Rolls-Royce Archives
| Identifier | Entry | ||
| Scan001 | Letter from CJ to R. enclosing a newspaper cutting from 'The Times' about the new Hispano-Suiza. | ||
| View original record | To R. from CJ. Copy to Ba. " " Hs. " " Wor. " " By. " " Da. CJ/JS3/D4.10.20. My dear R., I am enclosing herewith for your information an article from "The Times" of October 2, regarding the new… | ||
| Scan002 | Newspaper article from The Times reviewing the new 32-135 HP Hispano-Suiza car. | ||
| View original record | (FROM OUR OWN CORRESPONDENT) THE TIMES Saturday, Oct. 2, 1920. A 32-135 H.P. CAR. THE NEW HISPANO-SUIZA. (BY OUR MOTORING CORRESPONDENT.) What does the ordinary experienced motorist expect from an… | ||
| Scan003 | Comparative review of competitor cars from the Olympia Show. | ||
| View original record | To R. from Da. c. to CJ. c. to Wor. c. to En. c. to Hs. c. to EFC. X4214 Dal/AH11.11.20. Whilst at the Olympia Show I had a short run on each of the following cars :- X.4214. HISPANO-SUIZA X.441.… | ||
| Scan004 | Suggesting the acquisition of a Hispano Suiza car for competitive analysis. | ||
| View original record | W/S. BJ. from Hs. X4214 Hs1/LG13.6.23. HISPANO SUIZA. Referring to the attached ref. Cxl2/CWl1.6.23. We have not had an Hispano Suiza car through our hands. We suggest it might be policy to obtain… | ||
| Scan005 | Secret memorandum on the urgent need to fit front wheel brakes, suggesting the acquisition of a competitor's Hispano car for comparison. | ||
| View original record | To R. from Hs. c. to CJ. c. to RK. X4214 S E C R E T. E.A.C. ETC. FRONT WHEEL BRAKES. Hs/LG27.9.23. 9940 X.4628 X.1746 X.4214 X.4609. As it would appear, fitting the front wheel brakes as standard on… | ||
| Scan006 | Secret memo regarding arrangements to test four-wheel brakes on a Hispano Suiza car. | ||
| View original record | S E C R E T. To Hs. from CJ. Four Wheel Brakes. Referring to your Hs5/LG27/9/23, Mr.Cowen reports that Barkers could arrange for you to try a Hispano Suiza. If you want to try it at once and would… | ||
| Scan007 | Confidential memo requesting to arrange a self-driven test of a Hispano car to assess its system. | ||
| View original record | X4214 To C. from Hs. CONFIDENTIAL. Hs1/LG4.10.23. HISPANO CAR. X1559 X4214 We have heard from CJ. that you could arrange for us to try a Hispano Car through Messrs. Barkers. For the test to be of any… | ||
| Scan008 | Internal memorandum detailing a negative assessment of a competitor's car, the Isotta-Fraschini. | ||
| View original record | To CJ. from R. c. to BJ. HS. X4214 R5/M18.10.23. RE. ISOTTA-FRASCHINE X.4214 X.4609 This car is a very poor one and I suggest we well it before we soil it. The trouble appears to be with the head of… | ||
| Scan009 | Communication regarding the delivery of an Isotta Fraschini car for sale and an inquiry about a Hispano car. | ||
| View original record | W/S. C. from Hs. X.4214. Hs3/LG23. 10.23. ISOTTA FRASCHINI X.4214 X.4609 We will let you have this car in London early next week, for you to sell it. We are very anxious to know what promises you have… | ||
| Scan010 | Need to acquire a modern Hispano car for testing purposes. | ||
| View original record | X4214 To B.J. from Hs. c. to F.H. c. to C. Hs3/LG31.10.23. HISPANO CAR. X4214 / X9940 X.4609 We attach an extract from R's memo. ref. E4/M18.10.23. Also another letter we have received from Da. It… | ||
| Scan011 | Extract discussing 8-cylinder in-line engines and competitor 'Hispano'. | ||
| View original record | Extract from E4/M18.10.23 :- *Mr. Hives is quite sensible in suggesting "Hispano" but I was very interested in 8 cylinders, in line, and should still like to see a good specimen of this type if anyone… | ||
| Scan012 | Potential acquisition and testing of a competitor's Hispano car. | ||
| View original record | To Hs. from Da. Dal/M29.10.23. Mr. Hardy and I went to look at the Hispano car at Barkers last week, but we were not able to try it as it was not in a runnable condition. Mr. Royce wanted us to, and… | ||
| Scan013 | Proposal to purchase a used 1923 Hispano Suiza open touring car from a retailer as an alternative to waiting for a new one. | ||
| View original record | S/W X4214 C13/06.11.23. Re Hispano Suiza. Hs3/LG31.10.23. As I presume it will be too long for you to wait for a new Hispano Suiza, do you think it would be suitable for your purpose if we were to… | ||
| Scan014 | Potential purchase of a Hispano Suiza car, requesting a test drive beforehand. | ||
| View original record | W/S. C. from Hs. X4214 Hs2/LG7.11.23. HISPANO SUIZA. With reference to your C13/C6.11.23. We think the car described in your memo. would probably be suitable, but before the car is purchased, we… | ||
| Scan015 | Trial run report comparing a new Hispano Suiza car with a 1923 model, focusing on engine and brake performance. | ||
| View original record | X.4214. To R. from Hs. c. to CJ. c. to RG. c. to Da. c. to BY. Hsl/LG3.11.23. HISPANO SUIZA, X.4214. extract - X.446. Yesterday we had a trial run on a new latest type Hispano Car. This was arranged… | ||
| Scan016 | Vehicle test drive, evaluating braking, steering, and suspension performance. | ||
| View original record | contd:- -2- One test we made, we pulled up from 20 m;p.h. in 48 ft. - at 20 m.p.h. to 25 ft. When the brakes were applied hard, the back wheels skidded but we did not get the front wheels to skid. We… | ||
| Scan017 | The braking and turning circle of a Hispano car. | ||
| View original record | contd:- -3- least pressure on the foot pedal, the brakes are applied so violently that the driver is flung forward and exerts further pressure on the brakes which locks the back wheels. The turning… | ||
| Scan018 | Request for the weight of a Hispano Suiza car and data on the co-efficient of friction for different road surfaces. | ||
| View original record | X.4214 To Hs. from DA. Dal/M13.11.23. RE. HISPANO SUIZA - X.4214. Referring to your report hls1/LG9.11.23., it would be useful to us if you could send us the weight of this car back and front as with… | ||
| Scan019 | Secret memo regarding arrangements to collect a Hispano car from Barkers. | ||
| View original record | W/S. C. from Hs. S E C R E T. April Hs7/LG13.11.23. HISPANO CAR. I received a telephone message from 'D' this afternoon that the Hispano car would be ready for us to collect from Barkers tomorrow. We… | ||
| Scan020 | Testing and modifications of a 4-wheel brake system. | ||
| View original record | R.R. 409A (40 H) (SL 42 12-7-23). J.H., D. X4214 EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs3/LG14.11.23. To R. from Hs. c. to CJ. RG. c. to Da. EY. 4-WHEEL BRAKES. X.9940 X.4214 We wired you today… | ||
| Scan021 | Comparing the weights and braking characteristics of two 40/50 HP cars and a Hispano Suiza. | ||
| View original record | X4214 To DA. from Hs/Rm. Hs/Rm/LG15.11.23. X4214 X226 X200 In reply to your Dal/M13.11.23., the following are the weights of two representative 40/50 HP. cars and the Hispano Suiza - all without… | ||
| Scan022 | Request to obtain an instruction book for a Hispano car, either permanently or on loan. | ||
| View original record | W/S. To C. from Hs. X4214 Hs1/LG16.11.23. HISPANO CAR. Will you please try and obtain for us an Instruction Book for the above car. If we cannot get one for our permanent reference, we should be… | ||
| Scan023 | Clarifying a request for information on pedal pressure for braking, referencing Hispano and Isotta. | ||
| View original record | X.4214 To Hs. from Da. Dal/M17.11.23. Thank you for the information about Hispano. We note you are going to bring us any additional information when you come. I should like to mention however that I… | ||
| Scan024 | Extract from a letter by Barker & Co. Ltd regarding a delay in handing over a Hispano Suiza car. | ||
| View original record | Private. S/W Hs. Y4214 C19/C19.11.23. Re The Hispano Suiza Car. ----- The following is extract from letter from Barker & Co.Ltd:- "I should like to point out that your representative Mr. Robotham came… | ||
| Scan025 | Initial report on the Hispano car, outlining its defects and design characteristics compared to an RR car. | ||
| View original record | X.4214 To CJ. from R. c. to BJ. RG. c. to Hs. DA. RE. HISPANO CAR. X.4214. Yesterday we had the Hispano here. I will not worry you with a long report (which I have not time to write at the moment) but… | ||
| Scan026 | Development and issues of a front-wheel braking system, proposing a new torque member design. | ||
| View original record | Y4214 To C.J. from R. c. to RG. HS. c. to BJ. DA. R3/M28.11.23. RE. VISIT OF RG. AND HS. TO WL. ON 20TH. NOV. 1923. X.9940 X.2628 X.1559 X.4214. We spent the whole of yesterday on brakes. With the… | ||
| Scan027 | Experiment measuring pivot movement on a Hispano Suiza car with front brakes applied. | ||
| View original record | Hs. from Hs/RM. X4214 Hs/Rm1/LG26.11.23. HISPANO CAR. We pulled the Hispano Suiza car forward (as in the diagram) with the front wheel brakes full on. The movement of the pivot at the top and bottom,… | ||
| Scan028 | Inquiring about the petrol consumption of the Hispano car for comparison. | ||
| View original record | To Hs. from BJ. BJ15/H28.11.23. X4214 HISPANO CAR. Do we know how the petrol consumption of the Hispano compares with ours? B.J. | ||
| Scan029 | Investigation into the Hispano's bonnet louvre design and its effect on engine noise and water temperature. | ||
| View original record | To Hs. from CJ. c. to R. X4214 CJ3/E28/11/23 Mr.Royse was saying yesterday that the Hispano is so arranged that the hot air from under the bonnet is allowed to escape through louvres and cannot pass… | ||
| Scan030 | The particulars of brakes on a Hispano car. | ||
| View original record | S.S. 495 (40 H) (SL G 12-7-23). J.H.,D. EXPERIMENTAL REPORT 4214 COPIES TO: R.CJ. BJ. WOR. By. E. Da. EP. PN. OY. Expl. No. 4214 REF. Hs5/LG29.11.23. OBJECT OF TEST. Particulars of brakes on HISPANO… | ||
| Scan031 | Graph showing axle movement under load for a 'Hispano' model in two positions. | ||
| View original record | AXLE MOVEMENT HISPANO POSITION A POSITION B MOVEMENT INS .300 .200 .100 Cwts LOAD 2 4 6 8 10 12 14 A 3 B LOAD | ||
| Scan032 | Design drawing for a Hispano Brake Shoe with measurements. | ||
| View original record | HISPANO BRAKE SHOE, Create Balanced., 3/8" each end of Shoe, 15 1/2", 113°, Guide For Pipe, Steel faced for cam action, 4 1/16", 1.175", 3/4", 2 1/8", 1/4", 12 1/8", 1 1/8", 13/16", 5/8" | ||
| Scan033 | Hand-drawn diagram showing the layout and dimensions of a Hispano front brake system. | ||
| View original record | HISPANO FRONT BRAKE. 15.76 DIA. THIS IS THE DIA. IN MEAN BRAKING POSITION. I.E. WHEN SHOES ARE JUST IN CONTACT WITH DRUM. 60°. OPERATING CAM. FERODO EASED AWAY 3/4" EACH END. 112° (FERODO). SHOE.… | ||
| Scan034 | Schematic diagram of the Hispano rear brake operating mechanism, showing levers, cams, and dimensions. | ||
| View original record | HISPANO REAR BRAKE OPERATION P 10. 2.51 3.22 SERVO. 4.315. 2.67 OPERATING CAM. BRAKE DRUM. 2.73 OPERATING LEVER ON CROSS SHAFT. 3.525 LEVER AT END OF CROSS SHAFT. AWR / 24.1.23 | ||
| Scan035 | Diagram of the Hispano front wheel brake linkage system with an associated movement table. | ||
| View original record | HISPANO FRONT WHEEL BRAKE LINKAGE, P, d, d1, d2, 4.305, 3.22, 2.56, 2.75, CABLE TO FRONT BRAKE., TO OPERATE CAM., SERVO., WHEN SERVO WORKING. MOMENT ABOUT THIS PT. IS INCREASED MORE THAN GIVEN LINKAGE… | ||
| Scan036 | Referencing a Hispano car. | ||
| View original record | X4214 29/11/23 Hispano, Car | ||
| Scan037 | Hand-drawn sketch with dimensions of a Hispano Brake Shoe. | ||
| View original record | HISPANO BRAKE SHOE, Ferodo. Relieved 3/4" each end of Shoe., GUIDE FOR PIN, Steel faced for cam action, 15 1/2", = 113°, 29.5-a, 4.075, 1.175, 3/4", 2 1/2", 1/4", 1 1/16", 2 1/8", 12 1/8", 5/8", 3/4",… | ||
| Scan038 | Diagram illustrating the linkage and operation of a Hispano rear brake system. | ||
| View original record | HISPANO REAR BRAKE OPERATION, P., 10., 2.51, 3.22, SERVO., 4.315., 3.375, LEVER AT END OF CROSS SHAFT., OPERATING LEVER ON CROSS SHAFT., 2.73, OPERATING CAM., 2.67, BRAKE DRUM., AER, 21-1-29 | ||
| Scan039 | Drawing illustrating the Hispano front wheel brake linkage mechanism. | ||
| View original record | HISPANO FRONT WHEEL BRAKE LINKAGE. P d 2.5L 4.305 3.22 SERVO. CABLE TO FRONT BRAKE. TO OPERATE CAM. 2.75 WHEN SERVO WORKING MOMENT ABOUT THIS PT. IS INCREASED MORE THAN GIVEN LINKAGE SHOWN. d2 d1… | ||
| Scan040 | Technical drawing of a Hispano front brake with annotations and dimensions. | ||
| View original record | HISPANO FRONT BRAKE. 15.76 DIA. THIS IS THE DIA. IN MEAN BRAKING POSITN I.E. WHEN SHOES ARE JUST IN CONTACT WITH DRUM. 60° FERODO EASED AWAY 1/4" EACH END OPERATING CAM. SHOE. 112° (FERODO) 5.5 RAD.… | ||
| Scan041 | From R. to H.S. requesting an investigation into front road spring breakages and steering gear flexibility. | ||
| View original record | To HS. from R. 4214 R4/M30.11.23. RE. FRONT ROAD SPRINGS AND STEERING GEAR. X. 2628 X. 4214 X. 3441 FRONT SPRINGS. Can you ascertain whether a freer movement of the ends would result in less spring… | ||
| Scan042 | Requesting further particulars on Hispano-Suiza brakes, specifically the cam position and 'servo' mechanism. | ||
| View original record | X.4214 To HS. from DA. DA1/LG1.12.23. RE. HISPANO-SUIZA. X.4214. With reference to the particulars of the Hispano-Suiza brakes you have recently sent us we wonder if you could add exact particulars of… | ||
| Scan043 | Petrol consumption of a Hispano car. | ||
| View original record | CJ. from Hs. Y4214 Hs2/LG1.12.23. HISPANO CAR. With reference to your enquiry with regard to the petrol consumption of this car. On the run from Derby to WW. and back the average petrol consumption… | ||
| Scan044 | Consumption data for an R.R. vehicle under conditions similar to those of a Hispano car. | ||
| View original record | X4214 To Hs. from CJ. Hispano Car. CJ7/E3/12/23 Referring to your Hs2/LG1/12/23, have you any information as to what the consumption of the R.R. would be under similar circumstances of road and… | ||
| Scan045 | Comparing the fuel consumption of a Hispano and a standard new 40/50 chassis. | ||
| View original record | W/S. V4214 To CJ. from Hs. Hs2/T4.12.23. CJ7/E3/12/23. - RE HISPANO. ------------------------- On the recent run to W. W. we took the Hispano and a standard new 40/50 chassis, - both had all-weather… | ||
| Scan046 | Issues with the floating fulcrum brake, detailing tests to reduce jaggering. | ||
| View original record | R.R. 499A (40 H) (EL 42 12-7-23). J.H. D. 74214 EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs2/TS.12.23. 74214 To R. from Hs. c. CJ. RG. c. HY. Da. RE BRAKES. On the floating Fulcrum brake, even when we… | ||
| Scan047 | Tests conducted on the Epicyclic Equalizer, Hispano brakes, and Pedal Pressure. | ||
| View original record | R.R. 551A (48 H) (BL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Contd. Expl. No. REF: Hs2/TS.12.23. EPICYCLIC EQUALIZER. We have tried one of these made to the latest instructions. It appears to work… | ||
| Scan048 | Brief memo regarding the licence for a Hispano car. | ||
| View original record | Y4214 D/L. from Hs. Hs1/LG7.12.23. HISPANO CAR. Herewith Licence for the above car. Hs. | ||
| Scan049 | Request for the return of 'RAC' and 'AA' badges belonging to the previous owner of a Hispano-Suiza car. | ||
| View original record | S/W Hs. X4214 C5/C11.12.23. Re Hispano-Suiza. ------- Barkers inform us that the late owner of this car (Mr. Rubins) has asked them to return to them as soon as possible the 'RAC' and 'AA' badges on… | ||
| Scan050 | Request for a new oversized piston for a Hispano car, Chassis No. 10482, and confirmation of sending two badges. | ||
| View original record | W/S. C. from Hs. X4214 Hs2/LG12.12.23. HISPANO CAR. We have sent off to you today 2 Badges off the above car. We require a new piston for the Hispano. We should like to get a piston which is over-size… | ||
| Scan051 | List of tools for a Hispano Suiza vehicle, categorized by storage location. | ||
| View original record | V4214 HISPANO SUIZA TOOLS. TOOL BOX ON OFF-SIDE RUNNING BOARD. 1 1/2-gall. tin Mobiloil Oil 'B.B.'. 1 Petrol filler (Liqall) 1 Starting handle. 1 Grease gun. 3 Tyre levers. 1 Tyre pump (complete). 3… | ||
| Scan052 | Continued list of tools and spare parts. | ||
| View original record | -2- contd :- 1 Drift. 1 Box spare fuses. 2 Box spanners - Hub retaining nut. 1 Wheel spanner. 1 Hub withdrawal tool. ------------------------- DICKINSON BOND | ||
| Scan053 | Requesting the return of servo parts and a 'Braking' file, following a Sales request to test a Hispano car. | ||
| View original record | X4214 Da. from Hs. Hs2/LG20.12.23. HISPANO CAR. X4214/Y1559 Sales are asking to try the Hispano car. We should be very pleased if you will return to us the parts of the servo as soon as possible - at… | ||
| Scan054 | Follow-up memo requesting an update on obtaining a new piston for a Hispano car. | ||
| View original record | W/S. C. from Hs. X4214 Hs3/LG20.12.23. HISPANO CAR. We wrote to you (Hs2/LG12.12.23) re. new piston for Hispano car. We should be pleased if you could let us know when we are likely to obtain this as… | ||
| Scan055 | Confirming the decision to manufacture the piston for the Hispano car in-house. | ||
| View original record | W/S. X4214 C. from Hs. Hs4/LG28.12.23. HISPANO CAR. With reference to your C16/MH21.12.23 attc. We have decided to make the piston ourselves. Hs. | ||
| Scan056 | From CJ to Hs discussing plans to test brakes on a Hispano and a 40/50 HP chassis, including a proposed road test in France. | ||
| View original record | To Hs. from CJ. Brakes. Referring to your secret memo. Hs1/LG20/12/23, please let me know when you have the Hispano running again with its brakes and we will then ask PN to go to Derby to try the… | ||
| Scan057 | Post office telegram regarding the return of a Hispano servo part. | ||
| View original record | Office of Origin: Chichester T.C.O. Message: Hives Roycar Derby Hispano servo returned to you today Marmont Office Stamp: DERBY 16 JAN 24 Received here at: 10.41 M Prefix: S Handed in at: P. 1/6 M.… | ||
| Scan058 | The dispatch of delayed Hispano servo parts and the return of a file on braking. | ||
| View original record | X.4214 To Hs. from DA. DA1/M2.1.24. RE. HISPANO SERVO PARTS. X.4214. With reference to your letter and telegram re. these parts we have despatched them to you today. I regret the delay in sending… | ||
| Scan059 | Enquiry from Barkers about receiving Hispano and Isotta-Fraschini cars for sale. | ||
| View original record | S/W Hs. 4214 C6/C3.1.24. 1 X4609 X4214 Barkers write as follows:- "I shall be interested to learn when we may expect to receive the Hispazo and the Isotta-Fraschini for sale. I have at present an… | ||
| Scan060 | Letter arranging a car road test and comparison with a Hispano car's brakes. | ||
| View original record | X4214 W/S. PN. from Hs. S E C R E T. X9940 X4214 HS2/LG15.1.24. With reference to your note of the 14th.inst. According to our programme, we shall have your car ready for running on the road on… | ||
| Scan061 | Request to urgently obtain a 3-month license for a Hispano car, number XM.3790. | ||
| View original record | D/L. from Hs. YU214 Hs7/LG15.1.24. HISPANO CAR. Will you please obtain for us a 3 months licence for the above car No. XM.3790. We should be very pleased if you could get this for us immediately as we… | ||
| Scan062 | Hispano car, detailing issues with the clutch, engine, and steering. | ||
| View original record | R.R. 493 A (40 H) (SL 42 12-7-23). J.H., D. X4214 EXPERIMENTAL REPORT. Expt. No. 4214 REF: Hs1/LG16.1.24. To R. from Hs. c. to CJ. RG. c. to DA. E. HISPANO CAR. Attached herewith are particulars of… | ||
| Scan063 | Calculations and diagram for the Goshawk Clutch. | ||
| View original record | GOSHAWK CLUTCH FOR RAPIDE WITH 44 PINS TOTAL PRESS ON PLATE (12 lbs per pin) = 960 lbs AREA OF FAN DISC = 31 □" PRESS ON FAN DISC = 960/31 = 31 lbs/□" each) FOOT PRESS TO JUST RELEASE CLUTCH Press to… | ||
| Scan064 | Drawing and calculation sheet for the Hepano Clutch and Bingo operating mechanism. | ||
| View original record | HEPANO CLUTCH BINGO OPERATING MECHANISM. P 10. 1.125 FRICTION DISC PLATE WITHDRAWAL SLEEVE 437 lbs TO JUST RELEASE CLUTCH 3.812 2.25 1.225 TOTAL PRESS ON FRICTION DISC = 437 x 5.5 = 2403 lbs AREA OF… | ||
| Scan065 | Technical drawing showing multiple views and cross-sections of an axle pivot. | ||
| View original record | AXLE PIVOT, SCALE 1/2, 9.625 DIA, 7.400 CTS, S.K.F. BRG. REF No. 5504, FELT WASHER, RADIUS STAMPED, RR 8200 E232, 1.625 DIA, 4.000 DIA, 1.125, 1.875, 1.500, 0.950, 2.750, 4.250, 6.125, 6.938, 7.625,… | ||
| Scan066 | Technical drawing showing three views of a cylinder block. | ||
| View original record | CYLINDER BLOCK | ||
| Scan067 | Arrangement drawing of a clutch, featuring a top half sectional view and a front view. | ||
| View original record | DRIVING PLATE TOP HALF SECTIONAL ARRGT OF CLUTCH SCALE 1/4 | ||
| Scan068 | Diagram showing the distance between the tyre centre and pivot pin centre when in contact with the road. | ||
| View original record | FOR BEARING PAD C OF WHEEL SPINDLE C OF TYRE VERTICAL C L C OF PIVOT PIN DIAMETER OF WHEEL 895 m/m OR 35.236" SCALE 1/2 DIAGRAM SHOWING THE DISTANCE BETWEEN CENTRE OF TYRE & CENTRE OF PIVOT PIN WHEN… | ||
| Scan069 | Engineering drawing of a connecting rod showing plan, section, and end views with dimensions. | ||
| View original record | CONNECTING ROD (SCALE - 1/2) SECTION ON 'AA' 2 HOLES IN BUSH 2 BOLTS OIL GROOVE .075 .200 .350 R. 2.125 .287 1.575 R. A .375 R. .250 .250 DIA. 1.000 R. 1.075 .500 DIA. 11.800 CRS .350 DIA. 1.050 .875… | ||
| Scan070 | Detailed engineering drawing of a clutch assembly, showing multiple views and dimensions. | ||
| View original record | 10 HOLES EQUALLY SPACED, DRILL & TAP 7/16 DIA, 1.5 INCH BSF DEEP. URL. 9.975 CTS. 11.687 CTS. 12.187 DIA. SECTION A-B. 11.612 DIA. 10.192 DIA. 10.037 DIA. 12.375 DIA BOTTOM OF TEETH. FRICTION PLATE.… | ||
| Scan071 | Detailed technical drawing of a crankshaft with dimensional annotations. | ||
| View original record | CRANKSHAFT - PART SECTION SHOWING OIL HOLES IN CIRCULAR WEBS. (SCALE-1/2) ALUMINIUM PLUGS SCREWED 1.375 DIA. - VIEW IN DIRECTION OF ARROW - CLUTCH LINING 1.625 WIDE X .250 THICK. 12- .375 DIA. STUDS… | ||
| Scan072 | Confirming travel arrangements to Derby, with the intention of bringing a Hispano car. | ||
| View original record | X4214 PN7/DN/16.1.24. TO Hs. FROM P.N. In reply to your Hs2/LG15.1.24, I will come to Derby on Tuesday next, the 22nd inst., arriving at the usual time - about 1 o'clock, or I will try the Hispano up,… | ||
| Scan073 | Hispano test run, observations on the driver's controls, and alternative travel plans due to a potential railway strike. | ||
| View original record | X4214 FN8/DN/18.1.24. TO Hs. FROM P.N. I have given the Hispano a run today. My impression from casually observing the driver's seat relatively to the steering wheel controls, leads me to think that… | ||
| Scan074 | The performance and characteristics of the Hispano-Suiza four-wheel brake system. | ||
| View original record | DUPLICATE. X4214 FN1/DN/21.1.24. TO C.J. FROM P.N. HISPANO-SUIZA - FOUR WHEEL BRAKES. During the week-end I have driven this car about 100 miles under all sorts of conditions of road surface, traffic… | ||
| Scan075 | Page discussing the superiority and necessity of 4-wheel brake systems for high-class cars. | ||
| View original record | -2- all, because directly one tried to decelerate, the rear wheels started slipping without producing much effect on the speed of the car, whereas with the 4-wheel brake-system referred to above, the… | ||
| Scan076 | Internal request for steering and turning circle specifications for a Hispano-Suiza. | ||
| View original record | To Hs. from DA. X4214 DA6/M23.1.24. RE. HISPANO SUIZA. X.980 X.4214 It would be of interest and use to us at the moment if we had the locks and corresponding turning circles on the Hispano Suiza.… | ||
| Scan077 | Order for searchlight lamps for a Hispano-Suiza car. | ||
| View original record | X.4214 To Wd. from EFC. EFC3/T25.1.24. X.4214 - RE HISPANO-SUIZA CAR. Will you kindly order up, from The S.E.V. Company, for use on the Hispano-Suiza car:- 4 Searchlight lamps, 12/15 Volts - 120 B,… | ||
| Scan078 | The road testing of the brakes on a Hispano car. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H.D. EXPERIMENTAL REPORT. Expl. No. 4214 1559 REF:Hs4/LG29.1.24. To R. from Hs. c. to CJ. RG. c. to DA. E. c. to BY. WOR. ROAD TESTS ON HISPANO CAR. We have… | ||
| Scan079 | Requesting a braking system test be arranged for a Hispano car on an incline. | ||
| View original record | X4214 To Hs. from CJ. CJ5/E29/1/24 With reference to R's letter of the 27th, he seems doubtful as to whether the braking system which he proposes will hold the car from going backwards when it is on… | ||
| Scan080 | Brake testing a 40/50 HP car with cast iron servo liners, noting noise issues and comparison to the Hispano system. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H.,D. Expl. No. 9910 REF: Hs6/LG30.1.24. EXPERIMENTAL REPORT. To R. from Hs. c. to CJ. RG. c. to DA. E. c. to BY. WOR. SECRET. BRAKES. We have run a 40/50 HP. car… | ||
| Scan081 | Calculation comparing the unit pressure on servo shoes with Hispano servo shoes. | ||
| View original record | contd:- -2- Calculations show that the unit pressure on the RR. servo shoes is approximately 1/5 times the unit pressure on the Hispano servo. Hs. | ||
| Scan082 | Testing of Hispano brakes on a car running backwards on a gradient. | ||
| View original record | Y4214 CJ. from Hs. Hsl/LG30.1.24. HISPANO BRAKES. CJ5/E29.1.24. Y4214 / Y1589 / Y487 With reference to your request that we should test the Hispano brakes with the car running backwards on a gradient… | ||
| Scan083 | Letter praising the performance of a 'Type Boulogne' Hispano motor car. | ||
| View original record | TELEGRAMS, "STORAGE, SOWEST, LONDON". TELEPHONE, 3667 VICTORIA. 50, GROSVENOR GARDENS, S.W.I. Dear Hives, I have just been out in the most amazing motor car I have ever been in & with 4 other keen… | ||
| Scan084 | Letter discussing the performance of a 'Type Boulogne' car, comparing it to a Hispano, and arranging a test drive. | ||
| View original record | You really ought to have a run in it because it is wonderful. If you are coming to London in the near future, I can fix a run with the owner for you. If you are abroad & this is sent on to you try &… | ||
| Scan085 | Letter discussing the performance and qualities of 'Hispano' brakes and engines compared to other vehicles. | ||
| View original record | HS3/LG. 2nd. Feb. 1924. G.R.N. Minchin, Esq., 50, Grosvenor Gardens, London, S.W.1. Dear Minchin, I am very interested in your letter, for which many thanks. I have heard of the 'Type Boulogne… | ||
| Scan086 | Potential test drive of a Hispano Suiza special model car. | ||
| View original record | To Eg. from BJ. Copy to Hs. BJ6/H4.2.24. X 4214 HISPANO SUIZA. I attach a copy of PN14/DN1.2.24. We think probably it would be hardly worth while purchasing one of these Hispano Suiza special models,… | ||
| Scan087 | Initial impressions of the new Hispano-Suiza 'Type Boulogne' and comparing its performance to Rolls-Royce cars. | ||
| View original record | COPY. To CJ. From PN. PN14/DN1.2.24. Phil. Paddon has received the one and only new model of the Sporting Type Hispano-Suiza, which is called the "Type Boulogne". Minchin has been talking to me about… | ||
| Scan088 | Car's braking system and its suitability for the luxury market. | ||
| View original record | -2- (4) The braking system appears to be even more effective than in the case of the Hispano I tried last week. The sensitiveness of the foot-pedal is more pronounced and to such an extreme, that I… | ||
| Scan089 | Comparing Rolls Royce and Hispano cars. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H., D. V4214 EXPERIMENTAL REPORT. COPIES TO: R.C.J. BJ. WOR. By. E. Da. EP. PN. OY. Expl. No. 9940 4214 428 REF. Hs2/LG5.2.24. OBJECT OF TEST. Comparison of RR. and… | ||
| Scan090 | The hill climbing performance of a 40/50 HP car in North Devon, comparing it to a Hispano Suiza. | ||
| View original record | R.R. 493 A (40 H) (SL 42 12-7-23). J.H.D. EXPERIMENTAL REPORT. Expl. No. REF: Hn/Rm/LGS. 2. 24. HILL CLIMBING PERFORMANCE - NORTH DEVON. The following hills were climbed by a 40/50 HP. Landaulette,… | ||
| Scan091 | Braking tests conducted in North Devon on Porlock and Countisbury hills. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H.D. EXPERIMENTAL REPORT. Expl. No. REF: Hs/Rm/LGS.2.24. BRAKING TESTS - NORTH DEVON. Porlock hill - Length 2¼ miles. average grade 1 in 9¼. steepest 1 in 4¼.… | ||
| Scan092 | Comparison table of hill climbing tests in North Devon for a 40/50 HP model and a Hispano Suiza. | ||
| View original record | HILL CLIMBING TESTS - NORTH DEVON 40/50 HP. AND HISPANO SUIZA. Chassis specification. DETAIL | 40/50 HP. | HISPANO SUIZA. --- | --- | --- Turning circles. | R.H. 58½ ft. L.H. 59 ft. | R.H. 49 ft. L.H.… | ||
| Scan093 | Comparison of brake tests between the E.A.C. high-speed servo and Hispano systems in North Devon. | ||
| View original record | BRAKE TESTS - NORTH DEVON+ E.A.C. HIGH SPEED SERVE AND HISPANO SYSTEM COMPARED. Gradients up to 1 in 4 measured with gradiometer. Steeper - local intelligence obtained. | OBSERVATION. | EAC. (Cast… | ||
| Scan094 | Steering specifications and turning circles for a Hispano model. | ||
| View original record | 4214 To R. from Hs/Rm. c. to CJ. c. to RG. c. to DA. Hs/Rm1/LG7.2.24. HISPANO STEERING DETAILS. DA/5/M23.1.24. X.980 X.4214 The right and left-hand turning circles of the Hispano are 49 ft. The locks… | ||
| Scan095 | With drawings detailing a Hispano Suiza steering mechanism. | ||
| View original record | EXPERIMENTAL REPORT., B.R. 40A(40/52) (S.L.42.154-55) J.H.D., Expl. No., REF:, PIVOT CENTRE, 1 7/8", 9 7/8", 8", STEERING LEVER, 8.83, ANGULAR MOVEMENT OF PENDULUM LEVER AND STUB AXLE FOR 180°… | ||
| Scan096 | Comparing the weights and specifications of Hispano and EAC.111 front brakes. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. X4214 Expl. No. 42194 1559 x9940 REF: Hsl/LGS.2.24. EXPERIMENTAL REPORT. To R. from Hs. c. to CJ. RG. c. to DA. E. c. to BY. WOR. S E C R E T. HISPANO… | ||
| Scan097 | The condition of steel brake drum liners and a proposal to test a Hispano brake. | ||
| View original record | contd:- -2- The steel liner in the brake drums is not scored on any of the drums. We are proposing to test one of the Hispano brakes on our test rig so that we can see what happens to the drum if it… | ||
| Scan098 | Drawing of a 15 HP front brake drum made from aluminium with a steel liner. | ||
| View original record | 15 H.P. FRONT BRAKE DRUM, MATERIAL ALUMINIUM WITH STEEL LINER., .060, .210, .30, 10 mm STUDS, 4.925 DIAM, 8 HOLES, 2.50, .320, .180, 15.75 DIAM, STEEL LINER, WEIGHT = 16 lbs 9.oz | ||
| Scan099 | Cross-section engineering drawing of a carrier with dimensions and weight. | ||
| View original record | CARRIER ALUM 1.0 2.75 .3 6.7 RAD .45 TOTAL WT. OF CARRIER WITH CAM & PIVOT PINS = 8 lbs SECTN A.A. LOOKING IN DIRECTION OF ARROW. | ||
| Scan100 | Drawing of a Hispano front shoe with dimensions and a cross-section view. | ||
| View original record | HISPANO FRONT SHOE. 12.2" A SECTN. AA. 2.5" .7 .3 .30. .25 2.4 | ||
| Scan101 | Drawing of a Hispano Brake Carrier made from aluminium. | ||
| View original record | HISPANO BRAKE CARRIER TOTAL WT WITH CAM & PIVOT PINS = 8 lbs [WITHOUT] SHOES BOSS FOR GUIDE PIN FOR SHOE .500 .275 12. 10m/m HOLES .240 SECTN B B MATERIAL - ALUMINIUM RIBS PIVOT PINS | ||
| Scan102 | Design and fitting of a servo system for brakes, including servo drive and pull. | ||
| View original record | To RG. E. DA. HS.} FROM R. ~4214 SECRET. R1/M11.2.24. E. A. C. X.9940 X.4214 BRAKES. I have not written much on the various brakes under discussion because I am expecting that we shall deliver nothing… | ||
| Scan103 | Technical memorandum discussing improvements to brake design, including a comparison with Hispano brakes. | ||
| View original record | contd:- -2- one and I was in hopes we could make this a lighter pull with longer stroke, as could be arranged with the floating lever I suggested. We should note it was discussed that this scheme… | ||
| Scan104 | Page 3 of a typed letter discussing holding a car on a 1 in 5 gradient and 4-wheel brakes. | ||
| View original record | contd:- -3- reliable for the reason given below and I should like to see us be able to hold the car by the foot on a 1 in 5 gradient. P.N. I was pleased to hear that PN. had some 4-wheel brakes but I… | ||
| Scan105 | Competitor's (Hispano) remarkable acceleration and questioning whether to emulate it. | ||
| View original record | To R. from CJ. To Ver. from CJ. To Hs. from CJ. To BJ from CJ. I enclose herewith copy of further letter received from PN. How do the Hispano people arrive at this remarkable acceleration? Why should… | ||
| Scan106 | Field report letter detailing a road test, including notes on brake performance and travel itinerary. | ||
| View original record | COPY. Grand Hotel Moderne, Grenoble. Wed. 6th Feb. 1924. C.J. Reached here 6.30 this evening. Raining all day. Roads very heavy. The cast iron shoes were fitted to servo in place of the much worn… | ||
| Scan107 | Modifications to a low-speed brake servo and resulting pedal pressure. | ||
| View original record | R.R. 403A (40 H) (SL 12 12-7-23). J.H. D. 4214 EXPERIMENTAL REPORT. Expl. No. 9940 4214 REF: HS/RG11.2.24. To R. from Hs. c. to CJ. RG. c. to E. DA. c. to BY. WOR. SECRET. BRAKES. We have had the car… | ||
| Scan108 | Requesting to borrow a Hispano-Suiza 'Type Boulogne' car for performance testing at Brooklands. | ||
| View original record | X4214 To CJ. & B.J. from Hs. c. to R. WOR. PN. to Hs4/LG12. 2. 2. 24. HISPANO SUIZA. X4214 / X788 It might be useful if it could be arranged for Mr. Paddon to loan to us his Hispano car "Type… | ||
| Scan109 | Weight breakdown for Hispano Suiza components including the unit, radiator, side levers and pedals. | ||
| View original record | WEIGHT. HISPANO SUIZA. V4214 12.2.24. Weight of Unit. 344 lbs. " " Radiator. 118 lbs. " " Side levers and pedals. 21½ lbs. -------------------- | ||
| Scan110 | Chassis modifications for a trip to the South of France and competing with a Hispano car. | ||
| View original record | X.4214. CJ. c. to Wor. c. to Hs. X.9940 X.4214. Rg2/W13.2.24. I do not think there is much use in a chassis with the slow speed servo going down to the South of France until we have the final scheme… | ||
| Scan111 | Confirming a Hispano Suiza car has been sold and is unavailable. | ||
| View original record | CJ.....from C. (Copy to Hs). X4214 C11/C14.2.24. Hispano Suiza. ------- With reference to Hs4/LG12.2.24., unfortunately I could not arrange this as the car is sold and has gone up North. C. | ||
| Scan112 | Hispano engine, detailing its removal, weight, and comparison with an EAC engine. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. 4214 EXPERIMENTAL REPORT. Expl. No. 4214 REF: Hs1/LG14.2.24. To R. from Hs. c. to CH. RG. c. to FN. E. c. to DA. BY. c. to Wor. SECRET. HISPANO. We have… | ||
| Scan113 | Comparative table of road wheel Horse Power for Hispano and EAC engines at various RPMs. | ||
| View original record | contd:- -2- Comparative road wheel H.P. of Hispano and EAC. REVS. HISPANO. EAC. LOW COMP: 500 18.7 23.5 750 27.9 35.0 1000 36.7 46.2 1250 44.4 56.3 1500 52.9 66.8 1750 59.5 73.3 ----- Piston -----… | ||
| Scan114 | Secret internal memo about reducing the weight of four-wheel brakes using aluminium or duralumin. | ||
| View original record | 4214 To DA. RG. E. from R. c. to CJ. BY. BJ. WOR. HB. FN. S E C R E T. R6/115.2.24. E. A. C. FOUR WHEEL BRAKES. X.9940 X.4214 X.9930. Owing to the more general use of steel our brakes seem to have… | ||
| Scan115 | Power curve test data for a Hispano Suiza engine. | ||
| View original record | X4214 19.2.24. POWER CURVE OF HISPANO SUIZA TABLE DATA: Headers: Tacho: Revs., Engine revs., Drum R.P.M., CUT-OUT CLOSED. (Load., H.P., Load., H.P.), CUT-OUT OPEN. (Load., H.P., Load., H.P., M.P.H)… | ||
| Scan116 | Short internal memo from 'R.' to 'H.S.' concerning an arrangement related to 'HISPANO X.4214'. | ||
| View original record | X.4214 To HS. from R. R6/M19.2.24. HISPANO. X.4214. Referring to your Hs4/LG12.2.24., I have no doubt CJ. would agree. If he is away it would be quite safe for London to arrange this for you if… | ||
| Scan117 | EAC engine test, detailing horsepower results at various RPMs. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H.D. V4214 EXPERIMENTAL REPORT. Expl. No. 9771 4214 REF:Hs3/LG20.2.24. To R. from Hs. c. to RG. CJ. c. to DA. E. c. to BY. WOR. S E C R E T. EAC. ENGINE. We have… | ||
| Scan118 | Secret internal memorandum discussing three design issues: patents, steering shocks, and a heated dynamo. | ||
| View original record | 4214 To RG. E. DA. from R. c. to CJ. HS. BY. S E C R E T. E. A. C. X.9770 X.4214 X.9940. You will see by my telegram that we seem still in trouble to get EAC.3. satisfactory, in spite of my intended… | ||
| Scan119 | Comparing detonation in Hispano and EAC engines. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. To R. from Hs. c. to CJ. RG. c. to E. DA. c. to EY. WGR. Expl. No. X9770 REF: Hs1/LG26. 2.24. X4214 SECRET. E. A. C. Detonation. The… | ||
| Scan120 | Secret internal memorandum requesting further information on Hispano steering characteristics and comparing pivot inclinations. | ||
| View original record | 4214 To HS. from DA. SECRET. DA2/M27.2.24. E. A. C. RE. STEERING. X.9450 X.4214 Further information about the Hispano steering would be useful - the loads and rating of the springs for instance in the… | ||
| Scan121 | Comparing springs in the side steering tube of a Hispano car with the standard 40/50 model. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. 44214 EXPERIMENTAL REPORT. Expl. No. X3463 44214 REF Hs7/LG29.2.24. SECRET. SPRINGS IN SIDE STEERING TUBE. To R. from Hs. c. to RG. DA. c. to CJ. E. c. to… | ||
| Scan122 | Secret memorandum discussing the advantages of a modified semi-servo brake system over other patents and previous designs. | ||
| View original record | 4214 To DA. & HS FROM R. c. to CJ. BJ. Wor. RG. E. BY. Mr. Claremont. S E C R E T. E. A. C. RE BRAKE SYSTEM. R1/M.3.24. X.9940 X.4214 For various reasons and principally to avoid the Hispano and other… | ||
| Scan123 | Continued memorandum on servo and braking systems, referencing Hispano and Renault patents. | ||
| View original record | contd:- -2- accurately divided. (3) Unreliable servo, heating, wearing and oil. (4) The Hispano and no other has truly proportioned braking except by careful adjustment. We still have to avoid Renault… | ||
| Scan124 | Describing a modified semi-servo brake operating system scheme. | ||
| View original record | 44214 To HS. & DA FROM R. SECRET. R1/M3.3.24. c. to CJ. BJ. RG. WOR. E. BY. Mr. Claremont. E.A.C. BRAKE OPERATING SYSTEM. X.9940 X.4214 Referring again to my memo of yesterday, for convenience I… | ||
| Scan125 | Brake and servo wear, angle of action and back brake equaliser design. | ||
| View original record | contd:- The wear of the brakes is the same: the heat and wear of the servo is less because of the greater angle of action. This I know we were going to increase over the Hispano, but we can still… | ||
| Scan126 | Secret memo discussing brake operation, comparing the RRM system to others, and outlining the advantages of a proposed new design. | ||
| View original record | X4214 To DA. & BS. from R. c. to CJ. BJ. RG. PN. W.R. E. BY. Mr. Claremont. S E C R E T. E. A. C. RE. BRAKE OPERATION. R1/M4.3.24. X.9940 X.4214 Referring to RRM. and other systems, I find I made an… | ||
| Scan127 | Secret internal memorandum discussing improvements and alternatives for the clutch for EAC's models. | ||
| View original record | 4214 To HS. ST. RG. } E. DA. } S E C R E T. R7/M4.3.24. CLUTCH FOR EAC'S. c. to CJ.Wor.PN.BY. X.9480 X.4244 X.9580 X.4214 Some slight improvements are needed in this before we can turn it over for… | ||
| Scan128 | Different designs for a clutch brake and the necessity of a quick-stopping mechanism. | ||
| View original record | contd:- -2- I have gone over many ways of making a clutch brake but most of the simple ones leave the running shaft with end pressure by the spring. If my suggestions here given are not good or… | ||
| Scan129 | Design and setup of springs within a steering tube for better control and reduced wear. | ||
| View original record | /4214 To HS. from R. c. to CJ. RG. E. PN. BY. SECRET. E. A. C. R2/M7.3.24. SPRINGS IN STEERING TUBE. X.9450 X.12430 X.4214 Your memo. passed mine in the post. I am not entirely in favour of balanced… | ||
| Scan130 | Brakes Scheme DES.60, focusing on equal forward and backward servo operation. | ||
| View original record | R.R. 493 A (40 H) (SL 42 12-7-23). J.H.,D. 4214 EXPERIMENTAL REPORT. Expl. No. 1559 9940 4214 REF: Hs1/LG10.3.24. To R. from Hs. c. to CJ. RG. c. to DA. E. c. to BY. WOR. S E C R E T. BRAKES - SCHEME… | ||
| Scan131 | Continued memo discussing the mechanical details of a car being tested. | ||
| View original record | contd:- -2- definite advantage because it would allow a car to be made in which the driving operations were all light ones. We are not satisfied that the mechanical details on the one we are testing… | ||
| Scan132 | Obtaining data from a Hispano engine. | ||
| View original record | X4214 EXPERIMENTAL REPORT. COPIES TO: RCJ BJ. WOR. By. E. Da EP. PN OY RG Expl. No. 4214 4580 REF. Hs2/LG11.3.24. OBJECT OF TEST. To obtain data of Hispano engine. TESTER. A. C. Lovesey. W. A.… | ||
| Scan133 | Comparing the specifications and power output of Hispano and E.A.C. engines. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 4214 9770 REF: Hs/ACL/LG 11.3.24. COMPARISON OF HISPANO AND E.A.C. ENGINES. HISPANO. E.A.C. Bore and stroke. 3.938 X 5.512… | ||
| Scan134 | Fuel distribution and the effects of dual ignition on a Hispano engine. | ||
| View original record | R.R. 495A (40 H) (SL 42 12-7-23). J.H., D. -2- 11.3.24. EXPERIMENTAL REPORT. Expl. No. 4214 9770 REF Hs/ACL/LG. DISTRIBUTION. Good - with slight tendency for central cylinders to richen as speed… | ||
| Scan135 | Continuation page of a report on indicator valve performance and volumetric efficiency. | ||
| View original record | contd:- -2- In this position one would say that the indicator valve is likely to get the full benefit of any detonation set up. We are still not entirely satisfied with the vol. efficiency at low… | ||
| Scan136 | Indicator work and performance tests conducted on a Hispano engine. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 4214/4580 REF: H.S./R.A./1.G12.3.24. HISPANO INDICATOR WORK. We have carried out tests on the Hispano engine with the original… | ||
| Scan137 | Hispano indicator diagrams taken at 1500 and 2500 RPM. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H. D. EXPERIMENTAL REPORT. Expl. No. 4214 4580 REF: Hs/Rm/L.12.3.24 HISPANO INDICATOR DIAGRAMS TAKEN AT 1500 AND 2500 R.P.M. On these diagrams we have plotted the… | ||
| Scan138 | Performance chart showing piston displacement for crank angles of a Hispano engine. | ||
| View original record | EXHAUST LEAKS RECORDED IF ONE PLUG ONLY IS USED 02 Spring Used—Rating 91.5 Diagram Area 12.05□" Engine HISPANO Cyl. No. 6 Air Temp. 12°C Bar Temp. 765mm Cooling Water Temp. 80°C R.P.M. 1500 Lbs. Lift… | ||
| Scan139 | Small pencil sketch of a component section. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM. 12 MAR. 24 DERBY | ||
| Scan140 | Indicator diagram showing piston displacement for crank angles of a Hispano engine cylinder. | ||
| View original record | 6.2 Spring Used-Rating 91.5 Diagram Area 103 □" Engine HISPANO Cyl. No. 6 Air Temp. 12°C Bar Temp. 765 m/m Cooling Water Temp. 80°C R.P.M. 2500 Lbs. Lift 108 H.P. 112.8 I.M.E.P. 118 LBS/□" B.M.E.P.… | ||
| Scan141 | Graph comparing the specific output of E.A.C. and Hispano engines. | ||
| View original record | SPECIFIC OUTPUT OF E.A.C. & HISPANO. HP/LITRE B.H.P./LITRE. Y-AXIS: 0, 5, 10, 15, 20 R.P.M. X-AXIS: 0, 500, 1000, 1500, 2000, 2500 DATA LINES: HISPANO E.A.C. 2 CARBS. R.R.C.H. STD. E.A.C. WITH KNAVE… | ||
| Scan142 | Graph comparing B.M.E.P. against conventional gas velocity past valves for E.A.C. and Hispano engines. | ||
| View original record | B.M.E.P. AGAINST CONVENTIONAL GAS VELOCITY PAST VALVES B.M.E.P. STARTS TO FALL AT APPROX 160 FT/SEC GAS VEL. FOR E.A.C. & 183 " " " " HISPANO. B.M.E.P. lbs/□" GAS VELOCITY PAST VALVES FT/SEC. HISPANO… | ||
| Scan143 | Performance curves for a Hispano engine, detailing cooling water flow and induction pipe depression. | ||
| View original record | CURVES FOR. HISPANO ENGINE. BORE X STROKE = 100x140 m/m. CAPACITY 6.59 LITRES. COMPN RATIO 4.67. COOLING WATER FLOW GALL/MIN. 5 10 15 20 WATER FLOW. INDUCTION PIPE DEPN. INDUCTION PIPE DEPN. INS. OF… | ||
| Scan144 | Graph comparing E.A.C. and Hispano inlet valve lift diagrams against crankshaft degrees. | ||
| View original record | E.A.C. & HISPANO VALVE LIFT DIAGMS. COMPARED. INLET VALVES. .50 .40 .30 .20 .10 E.A.C. HISPANO E.A.C. REDUCED TO SAME LIFT AS HISPANO HISPANO E.A.C. BOTTOM CENTRE CRANKSHAFT DEGREES. | ||
| Scan145 | Graph plotting inlet valve displacement against piston displacement, comparing 'Hispano' and 'E.A.C.' specifications. | ||
| View original record | INLET VALVE DISPLACEMENT. ON PISTON DISPLACEMENT BASE. TOP CENTRE .50 .40 .30 .20 .10 0 HISPANO E.A.C. PISTON DISPLACEMENT FROM IN CENTRE. STROKE 0 1 2 3 4 5 5.5 10 20 30 40 50 60 70 80 90 100 110 120… | ||
| Scan146 | Graph comparing ignition advance required for maximum power on E.A.C. and Hispano engines, showing the effect of synchronised dual ignition. | ||
| View original record | IGNITION ADV. REQUIRED TO OBTAIN MAX. POWER ON E.A.C. & HISPANO, SHOWING EFFECT OF THE SYNCHRONISED DUAL IGNITION ON HISPANO. E.A.C. GIVES AUDIBLE DETONATION TO APPROX. 1300 RPM. HISPANO GIVES AUDIBLE… | ||
| Scan147 | Performance curves for a Hispano engine showing horse power, efficiency, and pressures against RPM. | ||
| View original record | HISPANO ENGINE HORSE POWER MECH. EFF. % ENGINE R.P.M. MECH. EFF. I.H.P. B.H.P. H.P. TO ROTATE ENGINE I.M.E.P. AND B.M.E.P. LBS / SQ' EXPLOSION PRESSURE LBS / SQ' VOL EFF. % COMPR. PRESSURE LBS/SQ'… | ||
| Scan148 | Diagrams showing the valve timing and displacement curves for a Hispano engine. | ||
| View original record | HISPANO VALVE DIAGMS. IN.O Ex.C. 5° EFFECTIVE. TIMING DIAGM. IN.C. 45° Ex.O. 45° HISPANO INLET VALVE DISPLACEMENT CURVE WITH 2 m.m. CLEE MAX LIFT = .391 EXHAUST VALVE DISPLACEMENT CURVE WITH 2 m.m.… | ||
| Scan149 | Load versus deflection graph for Hispano-Suiza front road springs. | ||
| View original record | G4214 HISPANO-SUIZA FRONT ROAD SPRINGS. NEAR SIDE SPRING. Initial Camber = 2.563" Length. Unloaded = 39" Loaded = 39.6" 12 LEAVES. WIDTH = 2.328" 17" 22" HISPANO SPRING RATING: 430 Lbs/in deflection.… | ||
| Scan150 | Blank page with a red 'Print Room' stamp from Derby. | ||
| View original record | ROLLS-ROYCE LIMITED PRINT ROOM 25 AUG. 1928 DERBY. | ||
| Scan151 | Test data for a Hispano servo, focusing on the ratio of torque output to input. | ||
| View original record | H.R. 493 (40 H) (SL 42 12-7-23). J.H.D. 4214 EXPERIMENTAL REPORT. COPIES TO: R.CJ. BJ. WOR. By. E. Da. EP. PN. OY. Expl. No. 4214 1559 REF. Hs/ACL1/LG11.3.24. OBJECT OF TEST. Data of Hispano servo.… | ||
| Scan152 | Servo efficiency and performance characteristics. | ||
| View original record | B.R. 493A (40 H) (BL 42 12-7-23). J.H. D. -2- EXPERIMENTAL REPORT. Expl. No. 4214 REF: Hs/ACL/LG11. 3. 24. The values of µ were calculated taking into account the wrapping action of the two servo… | ||
| Scan153 | The particulars and performance of Hispano front springs. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H.D. 4214 EXPERIMENTAL REPORT. Expl. No. 4214 REF.Hs3/LG11.3.24. To R. from Hs. c. to CJ. RG. c. to E. DA. c. to BY. WOR. PARTICULARS OF HISPANO FRONT SPRINGS.… | ||
| Scan154 | Secret memorandum discussing the design and comparison of different brake systems, including servo-assisted and Hispano types. | ||
| View original record | fur214 To HS. DA. FROM R. S E C R E T. R3/M14.3.24. c. to CJ. BJ. RG. E+ BY. PN. E.A.C. X.9940 RRM. BRAKE SYSTEM. X.4214 You will notice that I suggested the servo should do six eighths of the brake… | ||
| Scan155 | Continued memorandum discussing stress ratios, mentioning a Mr. Stent and an item designated EAC.1. | ||
| View original record | contd:- -2- with quarter the stress. Mr. Stent will appreciate the value of this which would have saved us much anxious thought. EAC.1. had about this ratio. R. | ||
| Scan156 | List of weights in pounds and ounces for various units of a Hispano Suiza engine. | ||
| View original record | To R. from Hs. c. to CJ. RG. c. to E. DA. c. to EY. Wor. 4214 Hs1/LG8.4.24. HISPANO SUIZA WEIGHTS. X.4214. We give below list of weights of various units on Hispano engine. SECTION. | DETAIL WEIGHTS.… | ||
| Scan157 | List of engine component weights in pounds and ounces. | ||
| View original record | CONTD:- -2- SECTION. DETAIL WEIGHTS. lbs. ozs. WATER PUMP. Water Pump complete. 3 0 PISTONS. 6 Pistons complete with rings, gudgeon pins and lock plates. 11 4 6 gudgeon pins. 2 10 Total weight -- 13… | ||
| Scan158 | The performance and modifications of a 4-wheel brake system. | ||
| View original record | R.R. 403A (20M) (D.A. 652 20-3-24) J.H.D. 4214 9940 Expl. No. 4214 REF: HS1/LC28.4.24 EXPERIMENTAL REPORT. S E C R E T. EXPERIMENTS ON 4-WHEELBRAKES. To R. from Hs. c. to CJ. RG. c. to DA. E. c. to… | ||
| Scan159 | The performance of two braking schemes, the 'RRM' and the 'Agreed', focusing on servo assistance and lag. | ||
| View original record | R.R. 493a (20H) (D.A. 652 20-3-24) x.h.n. -2- Expl. No. 9940 4214 REF: Hs1/LG28.4.24. EXPERIMENTAL REPORT. The RRM. scheme is working remarkably well. It is practically impossible under any condition… | ||
| Scan160 | The operation of the brake pedal and servo assistance mechanism. | ||
| View original record | R.R. 453A (20H) (D.A. 652 20-3-24) J.H.D. -3- EXPERIMENTAL REPORT. Expl. No. 9940 4214 REF: Hs1/LG28.4.24. brake pedal - the first effect is caused by the resistance of the brake pull off springs and… | ||
| Scan161 | Comparing the 'agreed' brake scheme with a 'Hispano' system. | ||
| View original record | B.R. 488A (20H) (D.A. 652 20-3-24) J.B.D. -4- EXPERIMENTAL REPORT. Expl. No. 9940 4214 REF: Hs1/LG28.4.24. resistance is suddenly overcome. The 'agreed' scheme has been improved by reducing the power… | ||
| Scan162 | The M. DES. 60 braking scheme, its servo-related faults, and a comparison with other four-wheel brake systems. | ||
| View original record | R.R. 403A (20H) (D.A. 652 20-3-24) J.B.D. -5- 9940 EXPERIMENTAL REPORT. Expl. No. 4214 REF: Hs1/LG28.4.24. M. DES. 60 SCHEME. This scheme has a similar fault to the 'agreed' scheme caused by the… | ||
| Scan163 | Brake design improvements, patenting a new ratchet drive, and engine issues, with a comparison to a Renault model. | ||
| View original record | X4214 [Handwritten and struck through] To E. and DA. from R. c. to CJ. Wor. RG. BY. Hs. S E C R E T. E. A. C. R1/M28.8.24. X.9770 X.4214 X.9550 X.1013. I think you did well in finding the… | ||
| Scan164 | Inefficiency and weaknesses of a re-built Hispano servo motor during testing. | ||
| View original record | Y4214 To R. from Hs. c. to CJ. RG. c. to DA. E. c. to BY. WOR. SECRET. Hs1/LG29.4.24. HISPANO SERVO MOTOR. X.1559. X.4214 As pointed out in a previous report, when the Hispano unit was re-built we… | ||
| Scan165 | Hispano servo motor, detailing performance data after restoration. | ||
| View original record | R.R. 493A (20H) (D.A. 652 20-3-24) J.H.D. 1559 Expl. No. 4214 REF: Hs/ACL/LG29.4.24. EXPERIMENTAL REPORT. HISPANO SERVO MOTOR. It was found after previous tests on this servo that the braking on the… | ||
| Scan166 | Producing 'brake jaggers' on Hispano, Isotta, and Delage cars. | ||
| View original record | R.R. 403A (20H) (D.A. 652 20-3-24) J.H.D. EXPERIMENTAL REPORT. To R. from Hs. c. to CJ. RG. c. to DA. E. c. to BY. WOR. Hispano Car. Expl. No. 9940 4214 1559 REF: Hs1/LG1.5.24. S E C R E T. BRAKE… | ||
| Scan167 | Brake performance, testing different brake shoes and linings to investigate the cause of 'jagger' vibrations. | ||
| View original record | R.R. 405A (SGH) (D.A. 652 20-5-24) R.H.D. -2- Expt. No. 4214 9940 REF: Hel/LG/5.24. EXPERIMENTAL REPORT. When we found we could not get any braking with direct pressure on the front brakes we carried… | ||
| Scan168 | Tests to prevent brake jaggers by modifying the brake shoe lining. | ||
| View original record | R.R. 493A (20H) (D.A. 652 20-3-24) J.H.D. -4- EXPERIMENTAL REPORT. Expl. No. 9940 4214 REF: Hsl/LG1.5.24. disappeared and also we could get no braking. We had anticipated from the theories put forward… | ||
| Scan169 | List of unsuccessful experiments to eliminate front wheel brake jaggers on vehicle EAC.111. | ||
| View original record | DETAILS OF TESTS CARRIED OUT TO DATE ON FRONT WHEEL BRAKE JAGGERS ON EAC.111. The following experiments have proved unsuccessful in eliminating or in any way altering the jaggers :- 'A' - EXPERIMENTS… | ||
| Scan170 | List of experiments conducted on brakes and brake carriers. | ||
| View original record | 'B' - EXPERIMENTS ON BRAKES AND BRAKE CARRIER. (15) Varying amount of slack in shoe anchorage. (16) Flexible brake shoes fitted ( bronze ) (17) Floating fulcrum brakes fitted. (18) All types of split… | ||
| Scan171 | Methods to eliminate brake 'jaggers' and listing factors that do not cause the issue. | ||
| View original record | WE CAN ELIMINATE JAGGERS BY :- (1) Fitting some form of torque arm or parallel radius rods to the front axle. (2) Introducing an oil dashpot in parallel with the front brake operation; this makes it… | ||
| Scan172 | The 'RRM' scheme of brakes, discussing brake jaggering, servo operation and lag. | ||
| View original record | H.H. 4A0A (SOH) (D.A. 652 28-2-24) J.H.D. 4214 EXPERIMENTAL REPORT. Expl. No. 9940 / 4214 REF: Hs3/LGl.5.24. To R. from Hs. c. to CJ. RG. c. to DA. E. c. to BY. WOR. S E C R E T. RRM. SCHEME OF… | ||
| Scan173 | Comparing the driver feel and performance of the RRM braking scheme against the Hispano scheme. | ||
| View original record | R.R. 403A (20H) (D.A. 652 20-3-24) J.B.D. -2- EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs3/LG1.5.24. We have been able to find the lag on the RRM. scheme, but it is very difficult to distinguish it.… | ||
| Scan174 | Secret memo regarding the arrival of cars for testing different 4-wheel brake schemes. | ||
| View original record | 4214 S E C R E T. Hs4/LG1.5.24. To R. from Hs. c. to CJ. RG. c. to DA. E. c. to BY. Wor. 4-WHEEL BRAKES. 4214 x9940 We propose arriving at WW. on Tuesday morning with the - Hispano, 40/50 HP. fitted… | ||
| Scan175 | Comparison table of different front wheel brake schemes and their performance characteristics. | ||
| View original record | TITLE: FRONT WHEEL BRAKE SCHEMES COMPARED. COLUMN HEADERS: Scheme. Servo speed. Servo ratio Torque out / Torque in Direct braking without servo assistance. Total braking. Torque to servo from pedal.… | ||
| Scan176 | Secret memo discussing experiments to avoid brake 'jaggers' by testing stiff brake drums, referencing Hispano and Isotta cars. | ||
| View original record | 14214 To RG. & HS. FROM H. S E C R E T. R3/M3.5.24. E. A. C. SERVO - RE. JAGGERS. X.9940 Y4214 X.1559 Y9910 In spite of your numerous and valuable experiments we are not much nearer to the complete… | ||
| Scan177 | Secret memo discussing tests on a car's brake servo with a modified reduction ratio, comparing its performance to a Hispano. | ||
| View original record | To R. from Hs. c. to CJ. RG. c. to DA. E. c. to BY. Wor. 4214 S E C R E T. BRAKES. X.9940 X.4214 We have tested the car fitted with the 'Agreed' scheme with the servo running at 10 to 1 instead of 30… | ||
| Scan178 | Instruction sheet for Hispano-Suiza front shock absorbers with pressure specifications. | ||
| View original record | RR6 (1500H) (DH540 1-12-23)MP 283179 t4217 ROLLS-ROYCE LTD. INSTRUCTIONS. 15-5-24 192 To Order No. Customer's No. Hispano-Suiza. FRONT SHOCK ABSORBERS. Off Side: P = 18 LBS. Near Side: P = 27 LBS.… | ||
| Scan179 | The policy and characteristics of four-wheel brake systems. | ||
| View original record | R.R. 403A (20H) (D.A. 652 20-5-24) J.B.D. Y4214 EXPERIMENTAL REPORT. Expl. No. 9940 4214 REF: Hsl/LG21.5.24. S E C R E T. To R. from hs. c. to CJ. RG. c. to DA. E. c. to BY. Wor. c. to PN. FOUR-WHEEL… | ||
| Scan180 | The dangers of wheel lock during braking and its effect on steering. | ||
| View original record | R.R. 402a (20H) (D.A. 669 20-9-24) J.R.D. -2- EXPERIMENTAL REPORT. Expl. No. 9940 REF.Hsl/LG21.5.24. which, when the wheels lock continues in a straight course, is more dangerous than one which skids… | ||
| Scan181 | Continued memorandum discussing the variation in braking performance between different cars. | ||
| View original record | contd:- -2- Hs1/LG21.5.24. cars we get considerable variation between different cars as regards braking. We are using the same brakes in connection with the adopted scheme. Hs. | ||
| Scan182 | Request to order new Ferodo brake linings for a Hispano car, including specifications. | ||
| View original record | 14214 BY. from Hs. Hs9/LG27.5.24. HISPANO CAR. We require some new Ferodo Liners for the servo of the Hispano car. We are nearly certain that the Ferodo people supply these linings. The internal dia.… | ||
| Scan183 | Confidential internal memorandum discussing the patent implications of using a plate clutch for a servo mechanism, compared to Hispano and Renault designs. | ||
| View original record | 4214 To BY. and Mr. Claremont. From R. c. to CJ. BJ. RG. DA. E. Hs. SECRET. RL/M23.6.24. E. A. C. PLATE CLUTCH FOR SERVO. X.1013. RE. RENAULT. X.9910 X.4214 I cannot see that the substituting of the… | ||
| Scan184 | Querying the performance of the Hispano front axle, including bearing wear, water protection, and a description of its assembly. | ||
| View original record | X.4214 To HS. from DA. Dal/M25.6.24. HISPANO FRONT AXLE. X.4214. Mr. Royce would be interested to learn how the front axle of the Hispano stands up. Is the ball bearing punished at all, and are there… | ||
| Scan185 | The dispatch of a 'Hispano Pivot' for inspection. | ||
| View original record | To BP. from Hs. c. to Mr. Chatwin - Stores. 4214 Hs2/LG28.6.24. We are sending into the Stores for despatch to Mr. Day, Camacha, WW. 1 Hispano Pivot. We are sending this pivot for his inspection. Will… | ||
| Scan186 | Condition and removal method for pivots on a Hispano car. | ||
| View original record | To DA, from Hs. April HISPANO CAR. We are sending to you one of the Hispano Pivots so that you can see the condition. Whilst the car has been in our hands we have had no trouble with the pivots and… | ||
| Scan187 | Issue of boiling water in the 40/50 HP engine and potential solutions. | ||
| View original record | To BY. HS. RG. ) CJ. BJ. PN. ) FROM R. E. DA. EF. ) V4214 R2/M21.8.24. RE. BOILING WATER. in 40/50 HP. X.755 X.3456 X.4214. (1) We ought to make the car right without boiling when running on top gear… | ||
| Scan188 | List of observations and questions regarding engine cooling, fan performance, and radiator design, with comparisons to a Hispano model. | ||
| View original record | contd :- -2- a small amount of water as steam. Water thrown out by expansion and steam bubbles is I believe making all the fuss and distress. (7) Our fan has always been very large and efficient… | ||
| Scan189 | Engine cooling improvements, comparing radiator design and water circulation with a Hispano engine. | ||
| View original record | contd :- -3- dynamometer. Its radiator has larger face area than ours, and possibly more efficient exit of heated air through louvres. Letting the heated air escape, firstly by louvred bonnet: and… | ||
| Scan190 | Design and efficiency of car radiators for the 20 HP and 40/50 models. | ||
| View original record | 44214 SECRET To RG. } HS. } FROM R. c. to CJ. BJ. DA. E. BY. EP. RE. VISIT OF RG & HS. TO WW. ON 27th. & 28th. INST. X.766 X.3456 X.3438 X.9250 X.4214 X.4240 RE. CAR RADIATORS: From figures the 20 HP.… | ||
| Scan191 | Engine cooling issues, fan efficiency, bonnet design, and solutions to prevent boiling and water loss. | ||
| View original record | Contd :- -2- that not one car in 500 is satisfactory under full throttle, low speed, and hot weather, and the larger the engine the greater the deficit. Careful comparison will be made: reports are… | ||
| Scan192 | The heat given to the cooling water of a Hispano engine during a dynamometer test. | ||
| View original record | R.R. 493 (40 H) (8L 42 12-7-23). J.H., D. +4214 EXPERIMENTAL REPORT. COPIES TO: R.C.J. BJ. WOR. By. E. Da. RG Expl. No. +4214 X3454 REF. Hs/ACL1/LG22.9.24. OBJECT OF TEST. Heat given to cooling water… | ||
| Scan193 | Analyzing the thermal efficiency and heat losses of a Hispano engine. | ||
| View original record | R.R. 405A (20H) (D.A. 652 20-3-24) J.H.H. EXPERIMENTAL REPORT. Expl. No. REF Hs/ACL/LG22.9.24. THERMAL EFFICIENCY AND HEAT LOSSES OF HISPANO ENGINE. The following is an analysis of the heat losses for… | ||
| Scan194 | Energy diagram for a Hispano engine, detailing the distribution of heat energy against engine RPM. | ||
| View original record | ENERGY DIAGRAM FOR HISPANO CAL VALUE OF FUEL TAKEN AS 19,000 B.Th.Us/lb AS FOR PREVIOUS DIAGRAMS. S.G. PETROL .765 % OF INITIAL HEAT ENERGY R.P.M. LOSSES TO:- JACKET WATER EXHAUST, PUMPING RADIATION… | ||
| Scan195 | Radiator tests conducted on a Hispano car. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H. D. x4214 EXPERIMENTAL REPORT. COPIES TO: RCJ BJ WOR By E. Da EP PN RG Expl. No. 4214 REF. Hs2/LG22. 9.24. OBJECT OF TEST. Radiator tests on Hispano Car. TESTER.… | ||
| Scan196 | The results of radiator tests conducted on a Hispano car. | ||
| View original record | R.R. 40SA (20H) (D.A. 652 20-3-24) J.B.D. -1- EXPERIMENTAL REPORT. Expl. No. REF: Hs/ACL/LG22.9.24. RADIATOR TESTS ON HISPANO CAR. The following results were obtained from dynamometer tests of the… | ||
| Scan197 | Table of radiator test results conducted on a Hispano car, with and without the bonnet fitted. | ||
| View original record | RADIATOR TESTS ON HISPANO CAR. | Condition of test. | Eng. r.p.m. | Air passing through radiator. ||| Air passing through core. || Temp. of room. | B.T.U's min. accounted for by Radiator. |… | ||
| Scan198 | Graph comparing heat flow to jacket water and heat dissipated by radiators for 40/50 HP and Hispano engines. | ||
| View original record | HT FLOW TO JACKET WATER & HT DISSIPATED BY RADIATORS IN STILL AIR 40/50 HP & HISPANO Y-Axis: B. TH. US / MIN X-Axis: ENG R.P.M Data series: HT TO JACKETS 40/50 HP HT TO JACKETS EAC HT TO JACKETS… | ||
| Scan199 | Graph comparing Heat Transfer Flow at full load for the 40/50 HP and Hispano models. | ||
| View original record | HT. FLOW FULL LOAD FOR 40/50 HP & HISPANO B.TH.US/MIN. H.P. AT ROAD WHEELS 40/50 H.P. FULL LOAD HISPANO FULL LOAD 22/9/24 A.C.L. [STAMP] REC'D ... [STAMP] 23 SEP. 24 [STAMP] DERBY | ||
| Scan200 | Leverage fluctuation of square cams in four-wheel brake systems. | ||
| View original record | To Hs. from Da. 4214 Da2/M10.10.24. FOUR WHEEL BRAKES. A.9940 X.1559 X.4214. Replying to your Hs3/LG7.10.24., the statement referred to is sufficiently true when compared with square cams and similar… | ||
| Scan201 | Heat flow to jacket water on a Hispano car. | ||
| View original record | R.R. 490A (20H) (D.A. 652 20-3-24) J.B.H. 44214 EXPERIMENTAL REPORT. Expl. No. REF: HS/ACL/L.G13.10.24. not sent out HEAT FLOW TO JACKET WATER ON HISPANO CAR. The following tests to determine the heat… | ||
| Scan202 | The effect of fuel mixture strength on engine heat flow and power output. | ||
| View original record | R.R. 495A (SOII) (D.A. 652 30-3-24) J.B.D. -2- Expl. No. REF: HS/ACL/LG13.10.24. 'EXPERIMENTAL REPORT. 1000 r.p.m. by increasing the mixture strength by 38% from that which just gives maximum torque,… | ||
| Scan203 | Data tables showing heat flow to jacket water for a Hispano engine under different conditions. | ||
| View original record | -3- HISPANO HEAT FLOW TO JACKET WATER. Max. figures for Ht. flow. Ht. flow in B.T.H.U's/min. | Eng. revs. | HP. at road wheels. | Cons: Pts. hr. | Heat supplied by fuel. | Heat flow to water/min. |… | ||
| Scan204 | Graph of performance curves for a Hispano car, showing heat flow, horsepower, and fuel consumption against engine RPM. | ||
| View original record | CURVE No. I. HEAT FLOW TO JACKET WATER. HISPANO CAR. THE FIGURES FOR HT FLOW ARE THE MAXIMUM WE HAVE RECORDED FOR THIS ENGINE AND ARE TAKEN FOR THE WEAKEST MIXTURE THAT WILL JUST MAINTAIN MAX. TORQUE.… | ||
| Scan205 | Graph showing the reduction in heat flow with a richer mixture for a Hispano engine. | ||
| View original record | CURVE. 2. HISPANO. CURVE SHOWING REDUCTION IN HT. FLOW WITH RICHER MIXTURE. ONLY TWO POINTS ARE GIVEN FOR THE LOWER CURVE. B.T.U.S. PER MIN. ENG. R.P.M. HT. FLOW FOR WEAKEST MAINTAINED. AS ON CURVE 1.… | ||
| Scan206 | Internal order memo for two Ferodo friction discs for a Hispano Car. | ||
| View original record | Ms. from Hs. 44214 Hs/Rml/LG17.10.24. Will you please order for us :- 2 Ferodo friction discs suitable for the Hispano Car :- External dia. 13.5". Internal " 11.875". Thickness .250". Hs/Rm. | ||
| Scan207 | Specifying the correct dimensions for Hispano car clutch lining friction discs, referencing a letter from Messrs. Ferodo. | ||
| View original record | To Wd/D n. from Hs/Rm. X4214 Hs/Rnl/LG27.10.24. HISPANO CAR. With reference to the attached letter from Messrs. Ferodo dated 25th.inst. The friction discs are required for a clutch lining. The… | ||
| Scan208 | Cooling investigations and radiator tests. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H. D. EXPERIMENTAL REPORT. X4214 COPIES TO: R.C.J. BJ. WOR. By. E. Da. EP. PN. OY. Expl. No. X.766 X.3456 X.4250 X.4214 REF. Hs7/LG28.11.24. OBJECT OF TEST. COOLING… | ||
| Scan209 | Summary on engine overheating issues at low speeds. | ||
| View original record | R.R. 403A (20H) (D.A. 552 20-5-24) J.B.D. -2- EXPERIMENTAL REPORT. Expl. No. REF Hs7/LG28.11.24. Summary of test - contd :- over-heating at low speeds can be improved by ensuring that the fan is… | ||
| Scan210 | Methods for comparing radiator cooling efficiencies. | ||
| View original record | R.R. 493A (20H) (D.A. 652 20-3-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF:Hs/Rm/LG25.11.24. RADIATOR COMPARISONS. The fundamental difficulties which have hitherto mitigated against satisfactory… | ||
| Scan211 | Radiator cooling efficiency, referencing Newton's Law of Cooling. | ||
| View original record | R.R. 403A (20H) (D.A. 653 20-3-24) J.E.D. -2- EXPERIMENTAL REPORT. Expl. No. REF Hs/Em/LG25.11.24. circulation in this way being maintained normally by the pump. Top and bottom water temperatures and… | ||
| Scan212 | Method for testing radiator cooling performance. | ||
| View original record | R.R. 403A (20H) (D.A. 652 20-5-24) J.H.D. -3- EXPERIMENTAL REPORT. Expl. No. REF:Hs/Rm/LG25.11.24. To obtain δt for any radiator the car was driven at full throttle towing a second car in a low gear,… | ||
| Scan213 | Page summarizing radiator test results, detailing improvements from matrix heights and ventilation. | ||
| View original record | R.R. 493A (20H) (D.A. 652 20-3-24) J.H.D. -4- EXPERIMENTAL REPORT. Expl. No. REFHS/Rm/LG25.11.24. The critical atmospheric temperature therefore is 95°C - St. SUMMARY OF RADIATOR RESULTS. Improvements… | ||
| Scan214 | Vehicle cooling system efficiency, comparing fan and radiator performance. | ||
| View original record | R.R. 493A (20H) (D.A. 652 20-5-24) J.R.D. -5- Expl. No. REF: Hs/Bm/LG25.11.24. EXPERIMENTAL REPORT. 40/50 is enormously dependent upon its Fan. When the RR. fan is removed, the efficiency of the… | ||
| Scan215 | Comparing the cooling performance of the Hispano and 40/50 HP engines at 20 M.P.H. | ||
| View original record | R.R. 493A (20H) (D.A. 652 20-8-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF HS/Rm/LG25.11.24. HISPANO AND 40/50 HP. R-R COOLING 20 M.P.H. The 40/50 HP. is not so well cooled as the Hispano at 30… | ||
| Scan216 | Comparing the merits of Hispano and 40/50 type radiator matrices. | ||
| View original record | R.R. 403A (20H) (D.A. 652 20-2-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF:Hs/Rm/LG25.11.24. COMPARATIVE MERITS OF HISPANO AND 40/50 TYPE MATRICES. We have proved that the40/50 fan does more than… | ||
| Scan217 | With recommendations to reduce vehicle over-heating. | ||
| View original record | R.R. 403A (20H) (D.A. 652 20-3-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF. Hs/Rm/LG25.11.24. RECOMMENDATIONS TO REDUCE OVER-HEATING. Increase matrix height. The increase of matrix height to 22¾"… | ||
| Scan218 | Table evaluating the performance of different radiator matrix heights and depths at a road speed of 30 m.p.h. | ||
| View original record | SHEET 1. VALUE OF INCREASING MATRIX HEIGHT ALSO REDUCING DEPTH. No ventilation. Matrix details. SC % difference from 'A'. Critical atmospheric temperature. STANDARD. Matrix height 20 1/4" Depth 4.8".… | ||
| Scan219 | Performance table comparing various bonnet ventilation configurations at different speeds. | ||
| View original record | SHEET 2. VALUE OF VARIOUS TYPES OF VENTILATION 20A MATRIX. | | δt | % difference from 'A' | Critical atmospheric temperature. | |---|---|---|---| | 30 M.P.H. BONNET DETAILS. | | | | | Standard -… | ||
| Scan220 | Comparative analysis of cooling system performance for Hispano and 40/50 models under various conditions. | ||
| View original record | SHEET 3. RELATIVE VALUE OF HISPANO AND 40/50 FANS. 30 M.P.H. CAR DETAILS. | Sc | % difference from 'A'. | Critical ats. temperature. ---|---|---|--- 40/50 HP. 20 1/4" matrix. Louvres. | 70.5°C | 'A' |… | ||
| Scan221 | Test data tables on the cooling efficiency of a 40/50 HP engine, examining the effects of speed, matrix/shutter configuration, and fuel mixture strength. | ||
| View original record | INCREASE IN EFFICIENCY OF 40/50 HP. COOLING SYSTEM WITH SPEED. SHEET 4. 20¾" matrix. Road speed. | δt | % difference from 'A'. | Critical atmospheric temperature. 20 M.P.H. - all closed. | 82.2ºC |… | ||
| Scan222 | Comparing EAC and Hispano steering systems and providing a status update on various car projects. | ||
| View original record | S E C R E T. X4214 To Hs. at Le Canadel. From GWH. Hs/GWH1/LG17.2.25. COMPARISON OF STEERING. X8430 EAC. AND HISPANO. Work is being carried on satisfactorily. 46-PK car should be finished early next… | ||
| Scan223 | Comparison of steering effort for a 93NK chassis versus a Hispano Suiza chassis. | ||
| View original record | COMPARISON OF STEERING EFFORT ROLLS ROYCE E.A.C.T. & HISPANO SUIZA EFFORT REQUIRED AT BALL END OF STEERING LEVER TO TURN FRONT WHEELS ON STATIONARY. BALL END OF SIDE STEERING ARM MOVED THRO' 3" IN… | ||
| Scan224 | The heavy steering issue in the E.A.C. 'V' series car, comparing it with the 40/50 and Hispano models. | ||
| View original record | H.R. 493a (50m) (D.B. 172 25-9-24) J.H.D. Y4214 EXPERIMENTAL REPORT. Expl. No. REF Hs1/LG13.3.25. To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. SECRET. E.A.C. 'V' SERIES -… | ||
| Scan225 | Comparing the steering effort and components of Hispano and EAC cars against the 40/50 model. | ||
| View original record | R.R. 493A (50m) (D.B. 173 25-9-24) J.H.D. -2- EXPERIMENTAL REPORT. Expl. No. REF hs1/LGL3.3.25. turn. We have measured the rise and fall of the axle on the Hispano car due to the inclination of the… | ||
| Scan226 | Secret internal memorandum discussing the difference in 'V' series steering and the effect of weight lifting. | ||
| View original record | To Hs. from DA. S E C R E T. f4214 DA3/M18.3.25. 'V' SERIES. STEERING. X.9430 X.4214. We have seen a telegram from BY. suggesting that the difference in the 'V' series steering is due to lifting the… | ||
| Scan227 | Secret memorandum discussing heavy steering issues, comparing steering box types, and proposing various solutions. | ||
| View original record | X4214 To DA. E. RG. from R. c. to CJ. BY. Hs. c. to PN. CWB. SECRET. E. A. C. STEERING. X.8430 X.4214 Regarding heavy steering when standing this has been tested, not to be the different front axle,… | ||
| Scan228 | Continued memo discussing design options for a pendulum lever shaft and associated components. | ||
| View original record | contd :- -2- The 3 short roller bearings might be adopted which should certainly put to rest any doubt of friction in the pendulum lever shaft. I understand we have adopted the longer worm so that the… | ||
| Scan229 | Graph showing the load in the side steering tube against tyre pressure for a Hispano-Suiza steering system. | ||
| View original record | HISPANO-SUIZA STEERING. X4214 26/3/25. LOAD IN SIDE STEERING TUBE WHEN TURNING A RT. ANGLE CORNER ON DRY ROADS. NEW DUNLOP TYRES. lbs. LOAD IN SIDE STEERING TUBE. TYRE PRESSURE lbs/[]". TENSION L.H.… | ||
| Scan230 | Comparison of steering leverage between the E.A.C.V Series and Hispano steering systems. | ||
| View original record | E.A.C.V Series & Hispano Steering. The steering leverage of the E.A.C.V Series & the Hispano has been determined by comparing the angular displacement of the stub axles with the rotation of the… | ||
| Scan231 | Road tests for the Hispano steering system, measuring loads in the steering tube during turns. | ||
| View original record | The lay out of the Hispano System. Particulars of the steering box will be given later. A few tests were taken on the road to determine the load in the side steering tube when turning a rt. angled… | ||
| Scan232 | List of required files, detailing reference numbers and their corresponding subject matter. | ||
| View original record | Other files required SSAt:S.3.? X 8040. Pistons &* Rings S4 S4DL X 1692. H.P. Various Cars S4DL S4 X 1761. Camshafts X 500. 20/25 HP General. S4DL S.1 20/25 Engine & Chassis General " X 500b. 20/25… | ||
| Scan233 | List of various engine components with associated part and reference numbers. | ||
| View original record | Goshawk. Camshaft. 507-53D.L.S.4. Crankshaft. 517✓ " Valves & Fittings. 554✓ " Pistons 536✓ " Lorraine. 1078? 54D.L.S.3 PII & Bentley Valves. ✓1427 .54 Valves & Tappets ✓2764 Valves & Fittings 422… | ||
| Scan234 | Reverse of a photograph identifying a key plan for an engine. | ||
| View original record | First of the Key plan of 80 P.S Water Engine - | ||
| Scan235 | List of parts and reference numbers taken to a location named Clan on a Monday. | ||
| View original record | TAKEN TO CLAN Monday X 2764 ✓ X 1427 ✓ 536 ✓ 554 ✓ - 517 ✓ 507 ✓ 4227 ✓ 4499 - Crankshafts SSDL X 8040 - Pistons & Rings SSDL | ||
| Scan236 | 'EAC' steering, detailing the force required to make turns at speed compared to other models. | ||
| View original record | R.R. 493a (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF Hsl/LGB.4.25. To R. from Hs. c. to CJ. BJ. c. to RG. EV. c. to DA. E. c. to Wor. EY. S E C R E T. 'EAC' STEERING.… | ||
| Scan237 | Comparing steering effort in lbs for left and right turns on various car models with different tyre pressures and axle weights. | ||
| View original record | R.R. 493a (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -2- Expl. No. REF: Hs1/LG6.4.25. EAC. 'V' series with various tyre pressures. | | 70 lbs. | 50 lbs. | 30 lbs. | |---|---|---|---| | R.H.… | ||
| Scan238 | Tests conducted to address heavy and unstable steering issues. | ||
| View original record | H.R. 493a (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -3- Expl. No. REF: Hsl/LG6.4.25. Another point is that the EAC. 'V' series is also heavy if the car is driven backwards. If the stiffness… | ||
| Scan239 | Steering efficiency, wear, and leverage. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -4- Expl. No. REF Hsl/LG6.4.25. We have now an arrangement by which we can measure the effort on the steering wheel so that we shall be… | ||
| Scan240 | Graph showing the percentage increase of leverage for Hispano steering relative to the E.A.C. V series. | ||
| View original record | HISPANO STEERING. INCREASE OF LEVERAGE REL. TO E.A.C. V PERCENTAGE INCREASE OF HISPANO LEVERAGE RELATIVE TO E.A.C. V SERIES ROTATION OF STEERING WHEEL. L.H. LOCK. R.H. LOCK. Stamp: ROLLS-ROYCE LTD / 8… | ||
| Scan241 | Graph showing the experimental results of Hispano-Suiza steering leverage. | ||
| View original record | HISPANO-SUIZA STEERING LEVERAGE. EXPL. RESULTS. STEERING LEVERAGE. INSTANTANEOUS RATIO. ROTATION OF STEERING WHEEL / ROTATION OF STUB AXLE. ROTATION OF STEERING WHEEL. L.H. LOCK R.H. LOCK HISPANO. NR.… | ||
| Scan242 | Graph of steering leverage versus steering wheel rotation for the E.A.C. V series. | ||
| View original record | E.A.C. V SERIES STEERING LEVERAGE. STEERING LEVERAGE. INSTANTANEOUS RATIO: ROTATION OF STEERING WHEEL / ROTATION OF STUB AXLE. ROTATION OF STEERING WHEEL L.H. LOCK R.H. LOCK CURVE GIVEN FOR MEAN OF… | ||
| Scan243 | Design, performance issues, and potential improvements for the 'V' Series steering system. | ||
| View original record | X4214 S E C R E T. To DA. & HS. from R. c. to CJ. BJ. PN. c. to E. RG. EY. c. to CWB. 'V' SERIES STEERING. (1) One must realise that any departure from vertical pivots centre point steering must make… | ||
| Scan244 | Technical note on steering geometry, specifically addressing leverage on the L.H. lock. | ||
| View original record | contd :- -2- lifted, push the road wheel over the pivot, or make the pivot as vertical as possible, even departing somewhat further from centre point steering. (11) The levers carrying the cross tube… | ||
| Scan245 | Vehicle overheating complaint and the value of historical test data. | ||
| View original record | R.R. 493a (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. X4214 REF Hs1/1014.5.25. To CH: from Hs. OVERHEATING. X766 X485 With reference to CJ2/E12.5.25. We attach herewith a reply in… | ||
| Scan246 | Cooling test methods and the reasons for abandoning louvered bonnets. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. o2o Expl. No. REF: Hs1/LG14.5.25. The methods we have now adopted for testing the cooling will show us differences of 2 or 3% and we can… | ||
| Scan247 | Engine overheating, analysing the effects of fan belt tension and gear selection when hill climbing. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF: Hsm1/LG14.5.25. RE: OVERHEATING. With reference to H1/TB/11.5.25. We should like to point out that we do not consider,… | ||
| Scan248 | Potential reasons for a car overheating due to a different driving method. | ||
| View original record | contd;- -2- Hs/Rml/LG14.5.25. his chances of over-heating are likely to be increased; this may possibly explain H's recent trouble, whereas previously, by adopting a different method of driving, his… | ||
| Scan249 | Chart comparing overheating test results for the Silver Ghost and Hispano Suiza models. | ||
| View original record | OVERHEATING TESTS SILVER GHOST AND HISPANO SUIZA CONDITIONS OF TEST ATMOSPHERIC TEMPERATURE AT WHICH THE COOLING WATER WILL INEVITABLY BOIL DRIVING FOR SUFFICIENTLY LONG ON FULL THROTTLE AT THE SPEED… | ||
| Scan250 | Arrangement diagram for a Hispano-Suiza steering box in a car. | ||
| View original record | Ex. 399 BRACKET FRAME BRACKET CRANKCASE ARRANGEMENT OF HISPANO-SUIZA STEERING BOX IN CAR Ex. 399 ROLLS-ROYCE LIMITED. 24 JAN 1918 | ||
| Scan251 | Confirming a verbal arrangement to adapt batteries for a Hispano car. | ||
| View original record | To RHC. from EFC. X4214 EFC1/T20.6.25. X. 4214. BATTERIES FOR HISPANO CAR. This will confirm our verbal arrangement that you will have the cable ends and the battery lugs of the two batteries adapted… | ||
| Scan252 | Comparing their steering system with Hispano's and discussing potential improvements. | ||
| View original record | To Hs. from R. c. to CJ. BJ. c. to Wor. LHS. c. to BY. EPY c. to PN. CWB. 4414 R2/ M29.6.25. STEERING. X.8430 X.4214 X.8410 With reference to the steering it has always been thought that our steering… | ||
| Scan253 | Steering system improvements, including a new pendulum lever design and competitor analysis. | ||
| View original record | contd :- -2- Some schemes have advantages in one direction, other schemes have advantages in other directions. In EAC.7, we shall have considerable change by fitting our unique system of damped… | ||
| Scan254 | Quarterly note regarding the disposal of Hispano and Mercedes cars from the Experimental Department. | ||
| View original record | x4214 To Hs. from BJ. BJ8/H7.7.25. Quarterly Note. Cars in Experimental Dept. X180 *4214 x407 With reference to Hs6/Lgl.7.25, we should like to dispose of the Hispano and Mercedes as soon as you have… | ||
| Scan255 | Cross-sectional drawing of a Hispano type side steering tube with dimensions and load specifications. | ||
| View original record | HISPANO TYPE SIDE STEERING TUBE. X42414 1.525 .375 4.8 FREE LENGTH LARGE DIAM. 1.955 SMALL DIAM. 1.975 LENGTH IN COMPRESSION IN S.S. TUBE NORMAL. 1.450 1.450 LOAD FOR DEFLECTION OF .100" 33.0 lbs 10… | ||
| Scan256 | Explaining the continued use of Hispano and Mercedes cars for experimental purposes. | ||
| View original record | +4214 To B.J. from Hs. Hs1/LG8.7.25. CARS IN EXPL: DEPT: X1SO The reason we have not got rid of the Hispano and Mercedes cars is because they are still useful as experimental cars. At the present time… | ||
| Scan257 | Technical memorandum discussing different steering gear designs, including irreversible boxes and the Marles system. | ||
| View original record | To Hs. from R. +4214 c. to CJ. BJ. c. to RG. BY. c. to DA. E. c. to PN. CWB. STEERING. RL/M10.7.25. X.8430 X.4214 X.4094 (1) We shall have a slightly slower and definitely more irreversible box. This… | ||
| Scan258 | The disapproval of bonnet louvres on Mr. Royce's car and a request for new drawings. | ||
| View original record | 4214 To BY. from DA. c. to Hs. DA3/M14.7.25. RE. BONNET LOUVRES. X.8260 X.5260 X.4214 The louvres on Mr. Royce's bonnet were not approved of. We should like to see a drawing of these louvres as Mr.… | ||
| Scan259 | Request to determine the instantaneous steering leverage on a Hispano car at full left-hand lock. | ||
| View original record | To BY/HEB. from Hs/Rm. 4214 Hs/Rnl/LG1 6. 7. 25. HISPANO STEERING. We wish to know the instantaneous steering leverage on the Hispano car on full left-hand lock. By instantaneous leverage, we mean,… | ||
| Scan260 | Investigating and damping low and high speed steering wobbles. | ||
| View original record | H.R. 493a (50 H) (D.D. 31. 12-6-25) J.H.L. EXPERIMENTAL REPORT. Expl. No. +42 H REF: Hs4/LG17.7.25. To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. STEERING. 4214 / x657 We find we… | ||
| Scan261 | Steering oscillation, the effect of a damped pendulum lever, and weak buffer springs. | ||
| View original record | EXPERIMENTAL REPORT. -2- Expl. No. REF HS4/LG17.7.25. which causes violent oscillation of the steering. The damped pendulum lever has the effect of preventing the oscillation of the steering wheel… | ||
| Scan262 | Graph chart recording of a battery discharge test with handwritten calculations. | ||
| View original record | 22-7-25 Fco, [torn]uiza battery 103 lbs Average amperes = 6.48 Hours = 14.75 Ampere hours - 95.6 -930. 1.80v REG'D TRADE MARK 'MEGGER' | ||
| Scan263 | Design and fitment of bonnet louvres for the New Phantom model. | ||
| View original record | To BY. from DA. c. to Hs. X4214 DA2/MS. 8. 25. RE. NEW PHANTOM LOUVRES. X.8260 X.766 X.4214 Referring to BY/C8/K17.7.25., we believe that R. does not approve of the general use of louvres, and hopes… | ||
| Scan264 | The discharge tests performed on a Hispano Suiza battery. | ||
| View original record | RR 300 (20 Bks.) (SK 354 5-12-22 MP 264049) 108677 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To E.F.B. Order No. Customer's No. Re J.B. 112. Re Tests on Hispano Suiza Battery. This battery was taken off the… | ||
| Scan265 | Instruction sheet noting a battery is in good condition and ready to be refitted. | ||
| View original record | RR 300 (20 Bks.) (SK 354 5-12-22 MP 264049) 108678 ROLLS-ROYCE LIMITED. INSTRUCTIONS. II To Order No. Customer's No. Re By the above results it will be seen that this battery is still in good… | ||
| Scan266 | Requesting information on the maximum distance between the wheel contact point and pivot for a new, lighter front axle design. | ||
| View original record | ferry To Hs. from DA. DA1/M4.9.25. FRONT AXLE. X.8420 X.5420 X.4214. A matter of great important to us in the design of the new front axle of reduced weight etc. is the distance we can have between… | ||
| Scan267 | High-speed steering wobbles in a Hispano Suiza vehicle. | ||
| View original record | EXPERIMENTAL REPORT. Expl. No. f4214 REF: Ha/Rad/LG10.9.25. To R. from Hs/Rn. c. to CJ. BJ. c. to RG. E. c. to DA. EY. c. to Wor. HIGH SPEED STEERING WOBBLES 457 Hispano Suiza. We have made the… | ||
| Scan268 | High-speed steering wobbles, comparing tests on a Hispano car with a Phantom. | ||
| View original record | R.R. 493a (50 Bks 100 21. 10-25) J.H.V. EXPERIMENTAL REPORT. Expl. No. +4214 REF Hs/Rm2/LG11.9.25. To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. HIGH SPEED STEERING WOBBLES. +457… | ||
| Scan269 | Investigating high-speed wobbles by comparing a Hispano car to an EAC and testing steering modifications. | ||
| View original record | R.R. 493A (50 H) (D.D.M. 19-6-25) J.B.D. EXPERIMENTAL REPORT. Expl. No. 4214 REF. Hs/RM/LG14.9.25. To R. from Hs/Rm. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. HIGH SPEED WOBBLES +457 We… | ||
| Scan270 | Investigating wheel wobble using a dynamometer and chronograph. | ||
| View original record | R.R. 493a (50 Bks) H.D.D. 11. 10-25) J.H.D. EXPERIMENTAL REPORT. -2- Expl. No. REF Hs/Rml/LG14.9.25. tinctly objectionable. We have not tried this test on a second car yet; it appears to us so far… | ||
| Scan271 | Comparing the weights of front axle and brake components. | ||
| View original record | EXPERIMENTAL REPORT. Expt. No. X4214 REF: Hs8/LG17.9.25. To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to BA. BY. c. to Wor. COMPARATIVE WEIGHTS OF FRONT AXLE COMPONENTS. Below are comparative weights… | ||
| Scan272 | Page 2, comparing the weights of hub and wheel components for different models. | ||
| View original record | R.R. 493A (50 M) (D.D. 21. 12-9-23) J.R.D. EXPERIMENTAL REPORT. -2- Expl. No. REF Hs/L/017 9.9.25 | DESCRIPTION. | T.series. Silver Ghost. lbs.ozs. | New Phantom. lbs.ozs. | Hispano. lbs.ozs. |… | ||
| Scan273 | Design and effectiveness of a louvered bonnet compared to shutters. | ||
| View original record | To Hs. from DA. 4214 DA12/M23. 9.25. LOUVRED BONNET X. 8260 X.4214 The louvres following on the lines of the Hispano which we saw on the bonnet of 7-EX, were a considerable improvement on the previous… | ||
| Scan274 | Problems with Autovac tanks, suggesting modifications, and requesting further designs. | ||
| View original record | To HS; from DA/EV. c. to CJ. BJ. H. X4214 DA/EV1/M28.9.25. RE. AUTOVAC TANKS. X.3579 X.3593 X.4214 We have examined an autovac and notice that each time the autovac ejects its petrol into the… | ||
| Scan275 | Urgent order request for searchlight lamps to be used on a Hispano-Suiza car. | ||
| View original record | XL4214 Wd. from EFC. EFC3/T19.1.26. X.4214 - HISPANO-SUIZA CAR. Will you kindly order up from the S.E.V. Company for use on the Hispano-Suiza car :- 6 Searchlight lamps, 12/15 volts - 120 B., centre… | ||
| Scan276 | Four broad improvements made to the New Phantom steering system. | ||
| View original record | To Hs. from Da. c. to BY. X4214 DA2/M4.3.26. NEW PHANTOM STEERING. X.8430 X.4214 Replying to Hs3/LG2.3.26., there have been four broad improvements made in the steering by the recent modifications :-… | ||
| Scan277 | Improvements to a worm and nut mechanism, including lubrication, thread design, and comparison to a Hispano model. | ||
| View original record | contd :P -2- varies as far as we can see due to the oil being squeezed out. We are sending a suggestion for giving a courser thread so that there may be a better chance of keeping the oil in on… | ||
| Scan278 | Technical memorandum discussing the design, performance, and potential improvements of the E.A.C. steering system. | ||
| View original record | To DA. & Hs. from R. c. to CJ. BJ. RG. c. to E. BY. HM. X4214 R1/M17.4.26. E. A. C. STEERING. X. 8430 So far as I know nothing has been shewn to be wrong with EAC. steering box. I believe this is a… | ||
| Scan279 | Urgent internal request to order searchlight lamps for a Hispano car. | ||
| View original record | X4214 To Wd. from EFC. EFC2/T30.9.26. HISPANO CAR. Will you kindly order up from the S.E.V. Company 6 Searchlight lamps, 12/15 volts - 120 B. centre contact. These are required for use on the above… | ||
| Scan280 | To the Pattern Shop requesting a new battery box for an experimental Hispano chassis. | ||
| View original record | To Pattern Shop. from EFC. X4214 EFC/T4.1.27. Herewith we send to you the old battery box from our experimental Hispano chassis. Will you please have a similar new box made to O/N.735. EFC. | ||
| Scan281 | Engine detonations on a Hispano engine. | ||
| View original record | X4214 Re detonations on Hispano The engine detonates with the water boiling to the same degree as with water at normal temperature. In both cases the detonation dies out at 40 MPH, picking up from 10,… | ||
| Scan282 | Request to the Pattern Shop to make a new battery box for an experimental Hispano chassis. | ||
| View original record | Remarks on the running generally Driver X4214 To Pattern Shop. EFCL/T25.2.27. Herewith we send to you the old battery box from our experimental Hispano chassis. Will you please have a similar new box… | ||
| Scan283 | Tests and observations on high-speed wobbles, particularly the ineffectiveness of front shock dampers under certain tyre conditions. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to RG. E. c. to DA. BY. c. to OY. X4214 Hs/Rml/LG14.6.27. HIGH SPEED WOBBLES. X235 X457 It has been a source of surprise to us that beyond a certain point,… | ||
| Scan284 | Results of tests on vehicle wobble, frame twisting, and the effects of engine mass, inertia, and shock dampers. | ||
| View original record | contd :- -2- The amplitude of the wobble was not very great. Reducing the equivalent engine mass increased the amplitude of the wobble appreciably. We also ascertained that if we increased the moment… | ||
| Scan285 | Test report page comparing oscillation and wobble characteristics between an EAC.V11 and a Hispano car. | ||
| View original record | contd :- -3- (A) | (B) Periodic time for oscillation. | Equivalent road speed wobble in step. | Periodic time for oscillation. | Equivalent road speed wobble in step. EAC.V11. | .224 secs. | 26.8 MPH.… | ||
| Scan286 | Methods to eliminate high-speed wobbles by adjusting front and rear dampers and frame stiffness. | ||
| View original record | contd :- -4- (2) If ever obstinate cases of high speed wobbles arise, it is of no use to attempt to eliminate them by increasing the front damper loading unless the rear of the car is also suitably… | ||
| Scan287 | Blueprint graph and diagrams illustrating frame rigidity and periodicity tests. | ||
| View original record | TORQUE LBS / FT. 1800 1600 1200 800 400 HISPANO FRAME E.A.C.7 FRAME REAR AXLE CLAMPED SOLID TO FRAME. 1° 2° 3° 4° FRAME DEFLECTION ANGLE θ 3.5° P θ FRAME RIDIGITY AND PERIODICITY. | ||
| Scan288 | Instruction memo regarding work to be carried out on a Hispano-Suiza car by Sanderson & Holmes Ltd. | ||
| View original record | X 4214 To O.O. from Hs. Hs5/LG5.7.27. HISPANO-SUIZA CAR. Please instruct Messrs. Sanderson & Holmes Ltd. to carry out work in connection with the above car as per attached estimate. Hs. £82. 16. 6. | ||
| Scan289 | Correction regarding the torsional stiffness of the Hispano frame compared to the 40/50 model in relation to high-speed wobbles. | ||
| View original record | To DA: from Hs/Rn. F4214 Hs/Rm3/LG11.7.27. 4457. HIGH SPEED WOBBLES. In our Hs/Rnl/LG14.6.27. page 3, we stated that the Hispano frame is weaker in torsion than the 40/50. This is incorrect. It is… | ||
| Scan290 | Return of a re-painted Hispano Suiza car for selling purposes. | ||
| View original record | To C. from Hs. c. to Sg. X4214 Hs6/LG29.8.27. HISPANO SUIZA CAR. In a few days we propose returning to you the Hispano Suiza car for you to sell, as we have now finished with it. We have had the car… | ||
| Scan291 | Short internal memo acknowledging the contents of a communication regarding a Hispano Suiza car. | ||
| View original record | S/W (Hs). X4214 C1/LH1.9.27. HISPANO SUIZA CAR. Hs6/LG29.8.27. ----------------- Thanks for your memo, contents of which are noted. C. 4-0 1-9-27. | ||
| Scan292 | Design characteristics of 'Straight Eight' and 'Hispano Six' engines. | ||
| View original record | Hs. from R. c. to BJ. Y 4219 R4/M7.9.27. X.4214 X.4219 X.3531. X.634. "STRAIGHT EIGHT" ENGINES, AND HISPANO SIX. -------------------------- These should be watched by you and Hs/Rn. with extreme… | ||
| Scan293 | Inquiry regarding the expected arrival of a Hispano Suiza car for sale. | ||
| View original record | x4214 S/W. Cx/LJ2/GM21.9.27. Re - Hispano Suiza Car. With reference to your Hs6/LG29.8.27. to C., in which you inform us that there is an Hispano Suiza coming down from Works in a few days for us to… | ||
| Scan294 | Delay in sending a Hispano Suiza car due to engine experiments. | ||
| View original record | W/S. To Cx. from Hs. Y4214 Hs1/LG22. 9.27. HISPANO SUIZA CAR. With reference to Cx/LJ2/CM21.9.27. We are afraid it will be a few weeks now before we can send you the Hispano Suiza car. There are… | ||
| Scan295 | Report comparing the weight of tubular section connecting rods and piston assemblies of Rolls Royce, Hispano, and Lorraine cars. | ||
| View original record | To R. from Hs/Rn. c. to BJ. Wor. c. to E. DA. c. to BY. X4214 Hs/Rm3/LG18.10.27. TUBULAR SECTION CONNECTING RODS. X8030 X5030 In a previous report comparing the reciprocating specific weight of the 20… | ||
| Scan296 | Comparison table of engine component specifications for 20 HP, Lorraine, 40/50 HP, and Hispano models. | ||
| View original record | DETAIL. | 20 HP. | Lorraine. | % diff: of Lorraine wt. | 40/50 HP. | Hispano. | % diff: of Hispano wt. Conn: rod length. | 7.95" | 9.062" | | 11.5" | 11.8" | Total connecting rod weight. | 1.551 |… | ||
| Scan297 | Instruction to Lillie Hall to receive one Hispano Suiza car for the Sales Department. | ||
| View original record | X424 Hs/LG. Expl: Dept: 1st. Nov. 1927. To Lillie Hall. Please receive - 1 Hispano Suiza car for Sales Dept. complete with all tools and spares. Hs. | ||
| Scan298 | Sending a Hispano car to Lillie Hall to be sold. | ||
| View original record | To R. from Hs. c.c. to C. c.c. to Wor. V4214 Hs3/LGL.11.27. HISPANO CAR. We are sending this car to Lillie Hall for it to be sold. We do not consider we have any further use for this car as regards… | ||
| Scan299 | Receiving a Hispano Suiza car for the Sales Department, with a handwritten note of receipt and a fault. | ||
| View original record | ROLLS-ROYCE, LTD. DERBY. TELEGRAMS: "ROYCAR, DERBY" TELEPHONES: DERBY 1320 (6 LINES) IN YOUR REPLY PLEASE QUOTE ~4214 Hs/LG. Expl: Dept: 1st. Nov. 1927. To Lillie Hall. Please receive - 1 Hispano… | ||
| Scan300 | Technical discussion on the design of the EAC.10 induction pipe and cylinder head, comparing 4-port and 6-port arrangements. | ||
| View original record | R. from E. c. to BJ. Hs. +4214 E4/M17.1.28. EAC.10 INDUCTION PIPE AND CYLINDER HEAD. X.7070 X.7050 X.4214 When in Derby recently we had a discussion with Mr. Lovesey on the above and as a result asked… | ||
| Scan301 | Page discussing the use of an undertype slot for 4 or 6 port induction pipes, referencing blueprint LeC.2509. | ||
| View original record | contd :- -2- The question of using the undertype slot applies of course to either 4 or 6 port induction pipes. Blueprint LeC.2509 herewith. E. | ||
| Scan302 | Valve lift diagrams, formulas, and clearances for car and aero engines. | ||
| View original record | E. RG. BY. Hs. from R. c. to BJ. Wor. X4214 R8/M17.1.28. X.4214 X.3616 X.4336 X.8060 VALVE LIFT DIAGRAMS FORMULA. The results from the latest Condor valve lift suggest that we should not depart from… | ||
| Scan303 | Improvements to the Phantom steering system, including customer feedback and comparisons with other cars. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to E. DA. c. to SY. OY. Y4214 HES/LG23. 4. 28. PHANTOM STEERING. X. 8430 X. 4214 X. 7430 X. 5430 The steering ratio of the 6½ litre Bentley is 16/1. It is just over 3… | ||
| Scan304 | Steering characteristics, skid correction, parking, and comparisons between different car models. | ||
| View original record | contd :- -2- some reason skids across the road at 45°, to correct that skid it means the steering should be turned well over on the lock in the opposite direction. With a low geared steering it is not… | ||
| Scan305 | Improvements for the 'Phantom' steering system, comparing it to Hispano-Suiza steering and suggesting hydraulic damping. | ||
| View original record | Hs. from R. c. to BJ. BY. DA. +4214 R11/M25.4.28. X.7430 X.4214 X.8430 X.7420 PHANTOM STEERING. With reference to Hs3/LG23.4.28., I quite agree that enormous improvement has been made in the steering… | ||
| Scan306 | Offer from Solex to test their carburetters. | ||
| View original record | Hs. from R. c. to BJ. BY. FL. 4214 R3/M28.4.28 SOLEX CARBURETTERS. X. 3603 X. 4214 The Solex people have offered to send us a set of their carburetters to test. This make of instrument is used on the… | ||
| Scan307 | Inquiry regarding a tyre inflation pump for the Phantom model. | ||
| View original record | To Ps. from Hs/Rn. X4214 Hs/Rm3/LG7.6.28. TYRE INFLATION PUMP. +993 We believe we have at some time or other seen a tyre pump which fitted into the position of the starting handle on a Hispano car. We… | ||
| Scan308 | The nitrogenisation of steel process for crankshafts and cylinders observed at the Hispano Works. | ||
| View original record | Y4214 Hs/Rm1/LG13.10.28 To R. from Hs/Rm. c. to BJ. Wor. c. to E. DA. c. to RG. BY. PARIS SHOW. X3609 NITROGENISATION OF STEEL. X4469 Through Col. Hawkins and the courtesy of Mons. Lacoste we were… | ||
| Scan309 | The nitrogen hardening process observed at the Aubert & Duval plant, detailing its application on automotive and aero parts. | ||
| View original record | contd :- -2- We then went over the plant of Aubert & Duval who are the Paris licencees of the process and have done Hispano's development work. We there found being treated gears of every description… | ||
| Scan310 | Cheap and simple steel hardening process, its benefits over case-hardening, and potential collaboration with French and British partners. | ||
| View original record | contd :- -3- able to give the correct machining allowance on any normal part if they have the drawings. Summarising the position, the process appears to be very cheap and simple. It appears to have… | ||
| Scan311 | Sample of a French Hispano cylinder made with a nitrided alloy, sent for comparative testing. | ||
| View original record | Hl. from Hs. c. to BY. c. to Wor. X 4214 Hsl/LG31.12.28. NITRD ALLOYS. V4469 Herewith sample section of Hispano cylinder which we have obtained from France which has been produced and treated in this… | ||
| Scan312 | Confirming that cylinder liners were ground after hardening to remove the brittle surface. | ||
| View original record | To BY. from Ha/Ha. c. to Hl. R. c. to HG. Mor. X4214 Ha/Ra4/LGS.1.29. X4469 With reference to Hl.11/FJWS.1.29. In our report Ha/Mal/LGL3.10.28. we stated that the cyl. liners were ground after… | ||
| Scan313 | Brittle surface layer on nitro alloy steel and the necessity of grinding after nitriding. | ||
| View original record | To Wor. from Hs/Rn. c. to BY. RG. c. to E. DA. c. to Hl. 44214 Hs/Rn2/LG4.2.29. NITRO ALLOY STEEL. 44469 With reference to the question of the brittle surface layer which has been troubling us on the… | ||
| Scan314 | Letter from Aubert & Duval discussing the grinding of nitro-hardened steel components. | ||
| View original record | Aubert & Duval, Freres, 62, Avenue de la Republique, Paris. Messrs. Rolls-Royce Ltd., Derby. Sirs, We are in receipt of your letter of the 28th. ult. It is quite unnecessary to grind the surface of… | ||
| Scan315 | Visit by Sir Henry Seagrave with a new Hispano Suiza 'Barcelona' model, detailing its specifications and a test run comparison. | ||
| View original record | X4214 To R. FROM Hs/Rn. c. to E. Da. c. to Wor. Dy. c. to SS. Hs/Rn.3/MJ. 20.8.23. X4214. X7770. HISPANO SUIZA. -------------- Sir Henry Seagrave called at the works on the 19th.inst., with the latest… | ||
| Scan316 | Test report assessing a car's acceleration, maximum speed, steering, and braking characteristics. | ||
| View original record | -2- ACCELERATION: The top gear acceleration of the car is better than anything we have previously tried. This is to be expected owing to the large engine displacement and the fact that they appear to… | ||
| Scan317 | Summary of test results comparing a Hispano sports car to a modified Continental Phantom, focusing on braking and overall performance. | ||
| View original record | -3- Squeaked every application. (Seagrave stated that he had tried three with similar results.) The amount of front braking had obviously been increased, but the results were not very good owing to… | ||
| Scan318 | Letter to Capt. Owen of Jack Barclay & Co. Ltd., comparing the cooling of a 'Hispano' car with the Phantom II and inviting him to the works. | ||
| View original record | X1068 Expl. Dept. Hs/Bn.3/MJ. July 19th.1930. Capt. Owen, Messrs. Jack Barclay & Co. Ltd., George Street, Hanover Square, LONDON. W.1. Dear Capt. Owen, I am very much indebted to you for allowing me… | ||
| Scan319 | Cross-reference note for a report on a car at the Olympia Motor Show. | ||
| View original record | X4214 October 1931. SEE ALSO FILE X.631 FOR REPORT OF THIS CAR AT OLYMPIA MOTOR SHOW. (REF: Hs/Rm.1/AD.26.10.31.) Hs/MJ. | ||
| Scan320 | Confidential memo regarding Hispano-Suiza, forwarding an attached note for information. | ||
| View original record | S/W To Rg. from F. Copy to Wor. Hs. By. 84214. F6/JL.3.11.32. CONFIDENTIAL. Re: HISPANO-SUIZA. Please see the attached copy of a note from MNG. regarding the above, for your information. Attachment:-… | ||
| Scan321 | Confidential memo discussing the weights and material composition of Hispano-Suiza Xbrs and Ybrs engines. | ||
| View original record | C O P Y. To F. CONFIDENTIAL. MNG/s/2.11.32. R. Re: HISPANO-SUIZA. With reference to your F11/JL.26.10.32 we have made enquiries re the weights of Xbrs and Ybrs engines. We believe the weight of the… | ||
| Scan322 | The independent wheel suspension system of the André Dubonnet car. | ||
| View original record | Y 1068 E. from HS/Rm. E. to OG. C. to Wor. C. to Ev. C. to Dx. C. to Gy. C. to W.A.R. X4214. HS/Rm. S/MA. 23.11.32. HISPANO SUIZA. INDEPENDENT WHEEL SUSPENSION. ANDRE DUBONNET. Dubonnet has been… | ||
| Scan323 | Report summarizing impressions on M. Dubonnet's independent wheel suspension and considering its use on a Phantom II. | ||
| View original record | -2- Hs/Rm.8/MA.23.11.32. Cont'd. Other advantages were the good steering lock and excellent torque control of the front axle when braking. "Jellying" seemed noticably absent, but this may or may not… | ||
| Scan324 | Specification sheet detailing suspension characteristics and measurements. | ||
| View original record | -3- Ha/Rn.S/MA.23.11.32. Cont'd. (1) Suspension. (a) Spring Rating. Front 100 lbs/1" Rear 80 lbs/1" (b) Wheel Movement. Allowed. The "stop" is the coil springs coming choc a bloc. Front. Bump 2½"… | ||
| Scan325 | Design document detailing vehicle weight distribution and steering system characteristics. | ||
| View original record | -4- Cont'd. (f) Distribution of WEIGHT. The boxes containing the springs are located at the extremities of the chassis, their mass thereby increasing the value of K²/ab and reducing the pitching… | ||
| Scan326 | Two blueprint-style illustrations of drive transmission joints. | ||
| View original record | ORDINARY MECHANICS JOINTS TRANSMIT THE DRIVE, | ||
| Scan327 | Noting that the engine, gearbox and steering gear are standard Hispano parts, with a reference to a Paris 'Salon' report. | ||
| View original record | -6- Hs/Rm.8/MA. 23.11.32. Cont'd. Other Parts of the Car. The engine, gearbox, Steering gear etc., are standard Hispano parts. Other details of the spring arrangement etc., were given in Lid's report… | ||