot. ROYAL AIRCRAFT… | ||
| Scan069 | Letter discussing the discolouration of mica insulation and ongoing flight tests of phosphor bronze braided ignition cable. | ||
| View original record | -2- this corresponds to the "attack of the mica insulation by the lead" referred to in your letter). This discolouration arises from the formation of deposits of bromine compounds of lead and also… | ||
| Scan070 | Transfer of various redundant sparking plugs to the A.M. Bond. | ||
| View original record | r1812a D/BP. From Hs/Wst. c. to G/MT. c. to Mr.Jaques. c. to RHC/EM. Hs/Wst.4/MA.20.1.34. REDUNDANT SPARKING PLUGS. We are sending into the A.M. Bond 20 K.L.G. V9/1S, 21 Lodge X300, and 24 X300B.,… | ||
| Scan071 | The disposal of redundant sparking plugs used for the Schneider Trophy R engine. | ||
| View original record | 81812a. Roy. From Hs/Wst. c. to G/MT. Hs/Wst.6/MA.20.1.34. REDUNDANT SPARKING PLUGS. We are sending into the Stores a quantity of new sparking plugs which were used some years ago in connection with… | ||
| Scan072 | Request to obtain the patent specifications for B.G. sparking plugs. | ||
| View original record | 61812a By/NHW. From Hs/Wst. Hs/Wst.5/MA.26.1.34. B.G. Sparking Plugs. Will you please obtain for me the patent specifications referring to B.G. sparking plugs. Hs/Wst. | ||
| Scan073 | Tests conducted on Siemens sparking plugs with 'Sinterkorund' ceramic insulators. | ||
| View original record | AERONAUTICAL INSPECTION DIRECTORATE 3 - MAY 1934 MESSRS, ROLLS ROYCE, LTD. Report No...E/E&I.827. February, 1934. ROYAL AIRCRAFT ESTABLISHMENT, SOUTH FARNBOROUGH Tests on Siemens sparking plugs with… | ||
| Scan074 | The physical properties, construction, and leakage tests of Sinterkorund sparking plugs. | ||
| View original record | 2. E&I.827. The plug body is of steel and the "Sinterkor-und" insulator with central electrode rests on a copper washer which beds upon a shoulder in the plug body as shown. A second copper washer… | ||
| Scan075 | Gas leakage and pre-ignition tests on various spark plugs. | ||
| View original record | 3. E&I.827 Table 2. Gas leakage results. | Plug. | Leak in c.c/min. | Remarks. | |---------|--------------------|----------------------------| | A.G.10. | | | | 1. | 0.8 cu.cm./min. | Leak from top of… | ||
| Scan076 | Pre-ignition limits and subsequent gas leakage tests on various spark plugs. | ||
| View original record | 4. E&I.827. Table 4. Pre-ignition limits (Method "B"). | Plug. | Highest B.M.E.P. for no pre-ignition. lb/sq.inch. | Plug washer temperature. | Rear of cyl: head temp: |… | ||
| Scan077 | Engine and temperature tests on 'Sinterkorund' insulated sparking plugs, including conclusions on performance and deterioration. | ||
| View original record | 5. E&I.827. With the exception of type A.G.20 No.1 there was a general increase in gas leakage. 7. Engine tests. Two of each type (A.G.10, 20 and 30) "Sinterkorund" insulated sparking plugs were… | ||
| Scan078 | Engine test and the properties of a ceramic material for aero plugs. | ||
| View original record | 6. E&I.827. (b) The engine test in the "Jupiter" VI on the bench was completed satisfactorily. A total of 11 hours 40 minutes was run. (c) The material has good electrical and heat resisting… | ||
| Scan079 | Report appendix comparing the properties of a new ceramic insulating material, 'Sinterkorund', for sparking plugs. | ||
| View original record | Appendix to Report No.R.A.E/E&I.827. I.A.E. Research and Standardisation Committee. A New Insulating Material for Sparking Plugs. H.Kohl, D.Motor-Z., March, 1932, p.60. 'Sinterkorund', a new ceramic… | ||
| Scan080 | Diagram and specification sheet for a Siemens Sinterkorund Insulated Spark Plug, Type A.G. 30. | ||
| View original record | TYPE OF PLUG. GAS VOLUME. WEIGHT. A.G. 10 2.0 Cu Cm 3.19 OZ A.G. 20 1.7 Cu Cm 3.19 OZ A.G. 30 1.3 Cu Cm 3.19 OZ DRC No E & I. 4929. Issued by:- Directorate of Technical Development. AIR MINISTRY DEPT.… | ||
| Scan081 | Cross-section diagram of a patented 'CF' spark plug. | ||
| View original record | SCHEMA CANDELA .CF BREVETTATA - FIMAC - FABBRICA ITALIANA MACCHINE ARIA COMPRESSA MILANO - VIA PETITTI N'18 Milano 12.11.931 | ||
| Scan082 | Description of the C.F. spark plug, patented by Dott. Ing. A. Tebaldi. | ||
| View original record | F. I. M. A. C. MILANO DESCRIZIONE CANDELE C.F. Brevetto Dott.Ing.A.Tebaldi E' noto quanto, specialmente in questi ultimi anni in cui i motori spinti e i motori d'aviazione hanno raggiunto elevatissimi… | ||
| Scan083 | In Italian describing the features and results of the C.F. spark plug. | ||
| View original record | F. I. M. A. C. MILANO 2) Tale conduttività poi varierà proporzionalmente alla pressione con cui l'asticciola preme sul fondo dell'elettrodo, pressione sempre proporzionale alla temperatura della… | ||
| Scan084 | Request to order a small vice for the sparking plug test bench. | ||
| View original record | 818Wa. EJJ. From Hs/Wst. Hs/Wst.7/MA.8.3.34. SPARKING PLUG TEST BENCH. Will you please order for us for the above a small vice. One with a 4" jaw and about 4" opening would be quite suitable. Hs/Wst. | ||
| Scan085 | Internal order request for a Record Vice for the Sparking Plug Test Bench. | ||
| View original record | Req from EJJ/WTP. c to Hs/Wst. WST c/830/840. 81812a EJJ/WTP4/JC10. 3. 34. Re Sparking Plug Test Bench, Exp. Lab. Please order from Messrs. C & J. Hampton Ltd.,:- 1 - No.22, Record Vices, 3¾" Jaws,… | ||
| Scan086 | Testing procedures for taper screwed sparking plug inserts in a Bentley aluminium cylinder head. | ||
| View original record | 81812a. To RHC. from E/Lid. c. Hs. E/Lid.3/HP.23.3.34. Taper Screwed Sparking Plug Inserts. Attached is LeC.3842 shewing a taper screwed sparking plug insert for a Bentley aluminium cylinder head.… | ||
| Scan087 | Report from tester Henniker regarding issues with sparking plug screens and exhaust pipes on a Short Monoplane R24/31. | ||
| View original record | Hs/Wst Lr r 1912a EP/Thn7/MH.7.4.34 COPY OF REPORT FROM TESTER HENNIKER AT SHORT'S, DATED 6.4.34 re SHORT MONOPLANE R24/31 -------------------------- (1) Sparking Plug Screens Hs/Wst Note. "I have… | ||
| Scan088 | Copy of a report from a tester regarding a delay in fitting new sparking plugs to a Short Monoplane R24/31. | ||
| View original record | Hs/Wst Lr c. Mr.Jaques (A.I.D) X1812a. EP/Thn10/MH.11.4.34 COPY OF REPORT FROM TESTER HENNIKER AT SHORT'S, DATED 10.4.34 re SHORT MONOPLANE R24/31 - SPARKING PLUGS ----------------------- "I received… | ||
| Scan089 | The potential testing of miniature 10mm sparking plugs for cylinder design. | ||
| View original record | Rm 8182b To Hs. from E. E.1/HP.23.4.34. c. Sg. Wor. Rg/Rbr. re Miniature Sparking Plugs. No doubt you have seen the article on 10 m/m sparking plugs in Automotive Industries of April 7th and the data… | ||
| Scan090 | Letter to Messrs. Bosch Ltd. requesting a list of aero engine detachable spark plugs for testing purposes. | ||
| View original record | -6 1812a. Hs/Wst.6/MA. 27th April, 1934. Messrs.Bosch Ltd., Acton, London, W.3. Aero Sparking Plugs. Dear Sirs, We wish to obtain some Bosch aero engine detachable sparking plugs for tests and we… | ||
| Scan091 | Letter from Bosch Limited clarifying the required thread size for aero sparking plugs. | ||
| View original record | TELEPHONE: SHEPHERDS BUSH 2080 (4 LINES) TELEGRAMS: ELECBRIGHT, ACT, LONDON Handwritten: 81812a BOSCH LIMITED SOLE AGENTS IN GT. BRITAIN & IRELAND FOR BOSCH PRODUCTS MADE BY ROBERT BOSCH A.G.… | ||
| Scan092 | Letter to Messrs. Bosch Ltd. clarifying sparking plug thread and reach specifications. | ||
| View original record | X1812a Hs/Wst.1/MA. May 2nd, 1934. Messrs.Bosch Ltd., Larden Road, Acton, London, W.3. Dear Sirs, Replying to your letter of the 1st instant reference BEC/DO. The sparking plugs we require are those… | ||
| Scan093 | Request to obtain a sample 18 m/m sparking plug from G.M.S. Plugs Limited. | ||
| View original record | Y182a Roy. Hs/Wst.14/KW.8.5.34 Will you please obtain for us a sample 18 m/m. Sparking Plug from the G.M.S. Plugs Limited, 39, Holborn Viaduct, E.C.1. Hs/Wst. | ||
| Scan094 | Letter from Bosch Limited acknowledging a query about Aero Plugs. | ||
| View original record | TELEPHONE: SHEPHERDS BUSH 2080 (4 LINES) TELEGRAMS: ELECBRIGHT, ACT, LONDON BOSCH LIMITED SOLE AGENTS IN GT. BRITAIN & IRELAND FOR BOSCH PRODUCTS MADE BY ROBERT BOSCH A.G. STUTTGART. HEAD OFFICES:… | ||
| Scan095 | Mechanical weakness of miniature sparking plugs smaller than 14mm. | ||
| View original record | To E. from Hs/Rm. c. Sg. Wor. c. Rg/Rbr. Hs/Rm.8/KW.10.5.34. Miniature Sparking Plugs. For car work our greatest objection to sparking plugs smaller than 14 m.m. is that they become mechanically weak.… | ||
| Scan096 | Letter from G.M.S Plugs Ltd. regarding the supply of an 18 m.m. G.M.S. Plug for testing. | ||
| View original record | 81812a TELEPHONES HOLborn 5934 - 2622 G.M.S PLUGS LIMITED. ALL BRITISH MANUFACTURE DIRECTORS A. Music L. Music 39 Holborn Viaduct E.C.I. OUR REF. AM/LH. YOUR REF. Roy/GEA. 4/VR. 10th May 1934. Messrs… | ||
| Scan097 | Ministry's instructions for the type testing of sparking plugs. | ||
| View original record | WST r1812a Mr. Loxford. c to Mr. Hives./West c to Mr. Robbins. R/B/s 31-5-34 Type Test of Sparking Plugs Instructions have been received from the Ministry that before any sparking plugs are finally… | ||
| Scan098 | Translation of a patent description for C.F. Sparking Plugs by Dr. A. Tebaldi. | ||
| View original record | Translation. 8/12a Hs thought you had written to the By X1812 C.F. SPARKING PLUGS patent Dr.A.Tebaldi. Engineer. DESCRIPTION ----------- It has been observed, especially in these last years, in the… | ||
| Scan099 | Description of a self-regulating C.F. sparking-plug, detailing its operation based on thermal expansion and its advantages. | ||
| View original record | 2 of the C.F. sparking-plug in a most simple manner: The central electrode is hollow and provided inside with a small rod or pin of very high heat conductivity and high coefficient of dilatation. This… | ||
| Scan100 | Inquiry sent to Major Carington of K.L.G. Sparking Plugs regarding a novel Italian-made spark plug. | ||
| View original record | 8182a Hs/Wst.3/MA. 28th May, 1934. Major Carington, Messrs.K.L.G.Sparking Plugs Ltd., Robinhood Engineering Works, Putney Vale, London, S.W.15. Dear Major Carington, Have you heard of the C.F.… | ||
| Scan101 | Letter from K.L.G. Sparking Plugs discussing various spark plug designs and requesting breakdown voltage test results. | ||
| View original record | 8912a TELEPHONE: PUTNEY 2671-2-3-4. TELEGRAMS: KAELGEE, PHONE, LONDON CONTRACTORS TO THE ADMIRALTY - WAR OFFICE - AIR MINISTRY & FOREIGN GOVERNMENTS CODES USED: A.B.C. 5TH EDITION WESTERN UNION K.L.G.… | ||
| Scan102 | Letter from K.L.G. Sparking Plugs regarding the development and upcoming samples of V.7/2 plugs. | ||
| View original record | K.L.G. Sparking Plugs Limited CONTINUATION NO 1. DATE 30.5.34. H.E. West, Esq. You will be interested to know that we are also working on the V.7/1 and I think it is probable that in the course of a… | ||
| Scan103 | Letter concerning the testing and comparison of different sparking plugs. | ||
| View original record | 81912a Hs/Wst.8/MA. 31st May, 1934. Messrs. K.L.G. Sparking Plugs Ltd., Robinhood Engineering Works, Putney Vale, London, S.W.15. For the attention of Major C.M. Carington. Dear Sir, Referring to your… | ||
| Scan104 | Requesting a copy of the R.D.E. Specification for sparking plug type-tests. | ||
| View original record | x)972a Mr.Jaques. From Hs/Wst. Hs/Wst.1/MA.1.6.34. TYPE-TESTS OF SPARKING PLUGS. Referring to you memo of the 31st instant reference E/5/3 we should be glad if you will issue us a copy of R.D.E.… | ||
| Scan105 | Specification and schedule of tests for 18 mm type sparking plugs for aero engines. | ||
| View original record | X1812 a R.D.E.2. Specification No.31. Issue No.1. April, 1934. Air Ministry. Directorate of Technical Development. (190225/32). This document is the property of H.M.Government. This document is… | ||
| Scan106 | Specifications for aero engine sparking plugs, including bodies and gland nuts. | ||
| View original record | -2- 3. Modifications. No deviation from the materials or modifications to the design or construction of any sparking plug which has received provisional or final type approval may be made without… | ||
| Scan107 | Specification for sparking plug components, markings, and testing procedures. | ||
| View original record | -3- (e) Sparking plug centre and gland nuts, if integral, shall be interchangeable in the steel bodies. 7. Central Electrode Terminal. (a) Terminal adaptors of an approved pattern are to be used for… | ||
| Scan108 | Specifications and testing procedures for spark plugs, including gap setting, mechanical tests, and gas leakage. | ||
| View original record | -4- (b) For the purpose of setting the gap to discharge at any voltage given in the table, a cylindrical "Go" and "Not Go" gauge of appropriate dimensions shall be used. The "Not Go" end of the gauge… | ||
| Scan109 | Specification and testing procedures for sparking plugs, covering electrical and engine tests. | ||
| View original record | -5- (b) Test for Tightness of Gland. Three sparking plugs which have been submitted to the previous three tests shall have the central electrode gland detached and then assembled again. This shall be… | ||
| Scan110 | Acceptance test procedures and requirements for subsequent production sparking plugs. | ||
| View original record | -6- (b) In addition, a half engine set of sparking plugs shall have completed satisfactorily 25 hours in a similar engine in flight during which the capability of the sparking plugs for coping with… | ||
| Scan111 | Letter from Bosch Limited responding to an enquiry about aero plugs and requesting further engine details. | ||
| View original record | TELEPHONE: SHEPHERDS BUSH 2080 (4-LINES) MAGNETOS, DYNAMOS, ELECTRIC STARTERS, SPARKING PLUGS, BICYCLE LIGHTING SETS, WINDSCREEN WIPERS. DIRECTORS: P. J. A. CLAUSEN, (BRITISH OF DANISH ORIGIN) J. W.… | ||
| Scan112 | Letter to Bosch Ltd. clarifying the specifications for detachable plugs, referencing a similar K.L.G. plug. | ||
| View original record | 8/P/62a Hs/Wst.1/MA. 2nd June, 1934. Messrs.Bosch Ltd., Larden Road, Acton, London, W.3. Dear Sirs, Replying to your letter of the 1st instant reference BEC/DO the plugs we were enquiring about would… | ||
| Scan113 | Follow-up letter from Wilson & Moore (M/c.) Ltd. regarding a 'Chamber-Quartz' sparking plug. | ||
| View original record | WST s/19/2a WILSON & MOORE (M/c.) Ltd. ENGINEERS :: SPECIALISTS DIRECTORS: T. E. MOORE L. MOORE. 44, GROSVENOR CHAMBERS, 16, DEANSGATE, MANCHESTER, 3. Rolls-Royce Motors Ltd. June 4/24 Derby. Dear… | ||
| Scan114 | Letter rejecting a sample sparking plug due to design flaws with its 'Quartz' insulator. | ||
| View original record | Y 18/2a. Hs/Wst.5/MA. 7th June, 1934. Messrs. Wilson & Moore (M/c.) Ltd., 44, Grosvenor Chambers, 16, Deansgate, Manchester, 3. Dear Sirs, We thank you for your letter of the 4th instant and beg to… | ||
| Scan115 | Attached letter about plugs. | ||
| View original record | S/W To Hs/Wst. from Lp. Copy to Wor. EP. 81812a WST Lp4/JL.8.6.34. Re: PLUGS. Will you please note the attached copy of a letter which I have received this morning from Mr. Emtage. Attachment:- Copy… | ||
| Scan116 | Correspondence regarding flight investigations into spark plugs for Kestrel engines in Osprey aircraft. | ||
| View original record | COPY AIR MINISTRY, ADSTRAL HOUSE, Kingsway, W.C.2. 6th June, 1934. My Dear Lappin, Further to our correspondence on the subject of plugs for Kestrel engines in Osprey, the Royal Aircraft Establishment… | ||
| Scan117 | Résumé of the development of various sparking plugs for new aero engines. | ||
| View original record | E. From Hs/Wst. c. to Wox. c. to By. c. to EP. c. to Lr. c. to Lp. c. to Mr.Jaques. A.I.D. 81912a. Hs/Wst.9/MA.8.6.34. AERO ENGINE SPARKING PLUG DEVELOPMENT. We give below a résumé of the development… | ||
| Scan118 | Spark plug options and testing for Goshawk, P.V.12, and Kestrel VI engines. | ||
| View original record | -2- Hs/Wst.o/MA.8.6.34. Cont'd. All Goshawk engine plugs have ball ends for use either with the K.L.G. radio screened plug terminal which we have developed, or the unscreened Watford "snap on" plug… | ||
| Scan119 | Letter from Wilson & Moore Ltd. responding to feedback on a sample Quartz-Chamber plug. | ||
| View original record | WILSON & MOORE (M/c.) Ltd. ENGINEERS :: SPECIALISTS DIRECTORS: T. E. MOORE L. MOORE. 44, GROSVENOR CHAMBERS, 16, DEANSGATE, MANCHESTER, 3. 81812a. Rolls-Royce Ltd Derby. WST June 11/34. Dear Sirs In… | ||
| Scan120 | Request to arrange the return of a loaned Quartz Chamber sparking plug to Messrs. Wilson & Moore Ltd. | ||
| View original record | 81912a Roy. From Hs/Wst. c. to G/MT. c. to D/BP. Hs/Wst.1/MA.12.6.34. Will you please arrange to return to Messrs. Wilson & Moore (M/c.) Ltd., 44, Grosvenor Chambers, 16, Deansgate, Manchester, 3. -… | ||
| Scan121 | Asking for a decision regarding sparking plugs to circulate information to outside men. | ||
| View original record | Y1812a Hs/Wst WST EP/Thn12/MH.15.6.34 re Lp4/JL.8.6.34 - SPARKING PLUGS --------------------------------- With reference to the above, together with a letter from E.Mayall Emtage to Lp, a copy of… | ||
| Scan122 | Attached letter from Mr. Emtage about the V.9/1 plug. | ||
| View original record | S/W To Hs. from Lp. WST Copy to Wor. EP. 81812a. Lp11/JL.15.6.34. Attached is copy of letter which I have received from, Mr. Emtage. You will note what he says in regard to the V.9/1 plug.… | ||
| Scan123 | Letter from the Air Ministry discussing alternative spark plugs for the Kestrel engine. | ||
| View original record | COPY AIR MINISTRY, Adastral House, Kingsway, W.C.2. Your Ref. Lp5/J18634. 11th June, 1934. KESTREL PLUGS. My dear Lappin, In reply to yours of the 8th, the V.9/1 in our view should not be quoted as an… | ||
| Scan124 | The correct type of sparking plugs for various Kestrel engines. | ||
| View original record | 81812a EP. From Hs/Wst. Hs/Wst.7/MA.19.6.34. SPARKING PLUGS. Replying to your EP/Thn.12/MH.15.6.34., it has been decided that on Kestrel M.S. engines the Lodge A2/2 is at the moment the best sparking… | ||
| Scan125 | The suitability of K.L.G. V7/1 sparking plugs for Kestrel S engines and suggesting Lodge A2/2 plugs as an alternative. | ||
| View original record | Hs/Wst WST r/12a EP/AGR30/MH.20.6.34 re SPARKING PLUGS With reference to the last sentence of your Hs/Wst.7/MA.19.6.34, we do not agree that K.L.G. V7/1 plugs are suitable for use in Kestrel S.… | ||
| Scan126 | Cover letter regarding a translated report on experiments conducted on a patented plug. | ||
| View original record | 1812a Hs. ------ BY.3/G.20.6.34. WST I am sending you herewith copy of a letter which we have received from Mr. Tebaldi of Milan, which covers a translation of a series of experiments which he has… | ||
| Scan127 | Translated letter from A. Tebaldi of Milan concerning thermodynamic tests on sparkling plugs and a vacuum pump coupling plan. | ||
| View original record | TRANSLATION. -------- Letter from A. Tebaldi, of Milan. June 14th. 1934. Dear Sir, I have had a report translated concerning the thermodynamic tests carried out on my sparkling plugs, with a view to… | ||
| Scan128 | Tests carried out on C.F. sparking plug electrodes to determine the variation of the transmission coefficient. | ||
| View original record | F.I.M.A.C. MILANO REPORT ON TESTS CARRIED OUT ON ELECTRODES C.F. Sparking Plugs. ------- These tests were carried out by Messrs. FIMAC in their workshops, to determine the variation value of the… | ||
| Scan129 | Page 2 of a report detailing heat transfer calculations using a calorimeter. | ||
| View original record | F.I.M.A.C. MILANO -2- in same however). 600" were required to bring the temperature of the calorimeter from 30 to 35°, and therefore the heat given by the heater to the calorimeter at 1" is of… | ||
| Scan130 | Page 3 of a report detailing heat transfer and conductivity calculations for a calorimeter experiment. | ||
| View original record | F.I.M.A.C. MILANO -3- Qc = 0,389 / 140 = 0,00278 By taking away from same that given by the heater, it will be: Qc = 0,00278 - 0,00065 = 0,00213 The coefficient of transmission per hour and for a jump… | ||
| Scan131 | Experiment measuring the coefficient of heat transmission through copper rods under varying pressures, including a formula and a graph of results. | ||
| View original record | F.I.M.A.C. MILANO -4- a small copper rod resting on another small copper rod dipped in the mercury. The calorimeter was then mounted on a swinging bracket and arranged in such a way that the two… | ||
| Scan132 | Report page detailing the results of experiments on the heat transmission coefficients of sparking plugs. | ||
| View original record | F.I.M.A.C. MILANO -5- It can be concluded from the series of experiments carried out several times, and of which the average results were used, that 1.- Variation of the coefficient of transmission of… | ||
| Scan133 | Report from F.I.M.A.C. Milano on spark plug performance, detailing conductivity, temperature, and material deformation. | ||
| View original record | F.I.M.A.C. MILANO -6- connection with the contact pressure, clearly shows how the conductivity varies a proportional law to pressure, and hence to expansion of the pin, and this explains how pressure… | ||
| Scan134 | Page from a report by F.I.M.A.C. MILANO concerning temperature, spark, and wear. | ||
| View original record | F.I.M.A.C. MILANO -7- can no longer reach high temperatures, and that is to say, by not letting off the spark between the elements at a very temperature, a minimum wear and tear is obtained. | ||
| Scan135 | Schematic of a calorimeter for measuring the heat transfer coefficient of a spark plug. | ||
| View original record | Fig. 1 T=216°C isolante termico olio Sorgente calore mercurio a 150°C acqua sostegno scarico camera in depressione SCHEMA DEL CALORIMETRO USATO PER RILEVARE IL COEFFICENTE TERMICO DI TRASMISSIONE DEL… | ||
| Scan136 | Diagram of a calorimeter used for measuring the coefficient of thermal transmission between two copper rods. | ||
| View original record | FIG. 2 T=216° C Sostegno leva mercurio a 150°C. lo/b SCHEMA DEL CALORIMETRO USATO PER RILEVARE IL COEFFICIENTE TERMICO DI TRASMISSIONE DEL CALORE DI UN'ASTA DI RAME SPINTA CONTRO UN'ALTRA ASTA DI… | ||
| Scan137 | Letter from Bosch Limited regarding a request for a K.L.G. type 744 spark plug, asking for its required characteristics for engine testing. | ||
| View original record | TELEPHONE: SHEPHERDS BUSH 2080 (4-LINES) BOSCH LIMITED TELEGRAMS: ELECBRIGHT, ACT, LONDON (Handwritten Top Centre: 81812a) MAGNETOS, DYNAMOS, ELECTRIC STARTERS, SPARKING PLUGS, BICYCLE LIGHTING SETS,… | ||
| Scan138 | Page 2 of a letter from a Bosch Limited Director regarding meeting requirements. | ||
| View original record | -2- BOSCH LIMITED. 21.6.34 works will at once apply themselves to examine the position with a view to meeting your requirements. Yours faithfully, BOSCH LIMITED. J.H. Houghton Director. | ||
| Scan139 | Clearance issue with Bentley ignition plugs fouling distributor leads and causing a potential short circuit. | ||
| View original record | To Hs. c. to Hs/Rm. c. to E. c. to By. c. to Hs/Wst. X 1812c Hs/GWH.8/KW.22.6.34. Bentley Ignition Plugs. The fitting of the terminals to the ignition plugs has caused the terminal of No. 1 cylinder… | ||
| Scan140 | Note arranging the supply of a set of sparking plugs to Moseley. | ||
| View original record | r 1812a RHC/CEP. From Hs/Wst. Hs/Wst.6/MA.22.6.34. With reference to the attached note EP/Thn.16/MH.20.6.34., will you kindly arrange to despatch a set of sparking plugs to Moseley, we will arrange to… | ||
| Scan141 | Letter to Bosch Ltd. discussing the difficulty of specifying suitable spark plug characteristics for engines. | ||
| View original record | 6/18/2a Hs/Wst.3/MA. 23rd June, 1934. Messrs.Bosch Ltd., Larden Road, Acton, London, W.3. Dear Sirs, Replying to your letter of the 21st instant reference JWH/MA. it is very difficult for us to… | ||
| Scan142 | Letter from Bosch agreeing to test a 744 plug and submit suitable samples in return. | ||
| View original record | TELEPHONE: SHEPHERDS BUSH 2080 (4 LINES) MAGNETOS, DYNAMOS, ELECTRIC STARTERS, SPARKING PLUGS, BICYCLE LIGHTING SETS, WINDSCREEN WIPERS. DIRECTORS: P. J. A. CLAUSEN, (BRITISH OF DANISH ORIGIN) J. W.… | ||
| Scan143 | Goshawk I type test for sparking plugs, detailing electrode erosion measurements. | ||
| View original record | To EP. 811/12a Hs/Wst.1/KW.11.7.34. Goshawk 1. Type Test Sparking Plugs. Lodge X.400.B and K.L.G. 744.B Sparking Plugs were used on the above type test and we attach herewith a table giving the… | ||
| Scan144 | Spark plug wear measurements by engine position and plug type. | ||
| View original record | -2- Hs/Wst.1/KW.11.7.34. Position in Type of Diam of Wear Engine Plug Electrode B31 K.L.G. .063 .037 744 B B41 " .065 .035 B51 " .057 .043 B61 " .063 .037 B1E Lodge .060 .040 X400B B2E " .085 .035 B3E… | ||
| Scan145 | Summary of research on the three phases of spark plug discharge connected to a magneto. | ||
| View original record | COPY. 81812.a. I.A.E. RESEARCH AND STANDARDISATION COMMITTEE. Research Department, 5, Bolton Road, Chiswick, W.4. No. 7228, Class 222, 220. August, 1934. Sparking Plug Research R.Anthouard,… | ||
| Scan146 | Report from the Royal Aircraft Establishment on tests of B.B. Bologna sparking plugs type S.6. | ||
| View original record | Y.1812. WST Report No. R.A.E./E. and I.856. September, 1934. HS ROYAL AIRCRAFT ESTABLISHMENT, SOUTH FARNBOROUGH, Tests on B.B. Bologna Sparking Plugs Type S.6. R.A.E. Ref: E. and I/S.P.451. A.M. Ref:… | ||
| Scan147 | Detailed description and weight comparison of a sparking plug. | ||
| View original record | Report No.R.A.E./E. and I.856. -2- The sparking tip consists of a short length of nickel rod approximately No.11 gauge, one end of which is pressed into the upper part of the central electrode… | ||
| Scan148 | Report page detailing the dimensions and test results for a plug, including a comparison with Bologna plug dimensions. | ||
| View original record | Report No. R.A.E./E. and 1.856 -3- 4. Dimensions. The main dimensions of the plug are shown in the attached Fig.1. Departure from standard British dimensions are given in Table 2 below. Table 2. -… | ||
| Scan149 | Results of gas leakage, gland tightness, and external flash over tests on a set of six plugs. | ||
| View original record | Report No.R.A.E./E. and 1.056. -4- The results are given in Table 3 below. The applied air pressure was 600 lb. per sq. inch and the amount of leakage is given in cu. cms. per minute. Table 3 - Gas… | ||
| Scan150 | Report page detailing a series of spark plug tests, including flash over, dielectric strength, air pressure, and in-flight engine tests. | ||
| View original record | Report No.R.A.E./E. and I-865. -5- 10. Internal surface flash over test. Three plugs were subjected to this test. Each plug withstood 12000 volts for 10 seconds without internal flash over as… | ||
| Scan151 | Report page detailing the satisfactory condition of spark plugs after 10 hours of flight tests. | ||
| View original record | Report No.R.A.E./E. and I.965. -6- No trouble arose during the flight tests which totalled 10 hours. Subsequently the plugs were tested, dismantled and examined. Each plug sparked satisfactorily under… | ||
| Scan152 | Diagram of a sparking plug, type Bologna S.6, with component labels and specifications. | ||
| View original record | S.P. 451. GAS SPACE VOLUME = 1.6 C.C. LEAKAGE PATH = 6.5 M/M WEIGHT = 3 ozs. 7 DRAMS. DEPT: ELECTRICAL & IGNITION DRAWN: J. Carson TRACED: L.E.B. 23-8-34 CHECKED: C.U. ~1/9/34 APPROVED: G.E.Saints… | ||
| Scan153 | Inter-organization letter from Cadillac discussing car antennas and ignition suppressors. | ||
| View original record | R 1812 C. CADILLAC MOTOR CAR COMPANY INTER-ORGANIZATION LETTERS ONLY TO Mr. Olley WST DATE September 17, 1934 ADDRESS FROM ADDRESS SUBJECT Please answer Mr. Robotham as follows: Our antenna is a piece… | ||
| Scan154 | Requesting the stelliting of 21 centre electrodes for sparking plug trials. | ||
| View original record | 81812a RHC. From Hs/Wst. Hs/Wst.2/MA.2.10.34. STELLITED TIPPED SPARKING PLUGS. You will remember that you successfully stellited some sparking plugs for us some time ago and we now wish to try a… | ||
| Scan155 | Order for various types of aero sparking plugs. | ||
| View original record | X1812a Roy. From Hs/Wst. Hs/Wst.8/MA.3.10.34. AERO SPARKING PLUGS. Please order for us to order No.54002. 4 dozen K.L.G. type 836 B plugs. 4 dozen Lodge X400B plugs. 2 dozen Lodge X420B plugs. Hs/Wst. | ||
| Scan156 | The supply of Lodge and K.L.G. sparking plugs for a Goshawk 35 fuel economy test. | ||
| View original record | 818/2a. RHC/CEP. From Hs/Wst. c. to G/Rb. c. to Mr.Jaques. Hs/Wst.3/MA.11.10.34. GOSHAWK 35 FUEL ECONOMY TEST. Will you please note that we supplied for the purposes of this test 12 Lodge X400B & 12… | ||
| Scan157 | Translated research paper on the working of sparking plugs by R. Anthouard. | ||
| View original record | Translation from the French: RESEARCHES ON THE WORKING OF SPARKING PLUGS, by R. Anthouard We have studied the intensity "i" and the voltage "V" of the current supplied bya one-plug magneto. Both "i"… | ||
| Scan158 | Analysis of spark ignition phenomena, including tension, pressure effects, and wire armouring. | ||
| View original record | 2 the arc phase, and sometimes by oscillations at a frequency rate of 10^-6 (fig.2). Tension.- This shows great differences, according as to whether the distribution of the magneto is of the carbon… | ||
| Scan159 | The phases of a spark, parasites in wireless reception, and the construction of plugs and magnetos. | ||
| View original record | 3 discharges are less numerous, but intensity at the beginning of the arc phase is increased. Parasites (atmospherics) in wireless reception.- Their origin is probably to be found in the disruptive… | ||
| Scan160 | Technical studies on magneto discharge, spark plug operation, and thermal control systems. | ||
| View original record | MARS 1934. N° 178 L'AÉRONAUTIQUE Bulletin "L'Aérotechnique" 29 circuits chauffants et l'on relève, en fonction du temps, les températures en différentes régions du mannequin. Cet essai est évidemment… | ||
| Scan161 | Page from the French publication 'L'Aéronautique' discussing spark plug oscillograph recordings. | ||
| View original record | 30 L'AÉRONAUTIQUE Bulletin " L'Aérotechnique " MARS 1934. N° 178 Enregistrements d'étincelles de bougies (intensité ou voltage) obtenus à l'oscillographe. Records of sparks (plugs) obtained on the… | ||
| Scan162 | Letter to Cadillac discussing sparking plug suppression, idling performance, and experiments with hotter plugs and shielded systems. | ||
| View original record | Y1812. Hs/Wst.6/MA. 26th October, 1934. E.K.Schadt, Esq., Electrical Engineer, Cadillac Motor Car Company, Detroit, Michigan, U.S.A. Dear Sir, Mr.Robotham has passed on to me the information which you… | ||
| Scan163 | Letter from an Electrical Engineer requesting information on the performance of dynamos on La Salle and Cadillac cars. | ||
| View original record | -2- With regard to dynamos on the La Salle and Cadillac we should be interested to know the maximum speed at which you can run these, and the maximum output without undue sparking at the commutator… | ||
| Scan164 | Confirming the return of faulty Bentley sparking plugs for remarks. | ||
| View original record | Hs/Rm. Dm WST Hd/SB18/IB.30.10.34. 8182L Re: Bentley Sparking Plugs. -------------------------- We confirm having handed you a number of Bentley Sparking Plugs which have been returned to us as faulty… | ||
| Scan165 | Outlining the procedure for submitting sparking plugs for servicing and overhaul. | ||
| View original record | 87812 J.Jones. c.to H.Whyman (Garage) c. to W.Leech (Aero Test). Hs/Wst.T/MA.12.12.34. SERVICING OF SPARKING PLUGS. Sparking plugs sent in for overhaul and test must not be received unless they are… | ||
| Scan166 | Tests on sparking plugs fitted with electrodes coated with palladium, platinum and rhodium to reduce erosion caused by spark discharge. | ||
| View original record | WST V1812. H/l/war. Report No.R.A.E/E&I.818. November,1933. ROYAL AIRCRAFT ESTABLISHMENT, SOUTH FARNBOROUGH. Tests on sparking plugs fitted with electrodes coated with palladium, platinum and rhodium… | ||
| Scan167 | The erosion of different coated spark plug electrodes during tests in a Kestrel engine. | ||
| View original record | 2. E&I.818. The amount of erosion of the electrodes during tests of 40 hours duration on each material was measured at frequent intervals and the results are shown on Fig.1. It will be seen that the… | ||
| Scan168 | Tests on standard, palladium, and rhodium coated K.L.G. Type VII plugs in a 'Pegasus' engine. | ||
| View original record | 3. E&I.818. 5. Tests in "Pegasus" engine. Two K.L.G. Type VII plugs, one with palladium and the other with rhodium coated electrodes were fitted in No.6 and No.7 cylinders of a "Pegasus I.M.3. engine.… | ||
| Scan169 | Conclusions on the effectiveness of platinum, palladium, or rhodium coatings on nickel electrodes to delay erosion. | ||
| View original record | 4. E&I.818. coated electrode shows an amount of erosion nearly twice that of the standard material. These two tests show that coating the electrodes with either palladium or rhodium is of no practical… | ||
| Scan170 | Photographic comparison of standard, palladium coated, and rhodium coated K.L.G. V.II spark plug electrodes. | ||
| View original record | K.L.G. V.II STANDARD. "A". K.L.G. V.II WITH PALLADIUM COATED ELECTRODES. "P". K.L.G. V.II STANDARD. "B". K.L.G. V.II WITH RHODIUM COATED ELECTRODES. "R". | ||
| Scan171 | Study of spark plug electrode erosion, comparing coated vs. uncoated nickel and different noble metal coatings in a Kestrel engine. | ||
| View original record | S.P. 272. Issued by:- Directorate of Technical Development. AIR MINISTRY DRC No E&I 4905. DEPT: ELECTRICAL & IGNITION. DRAWN: W.R.D. 6-12-33 TRACED: N.A.H. 5-12-33 CHECKED: W.S. 6-12-33 APPROVED: C.E.… | ||
| Scan172 | Confirming the arrangement for a pressure rig for sparking plug tests. | ||
| View original record | 81812. EJJ. From Hs/Wst. Hs/Wst.4/MA.30.11.34. PRESSURE RIG FOR SPARKING PLUG TESTS. We confirm that you will [strikethrough: arrange] to fix us up with a small electrically driven air [handwritten:… | ||
| Scan173 | Order for K.L.G. and Lodge spark plugs. | ||
| View original record | Y 1812. Roy. From Hs/Wst. Hs/Wst.14/MA.17.12.34. Please order for us to order No.54202 :- 24 K.L.G. 769B plugs. .24 Lodge X453B plugs. Hs/Wst. | ||
| Scan174 | Solutions for improving the cooling and reliability of aero engine sparking plugs. | ||
| View original record | V18/2. To Hs. from E. E.1/HP.26.1.35. c. Sg. Wor. By. E/Rbr. Hs/Wd. Hs/Wst: E/PSN. *as we did on the Schneider Cup engines. re Aero Sparking Plugs. We are informed by Hs/Wst. that he is having… | ||
| Scan175 | Use of spark plugs in aluminium and the possibility of adding an inter-cooler. | ||
| View original record | - 2 - E.1/HP.26.1.35. any of our competitors are using plugs direct in the aluminium. The only objection we know of is that a sparking plug having a damaged thread might be used in the cylinder with… | ||
| Scan176 | Internal order request for two types of sparking plugs from two different suppliers. | ||
| View original record | Roy. From Hs/Wst. 86000. Hs/Wst.3/MA.4.2.35. SPARKING PLUGS. Please order for us from Messrs.Lodge Co., 36 type R.R.14 sparking plugs and from K.L.G.Co., 24 type 851 sparking plugs. Order No.54317.… | ||
| Scan177 | Clarifying which aero sparking plugs have official Air Ministry approval for flight purposes. | ||
| View original record | EP/AGR. From Hs/Wst. c. to By. c. to Roy. V1812. Hs/Wst.5/MA.4.2.35. AERO SPARKING PLUGS. Answering your EP/AGR.7/MH.31.1.35., although we have recommended the V9/1B plug for all purposes on the… | ||
| Scan178 | Order for a Dewrance pressure gauge for a sparking plug test rig. | ||
| View original record | [Struck through: Roy] - from EJJ/JV. c to Hs/Wst. Order No. 815. EJJ/JV5/JC4. 3. 35. Re Sparking Plug Test Rig, Electrical Exp. Dept. Please order from Messrs. Dewrance & Co.:- 1 - Dewrance Pressure… | ||
| Scan179 | Packing note from Lissen Limited for 12 spark plugs sent for testing purposes. | ||
| View original record | PACKING NOTE PLEASE QUOTE THIS REFERENCE NO. SI 8547 6000. LISSEN LIMITED LISSENIUM WORKS WORPLE ROAD, ISLEWORTH, MIDDLESEX aG/nS/990 THE MANAGER, BUYING DEPT., MESSRS. ROLLS-ROYCE LTD., DERBY. ORDER… | ||
| Scan180 | Urgent order request for two types of aero sparking plugs. | ||
| View original record | Roy. From Hs/Wst. 16000 Hs/Wst.5/MA.5.3.35. AERO SPARKING PLUGS. Please order for us :- 6 dozen Lodge X465B plugs to order No.55123. 6 Dozen K.L.G. 868B plugs to order No.54202. Delivery very urgently… | ||
| Scan181 | To place an urgent order for two different types of spark plugs from suppliers Lodge and K.L.G. | ||
| View original record | V6000 Roy. From Hs/Wst. Hs/Wst.1/MA.30.3.35. SPARKINGPLUGS. Please order for us the following plugs from Messrs.Lodge to order No.54317 36 type R.R.14 plugs. from Messrs.K.L.G. to order No.54202. 36… | ||
| Scan182 | List of experimental plugs for testing, detailing their specific types and characteristics. | ||
| View original record | EXPERIMENTAL PLUGS FOR TEST. Type 864 - Similar to 744 but with thin platinum central electrode. " 868 - Ramp head plug for comparison. " 871 - Increased thickness of copper sleeve. Otherwise… | ||
| Scan183 | Letter from Lissen Ltd. offering a new range of mica sparking plugs and sending samples for testing. | ||
| View original record | CONTRACTORS TO H.M. & COLONIAL GOVERNMENTS. [LOGO: NATIONAL SCHEME FOR DISABLED MEN] [LOGO: BY APPOINTMENT CREST] [LOGO: FBI INCORPORATED BY ROYAL CHARTER] DIRECTORS: MAGNUS GOODFELLOW A. H. SHEPPARD,… | ||
| Scan184 | Continuation sheet from Lissen Limited proposing collaboration on a special spark plug for 1935/6 models. | ||
| View original record | LISSEN LIMITED. Rolls-Royce Ltd. CONTINUATION SHEET No. 1. present range being unsuitable for your 1935/6 models we should be prepared to collaborate with your technical staff in producing a special… | ||
| Scan185 | Advertising leaflet for Lissen Mica Plugs, detailing their benefits and providing maintenance advice. | ||
| View original record | THE BRIGHT YOUNG SPARK The new LISSEN 5/- CHROMIUM PLATED MICA PLUGS Fit LISSEN MICA PLUGS THIS EXTREMELY NEAT USEFUL MAINTENANCE CHART FREE WITH EVERY SET OF FOUR 5/- LISSEN MICA PLUGS LISSEN LIMITED… | ||
| Scan186 | Advertisement and recommendation list for Lissen chromium-plated mica plugs, including models for various motor cars and motorcycles. | ||
| View original record | THE BRIGHT YOUNG SPARK for MORE MILES PER GALLON MORE MILES PER HOUR GREATER ACCELERATION EASIER STARTING The new LISSEN CHROMIUM PLATED MICA PLUGS Remember! THE YEAR'S GUARANTEE and FREE GIFT of neat… | ||
| Scan187 | Difficulty of fitting screened plugs on Kestrel X, XI, and XII engines. | ||
| View original record | WST seen Hs. Y6000. BY.9/G.9.4.35. SCREENED PLUGS - KESTREL X., Xl and Xll. --------------------------------------- In the past the Air Ministry appear to have winked at the fact that it is apparently… | ||
| Scan188 | Order for various types of aero sparking plugs. | ||
| View original record | 86000. Roy. From Hs/Wst. Hs/Wst.2/MA.16.4.35. AERO SPARKING PLUGS. Please order for us to order No.54202. (Note: the phrase 'for us to order' is struck through) ✓24 Lodge X453B plugs. 24 K.L.G. 868B… | ||
| Scan189 | The flight approval of V9/1B sparking plugs for 6 lbs boost engines. | ||
| View original record | Y6 000. EP. From Hs/Wst. c. to BY. c. to Lp. c. to Mr.Jaques. Hs/Wst.6/MA.25.4.35. SPARKING PLUGS FOR 6 lbs BOOST ENGINES. Replying to your EP.1/MH.25.4.35., we have discussed this matter at length… | ||
| Scan190 | Misfiring Bentley sparking plugs at high engine revs when hot. | ||
| View original record | HS. WST r6000. Hd/SB18/IB.30.4.35. re Bentley Sparking Plugs. ------------------------- We have received from Kingsbury several sets of sparking plugs removed from Chassis due to complaints of… | ||
| Scan191 | The electrical testing of Bentley sparking plugs and follow-up actions. | ||
| View original record | Hd/SB. From Hs/Wst. Hs/Wst.2/MA.8.5.35. 16-ood Re. BENTLEY SPARKING PLUGS. With reference to your Hd/SB.18/IB.30.4.35., we have given these plugs complete electrical test and find same to be in good… | ||
| Scan192 | Typed memo proposing a meeting to discuss sparking plug failures. | ||
| View original record | 86000. K. From Hs/Wst. Hs/Wst.5/MA.9.5.35. I am proposing to call on you on Tuesday next to discuss with CK. sparking plug failures. As far as I can see it will be immediately after lunch, as I have… | ||
| Scan193 | Request to order a Coddington magnifier for analysing aero sparking plug failures. | ||
| View original record | ~6000 EJJ. From Hs/Wst. Hs/Wst.4/MA.10.5.35. MAGNIFIER FOR ANALYSING PLUG FAILURES. We require a high power magnifying glass to examine mica pin holes and lead deposit on aero sparking plugs. Will you… | ||
| Scan194 | Approved spark plugs for Kestrel engines with take-off boost. | ||
| View original record | V6000 EP. From Hs/Wst. c. to Lp. c. to By. Hs/Wst.6/MA.13.5.35. PLUGS FOR KESTREL ENGINES WITH 6 lbs "TAKE-OFF" BOOST. We have received a telephone message from Mr.Emtage of the Air Ministry to the… | ||
| Scan195 | Modifications for the use of screened plugs in Kestrel engines. | ||
| View original record | WST Hs/Wst. H6000. BY.3/G.2.5.35. KESTREL 1.B., KESTREL X and Kestrel Xl. TYPE ENGINES. RE: USE OF SCREENED PLUGS. With reference to Hs/Wst.5/MA.1.5.35. I went down to the Test Department and arranged… | ||
| Scan196 | Internal order request for a Coddington Magnifier for analysing plug failures. | ||
| View original record | Reqy from EJJ/JV. c to Hs/Wst. Order No.811. V6000 EJJ/JV8/JC10. 5. 35. WST Re Magnifier for Analysing Plug Failures. Electrical Exp. Dept. Please order from Messrs.W & J George Ltd., :- 1 -… | ||
| Scan197 | Internal memorandum discussing the suitability and failure of various ignition plugs for 'Kestrel' engines under different boost conditions. | ||
| View original record | V6000. BY c.c. Lp Hs/Wst Hs Mr.Jaques (A.I.D) EP14/MH.15.5.35 re IGNITION PLUGS FOR "KESTREL" ENGINES ------------------------------------ With reference to Hs/Wst.6/MA.13.5.35, we do not feel that… | ||
| Scan198 | The testing of Lodge and K.L.G. plugs for 'Kestrel' engines with take-off boost. | ||
| View original record | S/W. To Hs/Wst. from Lp. Copy to Wst. " " By. V6000. Lp.9/LAM.15.5.35. Re: PLUGS FOR "KESTREL" ENGINES WITH 6 lbs. "TAKE-OFF" BOOST. (Hs/Wst.6/MA.13.5.35.). With reference to the above, it was… | ||
| Scan199 | Requesting tests on the ignition plug position in a ramp head cylinder to observe effects on power, detonation, and plug temperatures. | ||
| View original record | Y/6 200 To Hs/Wd. from E. c. Hs. E/Rbr. E/Psn. E.3/HP.16.5.35. re Ramp Head Ignition Plug Position. We should like to have tests made on a ramp head cylinder, moving the sparking plug progressively… | ||
| Scan200 | The repair or replacement of sparking plugs removed from various chassis. | ||
| View original record | WST vLoso Hs. D/BP/WK6/OG17-5-35 Re: Sparking Plugs. We have received from 'K' Depot. 31 Sparking Plugs removed from chassis :- B-41-BN B-181-BL B-140-AH B-102-CR B-125-CW B-144-CR B-136-AH B-34-BN… | ||
| Scan201 | Letter from the Air Ministry regarding comparative in-flight trials of spark plugs for Kestrel V and VI engines. | ||
| View original record | Tel. No. HOLBORN 3434. Any communications on the subject of this letter should be addressed to:- THE SECRETARY, AIR MINISTRY, ADASTRAL HOUSE, KINGSWAY, LONDON, W.C.2. and the following number quoted… | ||
| Scan202 | Confirming the return of plugs that passed testing. | ||
| View original record | 26 000 D/BP. From Hs/Wst. Hs/Wst.5/MA.20.5.35. Replying to your D/BP/WK.6/OG.17.5.35., these plugs have been handed back personally to K/CK as we found them OK on test. Hs/Wst. | ||
| Scan203 | The unsuitability of Lissen sparking plugs for the 20/25 engine due to over-oiling. | ||
| View original record | Y6000. Roy/GEA. From Hs/Wst. Hs/Wst.6/MA.28.5.35. Re. LISSEN SPARKING PLUGS. We have tested these out on a 20/25 chassis and regret to say that they are not suitable for the engine as they badly… | ||
| Scan204 | Proposing a new, centralised maintenance routine for sparking plugs to reduce unnecessary scrap. | ||
| View original record | H/6000. Wor. From Hs. Hs.9/MA.7.6.35. SPARKING PLUGS. We have developed in our electrical section a very efficient routine for the maintenance of sparking plugs which has during the last year saved a… | ||
| Scan205 | Letter from Ethyl Export Corporation regarding the return of a blueprint and a request for K.L.G. plug sections. | ||
| View original record | CABLEGRAMS: ETHYLPORT, LONDON. TELEGRAMS: ETHYLPORT, CHURTON. 16000. ETHYL EXPORT CORPORATION Incorporated in the State of Delaware, U.S.A. with limited liability. ABFORD HOUSE, VICTORIA LONDON, S.W.1… | ||
| Scan206 | Issues with sparking plugs and proposing the centralization of this job. | ||
| View original record | Hs. from Wor. Copy to Hs. from Wor. [crossed out] WST 86001 Wor7/T24.6.35. ---------------- SPARKING PLUGS I have read your interesting note Hs9/MA7.6.35, and I think there is much to be said for what… | ||
| Scan207 | Legal risks of patent infringement concerning the use of Lodge Screened Aero Plugs. | ||
| View original record | V6000. Hs/Wst. from Wor. Wor7/TI.7.35. I have considered the proposal to use Lodge Screened Aero Plugs under indemnity from Messrs. Lodge Plugs Ltd., to which you draw attention in Hs/Wst4/MA.21.5.35.… | ||
| Scan208 | Letter to Lodge Plugs Ltd. regarding patent infringement concerns over screened plugs. | ||
| View original record | V6000. Hs/Wst.1/MA. 2nd July, 1935. Messrs. Lodge Plugs, Ltd., Rugby. For the attention of Mr. Alec M. Lodge. Dear Sir, We beg to refer you to your letter in which you enclosed an indemnity covering… | ||
| Scan209 | Request to make plates to accommodate aero sparking plugs as per drawings EL169 and 170. | ||
| View original record | 86000. RHC. From Hs/Wst. Hs/Wst.2/MA.11.7.35. SPARKING PLUGS. Will you please have four plates each made to our drgs. EL169 and 170 attached to accomodate aero sparking plugs. Hs/Wst. | ||
| Scan210 | Letter from a test pilot and aeronautical consultant regarding an enquiry for Detonindex valves and suggesting the testing of B.G. Plugs. | ||
| View original record | R.H.STOCKEN M.I.Ae.E., M.G.A.P.A.N., R.A.F.O. (TEST PILOT & AERONAUTICAL CONSULTANT) Engine & Aircraft Flying Tests. Ab Initio & Advanced Training given on Aeroplanes & Seaplanes. Dorland House 18-20… | ||
| Scan211 | Decision to fit specific K.L.G. and Lodge sparking plugs for a Kestrep Exp.5 type-test. | ||
| View original record | Y6000. Mr.Mansell A.I.D. From Hs/Wst. Hs/Wst.4/MA.19.7.35. As a result of a discussion I had with Mr.Emtage, R.D.E.3 it has been agreed that we should fit to the Kestrep Exp.5 type-test 12 Lodge… | ||
| Scan212 | Letter declining further testing of a B.G. plug and screen on Kestrel engines. | ||
| View original record | 86000 Hs/Wst.3/MA. 19th July, 1935. R.H.Stocken, Esq., Dorland House, 18-20 Regent Street, London, S.W.1. Dear Sir, Replying to your letter we tested the B.G. plug and screen some considerable time… | ||
| Scan213 | Correspondence regarding a patent for improvements in sparking plugs. | ||
| View original record | S/W. To Hs/WST. Copy to Wor. WST +6000. Db/RWC.11/PH.25.7.35. Sparking Plugs general G.E. & J.W. HEWITSON. Attached is a copy of a letter received from the above gentlemen dealing with a patent they… | ||
| Scan214 | Letter from G. H. J. W. Hewitson proposing a new ignition system design for aeroplane engines. | ||
| View original record | C O P Y. 29, Mansell Road, Greenford, MIDDLESEX. 25th July, 1935. To Messrs. Rolls Royce, Ltd., 15, Conduit St., London, W.1. Dear Sir, Further to my telephone conversation of the 24th inst. I… | ||
| Scan215 | Requesting a drawing for G.E. & J.W. Hewitson sparking plugs. | ||
| View original record | rb 6000. Db/RWC. From Hs/Wst. Hs/Wst.2/MA.6.8.35. G.E. & J.W. HEWITSON SPARKING PLUGS. Replying to your Db/RWC.11/PH.25.7.35., we should be glad if you will send us the drawing referring to the above… | ||
| Scan216 | The dispatch of a drawing for Hewitson sparking plugs. | ||
| View original record | 6000. S/W. Db/RWC.4/PH.7.8.35. To Hs/Wst. from Db/RWC. Copy to Wor. G.E. & J.E. HEWITSON SPARKING PLUGS. ----------------- With reference to Hs/Wst.2/MA.6.8.35. we are sending the drawing referred to… | ||
| Scan217 | Use of new types of sparking plugs for a Kestrel V type test engine. | ||
| View original record | WST x6000. Mr. Platford. c to Mr. Hives/West c to A.I.D W.O. K.5021 Type Test. Aug. 7th. 1935 Kestrel V Type Test Engine No. 5021. Following upon Mr. West's request for the use of new types of… | ||
| Scan218 | Letter confirming receipt of 100 K.L.G. booklets from Messrs. Hunt, Barnard & Co. Ltd. | ||
| View original record | Y6000 Hs/Wst.2/MA. 16th August, 1935. Messrs.Hunt, Barnard & Co.Ltd., Granville Works, Aylesbury, BUCKS. Dear Sirs, We have received safely the 100 K.L.G. Booklets sent to us under cover of your… | ||
| Scan219 | Investigation into the cause of Bentley sparking plug misfiring, theorized to be caused by lead oxide deposits. | ||
| View original record | To Hd. c. to K/KC. c. to EP. Bentley Sparking Plugs. We have been for some time endeavouring to find the cause of Bentley sparking plugs misfiring. In the majority of cases plugs which have been… | ||
| Scan220 | Investigation into misfiring issues with the 850 plug. | ||
| View original record | -2- Hs/Wst.12/KW.16.8.35. The 850 plug has been tested in France with satisfactory results but on recent subsequent tests we had a recurrence of misfiring which we are now investigating. It may be… | ||
| Scan221 | Requesting drawings and specifications for a Sparking Plug Test Rig for the Air Ministry. | ||
| View original record | Hs/Wst from EJJ/JV. [Handwritten: V6000.] [Handwritten: WST] EJJ/JV5/MM7.8.35. RE TEST TACKLE FOR SPARKING PLUGS. --------------------------------- We have received a request from the Air Ministry to… | ||
| Scan222 | Internal request to order two dozen type 850 sparking plugs. | ||
| View original record | r6-000. Roy. From Hs/Wst. Hs/Wst.4/MA.15.8.35. Will you please order for us to order No.54107 two dozen type 850 sparking plugs with gaps set .015" to .018". Hs/Wst. | ||
| Scan223 | Private memorandum regarding sparking plug trouble and obsolete parts for Kestrel S engines at Pembroke Dock. | ||
| View original record | To EP. c. to Lp. Private. Hs/Wst.10/KW.19.8.35. Sparking Plug Trouble at Pembroke Dock. Referring to your EP.12/MH.17.8.35, paragraph 1, page 2, Lodge A2/1 plugs as well as the K.L.G. V7 are obsolete… | ||
| Scan224 | Private memo regarding sparking plugs and fuel requirements for Kestrel X engines. | ||
| View original record | PRIVATE 16000. W/S In c. Hs/Wst EP6/MH.19.8.35 re SPARKING PLUGS ----------------- With further reference to our memo EP12/MH.17.8.35, and in regard to the penultimate paragraph. We should have made… | ||
| Scan225 | Sparking plug trouble at Pembroke Dock, focusing on obsolete and incorrect plug types fitted to 'Singapore' engines. | ||
| View original record | PRIVATE 16000. Hs/Wst EP/Thn13/MH.20.8.35 re SPARKING PLUG TROUBLE AT PEMBROKE DOCK ----------------------------------------- With reference to your memo Hs/Wst.10/KW.19.8.35, we note that Lodge A2/1… | ||
| Scan226 | Patent for improvements in sparking plugs from G.E. & J.E. Hewitson. | ||
| View original record | WST v6000. S/W. To Hs/Wst. from Db/RWC. Copy to Wor. Db/RWC.12/PH.26.8.35. G.E. & J.E. HEWITSON. Sparking Plugs. We would refer you to Db/RWC.11/PH.25.7.35. forwarding you a specification in regard to… | ||
| Scan227 | The conversion of sparking plugs for Merlin engines. | ||
| View original record | Roy. From Hs/Wst. c. to G/MT. c. to D/BP. 86-000 Hs/Wst.3/MA.26.8.35. SPARKING PLUGS. 7752 We are sending into the stores - 48 K.L.G. type 868B and 24 Lodge type X465B sparking plugs. Will you please… | ||
| Scan228 | Evaluating the suitability of Hewitson Sparking Plugs for use in aero engines. | ||
| View original record | 86-000. Db/RWC. From Hs/Wst. Hs/Wst.3/MA.28.8.35. HEWITSON SPARKING PLUGS. Replying to your Db/RWC.12/PH.26.8.35., we have examined the patent specification and drawing and do not consider that there… | ||
| Scan229 | Requesting to post one framed sparking plug drawing. | ||
| View original record | 86000. G/MT. From Hs/Wst. c. to D/BP. Hs/Wst.4/MA.28.8.35. Db/RWC. Will you please arrange to post to one framed sparking plug drawing referring to our memo reference Hs/Wst.3/MA.28.8.35. No charge.… | ||
| Scan230 | Hewitson Sparking Plugs and the return of a provisional specification. | ||
| View original record | 16000. S/W. Db/RWC.8/PH.29.8.35. To Hs/Wst from Db/RWC. Copy to Wor. WST Hewitson Sparking Plugs. We thank you for Hs/Wst 3/MA.28.8.35. and we have informed Messrs. Hewitson accordingly. Would you… | ||
| Scan231 | Cover note for the patent specification of the Hewitson plug. | ||
| View original record | 86 000 Db/RWC. From Hs/Wst. Hs/Wst.2/MA.31.8.35. Herewith as requested patent specification of Hewitson plug. Hs/Wst. | ||
| Scan232 | The unavailability of 850 plugs and advising to arrange a small stock for replacement work. | ||
| View original record | 86000. Hd/SB. From Hs/Wst. Hs/Wst.1/MA.2.9.35. We regret that we have no 850 plugs available although we have a small quantity on order. We suggest you arrange for yourselves and K. to have a small… | ||
| Scan233 | Proposal to test two types of experimental sparking plugs during a 50-hour fuel economy test. | ||
| View original record | x6.000. Mr. Underwood, A.I.D. Hs/Wst.3/MA.2.9.35. K.2635 50 HOUR FUEL ECONOMY TEST. We wish to try out on this test two types of experimental sparking plugs, 12 type 893B (K.L.G.) and 12 type X471B… | ||
| Scan234 | Letter to the Royal Aircraft Establishment requesting the release of blueprints. | ||
| View original record | x6000. Hs/Wst.5/MA. 6th September, 1935. The Chief Superintendent, Royal Aircraft Establishment, South Farnborough, HANTS. Dear Sirs, We should be much obliged if the blue prints referred to in our… | ||
| Scan235 | Secret memo regarding designs for Spectre sparking plug spanners and terminals. | ||
| View original record | WST 86-000 To Hs. from E/JNR. SECRET. E/JNR.2/HP.6.9.35. c. FHS. Hs/Em. Hs/Wst. Spectre Sparking Plugs. We send you herewith:- LeC.4676 showing the sparking plug spanner. The inside of the box spanner… | ||
| Scan236 | Sending used K.L.G. and Lodge spark plugs back to their makers for examination after a 100-hour type-test. | ||
| View original record | V6000. Roy. From Hs/Wst. c. to G/MT. c. to D/BP. c. to Mr.Underwood A.I.D. Hs/Wst.lj/MA.10.9.35. SPARKING PLUGS ex K.5021 TYPE-TEST. We are sending into the stores 12 K.L.G. type 886B sparking plugs… | ||
| Scan237 | Requesting a substantial Yale lock for the experimental sparking plug stock cupboard due to pilfering. | ||
| View original record | H6000. EJJ. From Hs/Wst. Hs/Wst.1/MA.13.9.35. EXPERIMENTAL SPARKING PLUG STOCK CUPBOARD IN ELECTRICAL LABORATORY. We are troubled with pilfering from this cupboard which has a key common to many other… | ||
| Scan238 | Request to manufacture two external plugs for an extra battery on a Horsley aircraft fitted with a Merlin C engine. | ||
| View original record | Y6000 RHC. From Hs/Wst. Hs/Wst.8/MA.17.9.35. EXTERNAL PLUG FOR EXTRA BATTERY ON HORSLEY AIRCRAFT FITTED WITH MERLIN C ENGINE. Will you please have two plugs made to our drg. EL188. Details of small… | ||
| Scan239 | Letter reporting on the failure of Lodge and K.L.G. sparking plugs during a test on a Merlin C.3 engine. | ||
| View original record | V6000. Hs/Wst.3/MA. 20th September, 1935. The Secretary, Air Ministry, Adastral House, Kingsway, London, W.C.2. For the attention of Mr.Foord. R.D.E.2.b. Dear Sir, With reference to your request to… | ||
| Scan240 | Recommendation against using a spring clip to secure a plug in a spanner, suggesting engagement with the plug's screw thread instead. | ||
| View original record | 86000. E. From Hs/Wst. c. to By. LeC.4676. Hs/Wst.1/MA.2.10.35. We strongly recommend some other means be adopted for securing the plug in the spanner for removal purposes, than the spring clip shewn.… | ||
| Scan241 | Letter from the Air Ministry concerning sparking plugs for the Merlin engine. | ||
| View original record | 86800. TEL. NO. HOLBORN 3434. Any communications on the subject of this letter should be addressed to :- THE SECRETARY, AIR MINISTRY, ADSTRAL HOUSE, KINGSWAY, LONDON, W.C.2. and the following number… | ||
| Scan242 | Request to verify the suitability of various types of plugs for Merlin engines prior to flight tests. | ||
| View original record | It is understood that opportunity for making flight tests of various types of plug is likely to occur in the immediate future and it would be appreciated if you could verify early, please, whether the… | ||
| Scan243 | Letter from the Air Ministry regarding the testing and development of sample sparking plugs with integral screening. | ||
| View original record | TEL. No. HOLBORN 3434. Any communications on the subject of this letter should be addressed to :- THE SECRETARY, AIR MINISTRY, ADASTRA HOUSE, KINGSWAY, LONDON, W.C.2. and the following number quoted… | ||
| Scan244 | Inclusion of K.L.G. plugs in a signed contract with the Yugoslav Government. | ||
| View original record | WST Hs. C. Roy. (Struck through) Y6 000 BY/Cgh. 4/G. 30.10.35. With reference to Hs/Wst.6/MA. 23.10.35. and letter received from Lodge Plug Limited, the position is that K.L.G. plugs were included in… | ||
| Scan245 | Letter from the Air Ministry regarding two new types of screened sparking plugs, Lodge X.496 and Lodge X.506, being sent for suitability assessment. | ||
| View original record | TEL. No. HOLBORN 3434. Any communications on the subject of this letter should be addressed to :- THE SECRETARY, AIR MINISTRY, ADASTRAL HOUSE. KINGSWAY, LONDON, W.C.2. and the following number quoted… | ||
| Scan246 | Letter regarding the submission of spark plugs for testing and evaluation. | ||
| View original record | Y6-000. Hs/Wst. K/KC/DPB/7.11.35. Dear Mr. West, Having just returned from a three day visit to Derby without having either the opportunity of a chat to you or of handing to you the enclosed plugs for… | ||
| Scan247 | Letter from the Air Ministry concerning the suitability of two types of radio-screened spark plugs for the Merlin engine. | ||
| View original record | Tel. No. HOLBORN 3434. Any communications on the subject of this letter should be addressed to :- THE SECRETARY, AIR MINISTRY, ADASTRAL HOUSE, KINGSWAY, LONDON, W.C.2. and the following number quoted… | ||
| Scan248 | Request to arrange for a joiner to make three small wooden racks for a sparking plug service bench. | ||
| View original record | 6000. EJJ. From Hs/Wst. Hs/Wst.4/MA.8.11.35. Will you please arrange for the joiner to make us three small wooden racks for oue sparking plug Service bench. We can describe to him the sort of thing we… | ||
| Scan249 | Request to order K.L.G. pressure testing apparatus for aero integral screened plug tests. | ||
| View original record | To EJJ. From Hs/Wst. Y6000 Hs/Wst.6/MJ.8.11.35. AERO INTEGRAL SCREENED PLUG TESTS. Will you please order for us from the K.L.G. Co. for the above tests, one K.L.G. Pressure testing apparatus (foot… | ||
| Scan250 | Request to obtain two dies for cleaning sparking plug threads. | ||
| View original record | To RHC. From Hs/Wst. r6000. Hs/Wst.11/MJ.8.11.35. Will you please obtain for us two dies for cleaning sparking plug threads, one 14 mm. and one 18 mm. thread. Hs/H.E.West. | ||
| Scan251 | Letter to the Air Ministry regarding the suitability of Lodge integral screened plugs for Kestrel and Merlin engines. | ||
| View original record | 86000 Expl. Dept. Hs/Wst.12/MJ. 8th. November, 1935. The Secretary, Air Ministry, Adastral House, Kingsway, LONDON.W.C.2. For the attention of R.D.E.3. Dear Sir, Replying to your letter of the… | ||
| Scan252 | The unsuitability of type X.506 plugs for the E. engine, with details on electrical bench tests. | ||
| View original record | Hs/Wst.12/MJ. -2- 8th. November, 1935. The type X.506 is also unsuitable for the inlet plug on the E. engine and on both C. and E. extends .500" longer than the K.L.G. MS.45. Electrical bench tests on… | ||
| Scan253 | Letter from Rotax Limited requesting details of spark plugs used in aero engines for voltage testing purposes. | ||
| View original record | ROTAX LIMITED AVIATION DEPARTMENT WILLESDEN JUNCTION LONDON N·W·10 TELEPHONE WILLESDEN 2480 (Pte Bch Ex) TELEGRAMS RODYNALITE PHONE LONDON DIRECTORS: PETER F. BENNETT. OLIVER LUCAS. F. H. WALKER. A.… | ||
| Scan254 | Letter detailing the results of aero sparking plug voltage tests for Merlin and Kestrel engines. | ||
| View original record | xL 6000. Hs/Wst.2/MA. 11th November, 1935. Messrs.Rotax, Ltd., Aviation Dept., Willesden Junction, London, N.W.10. Dear Sirs, Replying to your letter of the 8th instant reference VG/LR. you will be… | ||
| Scan255 | Internal order for K.L.G. Pressure Testing Apparatus for integral screened plug tests. | ||
| View original record | Req from EJJ/JV. c to Hs/Wst. WST Order No. 815. x6000 EJJ/JV17/JC12. 11. 35. Re - INTEGRAL SCREENED PLUG TESTS. Please order from The K.L.G. Co.,Ltd., :- 1 - K.L.G. Pressure Testing Apparatus, (foot… | ||
| Scan256 | Letter from the Air Ministry querying the design specifications for radio screened plugs on Kestrel engines. | ||
| View original record | TEL. No. HOLBORN 3434. Any communications on the subject of this letter should be addressed to :- THE SECRETARY, AIR MINISTRY, ADASTRA HOUSE, KINGSWAY, LONDON, W.C.2. and the following number quoted… | ||
| Scan257 | On agreed dimensions for Merlin engine sparking plugs. | ||
| View original record | E. From Hs/Wst. c. to By. r6000. Hs/Wst.10/MA.18.11.35. MERLIN SPARKING PLUGS. We have now succeeded in getting Messrs. K.L.G.& Lodge Plugs, Ltd., to agree regarding the dimensions of sparking plugs… | ||
| Scan258 | Testing of B.G. plugs by the Dutch Air Command and a proposal for a new type. | ||
| View original record | S/W To Hs. from Db. Copy to Wor. By. E.P. [Handwritten annotations] WST H6200. Reeme HOLLAND - B.G. PLUGS. The Dutch Air Command are anxious to try B.G. Plugs in their Rolls-Royce engines, and a set… | ||
| Scan259 | The testing of B.G. plugs for Holland on Kestrel engines. | ||
| View original record | Db. From Hs/Wst. c. to Wor. c. to E. c. to By. c. to EP. 86000. Hs/Wst.3/MA.20.11.35. Re. B.G. Plugs for Holland. Replying to your Db.9/JL.19.11.35., we tried out a set of B.G. plugs some time ago on… | ||
| Scan260 | Invoice from La Bougie B.G. for 12 sample spark plugs with elbows and sleeves for demonstration. | ||
| View original record | LA BOUGIE B. G. R. C. Seine 244.935 B Chèque Postal Paris 1478-16 Société anonyme au Capital de 1.000.000 francs Siège Social : 11, Rue VERGNIAUD — PARIS-13e Télép. : Vaugirard 68-40 lignes Groupées… | ||
| Scan261 | Dispatch of a sample batch of 'B.G.' plugs for testing and a request for a report. | ||
| View original record | S/W Per Bag. 86000. Db/RWC2/JL.28.11.35. To Hs. from Db/RWC. Copy to Wor. E. [crossed out] By. EP. [crossed out] "B.G." PLUGS. With reference to Db9/JL.19.11.35, we have now had a visit from a… | ||
| Scan262 | List of suitable sparking plugs for Kestrel, Buzzard, and Merlin engines. | ||
| View original record | 86000 EP/RDO. From Hs/Wst. Hs/Wst.8/MA.29.11.35. The following is a list of sparking plugs suitable for R.R. Engines. Kestrel engines. Kestrel IB Lodge A2/2, K.L.G. V7/1. Kestrel II S or MS Lodge… | ||
| Scan263 | Internal request to order two specific types of sparking plugs. | ||
| View original record | Roy. From Hs/Wst. 86000. (handwritten) Hs/Wst.1/MA.3.12.35. SPARKING PLUGS. Will you please order for us to order No.54200 - 48 K.L.G. V7/3B plugs and to order No.54317 - 48 Lodge R114 plugs. Hs/Wst. | ||
| Scan264 | Letter to Messrs. K.L.G. Sparking Plugs Ltd. requesting descriptive booklets for foreign buyers. | ||
| View original record | 86000. Hs/Wst.6/MA. 6th December, 1935. Messrs.K.L.G.Sparking Plugs, Ltd., Robinhood Engineering Works, Putney Vale, London, S.W.15. For the attention of Major C.M.Carington. Dear Sir, We wish to… | ||
| Scan265 | Letter to Imperial Airways requesting feedback on the 'Wizard' type sparking plug. | ||
| View original record | Hs/Wst.5/MA. x6000. 7th December, 1935. J.W.Stirling, Esq., Engineer Superintendent, Imperial Airways,ltd., Air Port of London, Croydon. SURREY. Dear Mr.Stirling, I know you have been using for some… | ||
| Scan266 | Letter from Imperial Airways concerning the performance and oiling issues of 'Wizard' spark plugs. | ||
| View original record | Handwritten notes: E/BN B Please note and return when convenient S6000. WTP HS/Wst broken a valve head but was not satisfactory for High Duty Engines. Bn Printed and typed text: IMPERIAL AIRWAYS LTD… | ||
| Scan267 | Letter from an Engineer Superintendent discussing sparking plug oiling and an experiment to diagnose the cause. | ||
| View original record | IMPERIAL AIRWAYS LTD. -2- CONTINUATION No. ES/JWS/MOD/11,140. 9 December 1935 position of the sparking plug hole, which, in some engines, serves as a sump for the surplus oil on the cylinder walls. I… | ||
| Scan268 | Request to prepare H.T. ignition cables with B.G. plugs for testing for the Dutch Air Ministry. | ||
| View original record | RHC. From Hs/Wst. V6-000 [handwritten] Hs/Wst.11/MA.10.12.35. TESTS OF B.G. PLUGS. Will you please have a new set of H.T. ignition cables made for K.385 at Sinfin fitted with the above type plugs… | ||
| Scan269 | Letter discussing the performance and reliability of K.L.G. Wizard sparking plugs in aircraft engines. | ||
| View original record | Copy for - Colonel Darby. Mr.Staple. Extra copy for Rolls-Royce Ltd. 86001a C.E. NLH/LGH/24520. 21st December, 1935. (Dict. on 20th.) A.J.Rowledge, Esq., Messrs. Rolls-Royce Limited, DERBY. Dear… | ||
| Scan270 | The performance of 14 m.m. Wizard spark plugs in various aircraft engines. | ||
| View original record | -2- A.J.Rowledge, Esq. engines at any rate, prevent the fusion of the deposits, which has actually proved to be the case. To my mind this 14 m.m. Wizard plug is much superior to the 18 m.m. Wizard… | ||
| Scan271 | The performance and testing of various spark plugs in high-duty aircraft engines. | ||
| View original record | -5- A.J.Rowledge, Esq. experiencing similar trouble in this type test other Wizard plugs were added and the type test was completed without trouble from the Wizards with the exception that one had to… | ||
| Scan272 | Letter to A.J. Rowledge regarding the development of a new engine and the potential use of Wizard sparking plugs. | ||
| View original record | -4- A.J.Rowledge, Esq. that it is likely that in the near future things are going to be made ever so much worse for sparking plugs in general and therefore I propose to go on with the development of… | ||
| Scan273 | Letter to The Breeze Corporation Inc. inquiring about radio ignition shielding for aero engines. | ||
| View original record | V6000. Hs/Wst.7/MA. 21st December, 1935. The Breeze Corporation Inc. 24-46 Sixth Street, Newark, N.J. U.S.A. Re. Radio Ignition shielding for aerocables. Dear Sir, We are very interested in your… | ||
| Scan274 | Cancelling instructions for starter plugs and sockets for prototype Merlin engines. | ||
| View original record | r6000. RHC. From Hs/Wst. c. to Hs/Dor. (Hucknall) Hs/Wst.4MA.30.12.35. The Air Ministry have now informed us that they do not require us to supply any more starter plugs and sockets with prototype… | ||
| Scan275 | The urgent need for flight tests on Lodge and K.L.G. sparking plugs for the Merlin engine. | ||
| View original record | v6-000 Hs/Dor. From Hs/Wst. (Hucknall) c. to Mr.Underwood A.I.D. Hs/Wst.1/MA.31.12.35. MERLIN SPARKING PLUGS. As soon as possible we want to do some sparking plug tests in the Merlin-Horsley with some… | ||
| Scan276 | The fitting and servicing of sparking plugs for the Merlin Engine in a Horsley aircraft. | ||
| View original record | To Hs/Wst. c. to Mr. Underwood (A.I.D). Hs/Dor.1/EKB. 2. 1. 36. [Handwritten] WST See me 86-000 MERLIN SPARKING PLUGS. Regarding your memo ref: Hs/Wst.1/MA. 31.12.35, if you will let us have the… | ||
| Scan277 | Request for one set of inlet plug ignition cables to be made for a Merlin E engine. | ||
| View original record | 16000. RHC. From Hs/Wst. c. to Hs/Lov. Hs/Wst.2/MA.10.1.36. MERLIN E SPARKING PLUGS. Will you please have one set of inlet plug ignition cables made up for Merlin E with the ends made to suit the… | ||
| Scan278 | The change in finish for Bentley sparking plugs to cadmium plated. | ||
| View original record | G/MT. From Hs/Wst. V6000 Hs/Wst.5/MA.14.1.36. Will you please note that Bentley sparking plugs will eventually be cadmium plated instead of a blue finish and plugs should not therefore be queried when… | ||
| Scan279 | Order for one dozen aero sparking plug setting gauges. | ||
| View original record | 86000 To Roy. From Hs/Wst. Hs/Wst.1/MJ.16.1.36. Please order for us to Order No.54001 - One Doz. Aero Sparking Plug Setting Gauge for the gaps .012 to .015". These can be obtained either from Messrs.… | ||
| Scan280 | Modifications to the Merlin 'E' engine's sparking plug connections and housing, including blueprints. | ||
| View original record | To ~~B.Y.~~ Copy to RHC. Hs/Wst. Handwritten: 86000. NST MERLIN 'E' ENGINE. Please receive herewith two blueprints of the following:- DES.2794 - Modifications to Sparking Plug Connections and Housing… | ||
| Scan281 | Obtaining a new wireless plug for Chassis 32-EX. | ||
| View original record | 86000. RHC. From Hs/Wst. Hs/Wst.4/MA.18.1.36. Re. Chassis 32-EX. We have now obtained a new wireless plug for this chassis and we shall be glad if you will arrange for it to be inserted as soon as… | ||
| Scan282 | Trouble with sparking plugs on Mark IV 'Osprey' machines at Lee-on-the-Solent. | ||
| View original record | S/W. r6000. Lp.12/LAW.21.1.36. To EP from Lp. Copy to Wor. " " Hs/Wst. "OSPREY" MACHINES - LEE-ON-THE-SOLENT. Coastal Area are somewhat agitated about the trouble which has been experienced with… | ||
| Scan283 | Sparking plug trouble on an 'Osprey' aircraft, leading to engine cutting out. | ||
| View original record | V6 000 H/P. C.P. Hs/Wst re "OSPREY" AIRCRAFT - SPARKING PLUG TROUBLE With reference to your Lp.12/LAM.21.1.36, the complaint appears to have emanated in regard to an "Osprey" aircraft which was… | ||
| Scan284 | Different spark plug types and performance issues from various locations. | ||
| View original record | -2- EP2/WH.23.1.36 Against this Hs/Wst points out that the plug he is now recommending is the K.L.G.V7/3 type plug, which he considers - according to tests made - more suitable to deal with this… | ||
| Scan285 | Trouble with sparking plugs on Merlin engines due to leaded fuel and proposing a solution. | ||
| View original record | E. From Hs/Wst. c. to F/Bn. c. to By. 86000. Hs/Wst.7/MA.27.1.36. SPARKING PLUGS ON MERLIN ENGINES. We are continually having trouble with sparking plugs on Merlin engines due to the threads picking… | ||
| Scan286 | Requesting test results for B.G. Plugs, initially tested due to interest from the Dutch Government. | ||
| View original record | S/W To Hs. from Db. Copy to Wor. r6000. Db2/JL.1.2.36. WST see me You will remember we sent you some time ago a set of B.G. Plugs for test, as the Dutch Government were interested in same. We are now… | ||
| Scan287 | Testing B.G. plugs on a Kestrel engine, suggesting a full throttle test before a final report. | ||
| View original record | W/S. Db. From Hs/Wst. c. to Wor. 16000 Hs/Wst.8/MA.3.2.36. Re. B.G. PLUGS. In reply to your Db.2/JL.1.2.36., we have run 41 hours on the above type plugs on a Kestrel engine 40 hours of which was run… | ||
| Scan288 | Increased complaints of sparking plug trouble on Bentley cars compared to other models. | ||
| View original record | Hs. c. W/S H. r 6000. Hd/SB9/HR.6.2.36. WST see me re BENTLEY SPARKING PLUGS. ------------------------- We attach hereto a copy of H7/H. 5.2.36., in reference to the above. We would like your comments… | ||
| Scan289 | Sparking plug issues and misfiring in Bentley Engines related to deposits left by different types of fuel. | ||
| View original record | COPY. S/W - Hd. H7/H.5.2.36. re SPARKING PLUGS. Bentley Engines. ---------------- With reference to B.51-DK., E. W. Boughton, and B.159-DK, Mrs. G. T. Mills, we note that following upon visits in the… | ||
| Scan290 | Pre-ignition and mica insulation flaking issues with Bentley sparking plugs. | ||
| View original record | V6000 Hd. From Hs/Wst. c. to H. c. to K. Hs/Wst.3/MA.10.2.36. BENTLEY SPARKING PLUGS. With reference to your Hd/SB.9/HR.6.2.36., with copy of H.7/H.5.2.36., attached. We have examined the plugs… | ||
| Scan291 | Letter from AIRCO LIMITED regarding a Radio Screening Harness for engine testing. | ||
| View original record | DIRECTORS, Captain R. H. STOCKEN, M.I.Ac.E.,R.A.F.O. G. S. WALKLEY. T. A. CLAYTON. AIRCO LIMITED 18/20 LOWER REGENT STREET, LONDON S.W.1. Telephone. WHItehall 8845/6. 8863. Telegrams and Cables.… | ||
| Scan292 | Request to return Merlin E.5 type-test sparking plugs to Lodge and K.L.G. for inspection. | ||
| View original record | Roy. From Hs/Wst. c. to G/MT. c. to D/BP. c. to A.I.D. 86000. Hs/Wst.1/MA18.2.36. Re Merlin E.5 type-test sparking plugs. Will you please arrange to return the following plugs removed from the above… | ||
| Scan293 | Letter from Imperial Airways regarding the performance of K.L.G. Wizard Sparking Plugs. | ||
| View original record | IMPERIAL AIRWAYS LTD. TELEGRAMS: IMPAIRLIM, LONDON. TELEPHONE: VICTORIA 2211. AIRWAY TERMINUS, VICTORIA STATION, LONDON, S.W.1. (handwritten) rlooo, C.E. HLH/LT/3802. 22nd February, 1936. - West,… | ||
| Scan294 | Letter from Chief Engineer H.L. Hall to a Mr. West, proposing a lunch meeting to discuss ignition troubles in modern high-duty engines. | ||
| View original record | -2- - West, Esq. I should be very pleased to meet you at lunch one day when you are in London and to discuss the subject of the ignition troubles which are said to be prevalent in modern high-duty… | ||
| Scan295 | Letter to Imperial Airways regarding a 'Wizard' plug sample and a proposed meeting. | ||
| View original record | γ r6000. Expl. Dept. Hs/Wst.1/MJ. 24th. February, 1936. H.L. Hall Esq., Imperial Airways Ltd., Airways Terminus, Victoria Station, LONDON.S.W.1. Dear Mr. Hall., Replying to your letter of the… | ||
| Scan296 | The difficulties of using bottom-seated sparking plugs on Merlin engines and a proposed solution. | ||
| View original record | WST seeme Y6000 Hs/Wst. c. Hs. By. E/Bn. E/Fsn. E.4/HP.24.2.36. Sparking Plugs on Merlin Engines. Referring to your memo Hs/Wst.7/MA.27.1.36, the proposal to use bottom seated plugs is rather… | ||
| Scan297 | Copy of a letter from the Royal Air Force regarding the service life and maintenance of K.L.G. V7/3B sparking plugs in an Osprey aircraft's Kestrel V engine. | ||
| View original record | 86001a Hs/Wst EP/Thn5/MH.24.2.36 COPY OF LETTER FROM HEADQUARTERS,COASTAL AREA,ROYAL AIR FORCE, LEE-ON-SOLENT,HANTS. DATED FEBRUARY, 1936. REF. CA/3323/5/E 24 K.L.G.V7/3B Sparking Plugs in "Osprey"… | ||
| Scan298 | Incorrect spares and tools, specifically the spark plug gap gauge and tappet adjustment tool, for the 4 1/4 Litre Bentley. | ||
| View original record | 86-001 EP5/MH.25.2.36 c.c. Mr/NW Hs/Wst re 4 1/4 LITRE BENTLEY - SUITABLE SPARES, TOOLS, ETC. ------------------------------------------------- We find that the above chassis are now being turned out… | ||
| Scan299 | The unsuitability of the existing sparking plug gap setting gauge on the 4 1/4 litre Bentley. | ||
| View original record | r6500 To BF. From Hs/Wst. c.c. to EP. c.c. to E. c.c. to JLR. Re. Sparking Plug Gap Setting Gauge on 4 1/4 litre Bentley. With reference to EP.5/WH.25.2.36, we have looked into the question of the gap… | ||
| Scan300 | Letter to Airco Ltd. regarding test results for B.G. Sparking Plugs, noting a 'Pin holed' insulation fault. | ||
| View original record | Handwritten: J 86550' Expl. Dept. Hs/Wst.4/MJ. 27th. February, 1936. Your Ref: RHS/CC/A. Messrs. Airco Ltd., 18-20, Lower Regent Street, LONDON S.W.1. Dear Sirs, With reference to your letter of the… | ||
| Scan301 | Requesting a Yale lock for a sparking plug cupboard due to ongoing pilfering. | ||
| View original record | To EJJ. From Hs/Wst. Hs/Wst.5/MJ.27.2.36. Some time ago we requested a Yale lock for our metal Sparking Plug cupboard but we regret to say that this has not yet been received. We are still suffering… | ||
| Scan302 | Letter from AIRCO Limited regarding tests on B.G. Sparking Plugs and communication with their Paris Factory. | ||
| View original record | 86000, DIRECTORS. Captain R. H. STOCKEN, M.I.Ae.E.,R.A.F.O. G. S. WALKLEY. T. A. CLAYTON. AIRCO LIMITED 18/20 LOWER REGENT STREET, LONDON S.W.1. Telephone. WHItehall 8845/6. 8863. Telegrams and… | ||
| Scan303 | Letter from Ethyl Export Corporation regarding the testing of a type 300A-1 H-T sparking plug. | ||
| View original record | CABLEGRAMS: ETHYLPORT, LONDON. TELEGRAMS: ETHYLPORT, SOWEST. r6 000 ETHYL EXPORT CORPORATION Incorporated in the State of Delaware U.S.A. with limited liability. THAMES HOUSE, MILLBANK LONDON, S.W.1… | ||
| Scan304 | Letter from G.M.S. Plugs concessionaires to Bentley Motors requesting feedback on spark plug tests. | ||
| View original record | H.6-850 G.M.S. PLUGS "FIRING SURFACE"—NOT firing points Sole concessionaires: CRECAR, MORGAN & Co. Ltd. 172, BUCKINGHAM PALACE ROAD, LONDON, S.W.1. DIRECTORS: Lieut. Col. R. CRERAR. O.B.E. F.W.… | ||
| Scan305 | Letter to Messrs. Crerar, Morgan & Co. Ltd. regarding the unsuitability of their H.S. type sparking plugs for Bentley engines. | ||
| View original record | 862500. Expl. Dept. HS/Wst.3/MJ. 4th. March, 1936. Messrs. Crerar, Morgan & Co. Ltd., 172, Buckingham Palace Road, LONDON, S.W.1. Dear Sirs, Replying to your letter of the 3rd.inst., referring to your… | ||
| Scan306 | Letter from Crerar, Morgan & Co. Ltd. regarding the performance of their G.M.S. spark plugs with leaded fuel. | ||
| View original record | G.M.S. PLUGS "FIRING SURFACE" — NOT firing points Sole concessionnaires? CRERAR, MORGAN & Co. LTD. 172, BUCKINGHAM PALACE ROAD, LONDON, S.W.1. DIRECTORS: Lieut. Col. R. CRERAR. O.B.E. F.W. MORGAN,… | ||
| Scan307 | Customer complaint about faulty sparking plugs for chassis GLJ-35, which were replaced and sent for testing. | ||
| View original record | Hs/Wst. 86 000 Hd/SB21/HR.5.3.36. Robert H. Butler, Esq. re CHASSIS NO. GLJ-35. -------------- The above Owner reports that he has had to change the sparking plugs on his car but he does not give any… | ||
| Scan308 | Response to a report on the condition of a 'Demon' K.4498 aircraft's Kestrel engine, discussing bracing wires and sparking plugs. | ||
| View original record | Hs/Wst 86000 EP19/MH.13.3.36 re "DEMON" K.4498 - KESTREL V.3725 FROM No. 604 SQUADRON - NOW AT HUCKNALL We were rather concerned to receive your report on the condition of the above, referred to in… | ||
| Scan309 | Sent to Hucknall with a blueprint detailing the dimensions for a plug to be fitted in the Merlin E engine. | ||
| View original record | To Dor (Hucknall) r6-000 Hs/CAP.12/JH.16.3.36. We are sending you herewith, a blue print giving the dimensions of the type of plug to be fitted in the Merlin E engine. This is to enable you to confirm… | ||
| Scan310 | Request for test results on B.G. plugs, advising caution in the response to prevent use for publicity. | ||
| View original record | S/W x6000. Db5/JL.17.3.36. To Wd. from Db. WD Copy to Wor. Hs. EP. You will remember we sent you some B.G. plugs for test. We are now asked to state whether you found them satisfactory. The firm also… | ||
| Scan311 | Follow-up request for test results on B.G. plugs, cautioning against their use for publicity purposes. | ||
| View original record | S/W To Hd. from Db. Copy to Wor. Hs. EP. r6000. Db5/JL.17.3.36. You will remember we sent you some B.G. plugs for test. We are now asked to state whether you found them satisfactory. The firm also ask… | ||
| Scan312 | Testing of B.G. sparking plugs for Kestrel engines. | ||
| View original record | rl 6000 To Db. c. to Wor. c. to EP. Hs/Wst. S/JH. 24.3.36. B.G. Sparking Plugs. Replying to your Db5/JL.17.3.36. We have tested several sparking plugs sent to us for Kestrel engines, and find them to… | ||
| Scan313 | Installation inspection of type R.868 Integral Screened Sparking Plugs on a Merlin-Horsley engine. | ||
| View original record | To Hs/Wst. W.S.T 6-500. Dor/Cdy.1/EKB. 24. 3. 36. With reference to Hs/CAP.12/JH. 16. 3. 36 regarding the installation of type R.868 Integral Screened Sparking Plug, we have inspected the installation… | ||
| Scan314 | Investigation into the excessive use and expenditure of sparking plugs for aero engine test beds. | ||
| View original record | Hs/Wst r6000. EP/Thn5/MH.27.3.36 re SPARKING PLUGS USED FOR AERO ENGINE TEST BEDS ----------------- We are astounded this morning, on investigation, to find that during the past month we have used… | ||
| Scan315 | Letter from French spark plug manufacturer LA BOUGIE B. G. regarding test results and future collaboration. | ||
| View original record | LA BOUGIE B. G. R. C. Seine 244.935 B Chèque Postal Paris 1478-16 Société anonyme au Capital de 1.000.000 de francs Siège Social: 11, Rue VERGNIAUD - PARIS-13e Bureaux et Ateliers: 3, IMPASSE THORETON… | ||
| Scan316 | Letter responding to a query about the status of sparkling plugs undergoing engine tests. | ||
| View original record | r6000. Hs/Wst.7/JH. 2nd April, 1936. Messrs. La Boughie B. G. 3, Impasse Thoreton, Paris. For the attention of Mons. Kowalensky. Dear Sirs, We beg to reply to your letter of the 31st of March, and… | ||
| Scan317 | The order of sparking plugs for a Kestrel XVI engine. | ||
| View original record | r6000. To Roy. Hs/Wst.19/JH. 2.4.36. Kestrel XVI Sparking Plugs. Please order for us to order No. 54202 :- 48 KLG. 893.BLR plugs. 12 Lodge X471B plugs. Hs/Wst. | ||
| Scan318 | Appropriate spark plugs for Kestrel XVI engines intended for Yugoslavia. | ||
| View original record | MR. c. Hs. c. Hs/Lov. o. Roy. WST r6500 BY/Cgh.8/C.8.4.36. KESTREL XVI. ENGINES FOR YUGOSLAVIA. With reference to EP.17/EG.2.4.36. K.L.G. V.9/1.B. are the latest type which have been actually tested… | ||
| Scan319 | Letter from French spark plug manufacturer B.G. regarding plug tests and a presentation to the Dutch Government. | ||
| View original record | LA BOUGIE B. G. R. C. Seine 244.935 B Chèque Postal Paris 1478-16 Société anonyme au Capital de 1.000.000 de francs Siège Social : 11, Rue VERGNIAUD - PARIS-13e Télép. : Vaugirard 68-40 Télég. :… | ||
| Scan320 | Requisition list for apparatus required for servicing sparking plugs at Hucknall. | ||
| View original record | To Dor. ~6000. Hs/Wst.17/JH.16.4.36. Re Sparking Plug Servicing at Hucknall At your request we have been investigating the most suitable apparatus for the above, and we now suggest you requisition for… | ||
| Scan321 | Procedure for conducting sparking plug voltage tests on Merlin engines at high altitudes. | ||
| View original record | r 6000. To Dor.(Hucknall). c. to E. c. to A.I.D. (Mr. Underwood) Hs/Wst.1/JH. 23.4.36. Sparking Plug Voltage Tests on Merlin Engines at High altitudes. We have now the apparatus available to enable… | ||
| Scan322 | Concluding remarks on tests for magneto development for high altitudes on the Merlin engine. | ||
| View original record | -2- Hs/Wst.1/JH.23.4.36. joint is well insulated and tested before flight. The results of these tests will be awaited with interest as all magneto development for high altitudes on the Merlin hangs on… | ||
| Scan323 | Tests of various spark plugs for the 25/30 HP chassis. | ||
| View original record | TO HX. c. to LY. c. to DY. c. to Wst. cc to Lmdk. cc to Gypgld v6000. HS/GR.6/JH. 24.4.36. 25/30 Sparking Plugs. The following figures are the result of tests carried out on 21-G-IV and GUL-20… | ||
| Scan324 | Insulation trouble on Bentley K.L.G. 765A plugs, leading to a very short lifespan. | ||
| View original record | (2) HS/GR.6/JH. 24.4.36. This type of insulation gave trouble on the Bentley K.L.G. 765A plugs, the life of a plug being very short. The proposed modification is being submitted by Hs/Wst. to both… | ||
| Scan325 | Notification about an R.A.E. report on tests of B.G. screened sparking plugs being available in the library for inspection. | ||
| View original record | To Hs. Hs/Wst. Hs/Lox. [Strikethrough] r6000. [Handwritten] WST [Handwritten] E/Bn./TGD.3/MN.30.4.36. A copy of R.A.E. Report No. E & I,953 relating to "Tests on B.G. screened sparking plugs, types… | ||
| Scan326 | Report from a tester at Hawker's, Brooklands regarding fitting issues with Lodge sparking plugs and K.L.G. screens. | ||
| View original record | 26000. W ST Hs/Wst EP/RDO.7/MH.2.5.36 COPY OF REPORT FROM TESTER LOMAS AT HAWKER'S,BROOKLANDS,DATED 27.4.36 re K.L.G. M.S.V.1 SCREENS & LODGE A.5.B SPARKING PLUGS… | ||
| Scan327 | Characteristics of 14mm aero sparking plugs, attaching relevant curves. | ||
| View original record | To E. r6000. Hs/Wst.11/JH.4.5.36. Sparking Plug Characteristics. In accordance with out discussion together with the B.T.H. representatives on the question of sparking plugs, we attach herewith 2… | ||
| Scan328 | Graph showing the volt-gap characteristics of K.L.G. aero plugs at room temperature. | ||
| View original record | DRG / JMCCT/B SWINDON VOLT - GAP CHARACTERISTICS OF AERO PLUGS AT ROOM TEMPERATURE VOLTS (PEAK) 12,000 10,000 8,000 6,000 4,000 2,000 0 GAP (INS) .005 .010 .015 .020 .025 .030 K.L.G. V.14.B. K.L.G.… | ||
| Scan329 | Graph showing the volt-gap characteristics of two different aero plugs at room temperature. | ||
| View original record | SWINDON ELECTRICAL AREA VOLT - GAP CHARACTERISTICS OF AERO PLUGS AT ROOM TEMPERATURE VOLTS (PEAK) 12,000 10,000 8,000 6,000 4,000 2,000 GAP (INS) 0 .005 .010 .015 .020 .025 .030 K.L.G. V14/B K.L.G.… | ||
| Scan330 | Clarifying a misunderstanding over the procedure for supplying replacement sparking plugs for a Fairey 'Battle' aircraft. | ||
| View original record | x6000. Mr. Underwood. Dor/Hny.1/MH. 4.5.36. A.I.D. Inspector-in-Charge. c. to RWS/CMP. c. to Hs/West. WST SPARKING PLUGS FOR FAIREY 'BATTLE'. RELEASE NOTE RV.107. We issued instruction from this dept.… | ||
| Scan331 | Internal order for various pieces of electrical equipment for spark plug servicing at Hucknall. | ||
| View original record | 86000. Req from EJJ/JV c to Hs/Wst. Order No.915 EJJ/JV4/MM7.5.36. RE: SPARKING PLUG SERVICING AT HUCKNALL. Please order:- 1 - 1/8 HP Klaxon Synchronous Electric Motor, wound suitable for 250 volts,… | ||
| Scan332 | Letter to Messrs. La Bougie regarding the completion of 110 hours of running tests on B.G. plugs in a Kestrel engine. | ||
| View original record | Hs/Wst.5/JH. V6000. 7th May, 1936. Messrs. La Bougie, B.G. 3, Impasse Thoreton, Paris. Dear Sirs, With further reference to our letter of the 2nd of April, reference Hs/Wst.7/JH., we have now… | ||
| Scan333 | Return of 24 B.G. sparking plugs to the makers in France after testing. | ||
| View original record | r6000. To D/BP. c. to G/Mt. Hs/Wst.4/JH.7.5.36. We are sending into the Stores 24 B.G. sparking plugs for return to the Makers in France, Messrs. La Bougie B.G. 3, Impasse Thoreton, Paris. Their… | ||
| Scan334 | Advice note and inspection certificate for 48 Lodge sparking plugs. | ||
| View original record | Telegrams: "LODGE, RUGBY." Telephone No.: RUGBY 276 (2 lines). COPY FOR CONSIGNEE. No. A2079 8 6000 Lodge Plugs Limited, AIRCRAFT DEPARTMENT, Rugby. Messrs. Rolls-Royce Limited, Nightingale Road,… | ||
| Scan335 | The results of sparking plug voltage tests on a Merlin 'C'.15 engine. | ||
| View original record | WST V6000 see me To Hs/Wst. Dor/Dsby.1/MH. 13.5.36. SPARKING PLUG VOLTAGE TESTS ON MERLIN 'C'.15 ENGINE. Attached is a statement of figures obtained on the first test. At high altitudes, adjusting the… | ||
| Scan336 | Sparking plug voltage test results for a Merlin 'C'.15 engine at various altitudes. | ||
| View original record | SPARKING PLUG VOLTAGE TESTS MERLIN 'C'.15. Sparking Plug: LODGE A14/D1. Set at .015". Cylinder: 'A' Side. No.1. Magneto Contact Breaker. Set at .012". Length of Air Gap. Altitude. Air. Temp. Glycol… | ||
| Scan337 | Engine cutting out at full boost due to faulty K.L.G. spark plugs at Handley Page Ltd. | ||
| View original record | WST 76000. -BY- c. Hs/Wst Mr Underwood (A.I.D) EP/RDO.12/MH.15.5.36 We give below copy of a report received from our tester Bate at Messrs.Handley Page Ltd., Radlett Aerodrome, dated 14.5.36 .- "Re… | ||
| Scan338 | Translated letter from 'La Bougie' 'B.G.' of Paris, concerning the performance of their sparking plugs in a Kestrel engine. | ||
| View original record | Translation Letter from "La Bougie" "B.G." of Paris. V6000. Sn. [STAMP: 19 MAY 1936] May 15th 1936 For Mr West's attention Dear Sirs, We are much [crossed out] obliged for your letter of the 7th… | ||
| Scan339 | Letter from French spark plug manufacturer LA BOUGIE B. G. concerning spark plug service life. | ||
| View original record | LA BOUGIE B. G. R. C. Seine 244.935 B Chèque Postal Paris 1478-16 Société anonyme au Capital de 1.000.000 de francs Siège Social : 11, Rue VERGNIAUD - PARIS-13e Télép. : Vaugirard 68-40 Télég. :… | ||
| Scan340 | The incompatibility of Lodge A.5.B sparking plugs with K.L.G. screened caps and the solution. | ||
| View original record | To EP/RDO. c. to Bv. 86000. HS/Wst.20/JH.18.5.36. With reference to your complaint that the Lodge A.5.B. sparking plug will not fit the K.L.G. screened caps, we have investigated the matter and find… | ||
| Scan341 | Letter from Lodge Plugs Limited responding to a complaint about the fitment of K.L.G. screens on A5B plugs. | ||
| View original record | Telephone, 276 RUGBY (2 lines) Established 1904 Telegrams, 'LODGE, RUGBY' Lodge Plugs Limited, Rugby. X 6000. Messrs. Rolls-Royce Ltd., D E R B Y. Your Ref. Hs/Wst.25/JH. Our Ref. BH/EW. Date 19 May… | ||
| Scan342 | The failure of K.L.G. spark plugs and the recommendation to standardize Lodge A.5B plugs for Kestrel engines. | ||
| View original record | Mr. Underwood, A.I.D. c. EP. c. Hs/Wst. WST r6000. BY3/W.19.5.36. "KESTREL" ENGINES IN HANDLEY PAGE MACHINES. RE :- SPARKING PLUGS. Referring to EP/RDO.12./MH.15.5.36, it would appear from our Tester… | ||
| Scan343 | Ignition plug issues and alternatives for 'Kestrel' engines in service. | ||
| View original record | Hs/Wst 86000. EP12/MH.25.5.36 re IGNITION PLUGS FOR "KESTREL" ENGINES IN SERVICE --------------------- We recently received a report from our tester Bate at Messrs.Handley Page Ltd (where "Heyford"… | ||
| Scan344 | Letter replying to correspondence regarding issues with faulty V7/3B sparking plugs and their replacement. | ||
| View original record | COPY Mr. Platford c/o. Handley Page Ltd., Colney St. Aerodrome, St. Albans. Re-Your letter EP.12/MH.21.5.36.re:Sparking Plugs. There have been a considerable number of V7/3B plugs issued here, approx.… | ||
| Scan345 | Issues with Kestrel Engine sparking plugs and an agreement with K.L.G. for replacements. | ||
| View original record | To EP. c. to By. c. to E. 86000. Hs/Wst.8/JH. 26.5.36. Kestrel Engine Sparking Plugs. Replying to your EP12/MH. 25.5.36. we do not consider that you will have any further trouble with KLG. V7/3B plugs… | ||
| Scan346 | Fulfillment of an order for spark plug servicing at Hucknall. | ||
| View original record | Hs/Der. from EJJ/JV. c to Hs/Wst. WST Order No.915. 86000. EJJ/JV18/JC28.5.36. Re - SPARKING PLUG SERVICING AT HUCKNALL. Will you please note that we have dealt with all the items on your Dor.1/EKB.… | ||