Rolls-Royce Archives
| Identifier | Entry | ||
| Scan0 | The noise and power effects of a swan neck connection on a rear silencer. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H. D. ORIGINAL EXPERIMENTAL REPORT. COPIES TO: R.CJ B.J. WOR. By E. Da. EP PN. OY Expl. No. 3642 REF. Hs2/LG1.9.23. OBJECT OF TEST. In order to confirm Springfield… | ||
| Scan1 | The expansion of Goshawk 11 exhaust valves to determine required tappet clearance. | ||
| View original record | R.R. 493 (40 H) (SL 42 12.7.23). J.H., D. ORIGINAL EXPERIMENTAL REPORT. COPIES TO: (RCJ) Sd.W. (WER) (By) (E) (Da) (EP) Expl. No. 4226 4238 REF. Hs/1LG1.9.23. OBJECT OF TEST. To find the expansion of… | ||
| Scan2 | The expansion characteristics and performance of different engine valve types. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 4226 REF: Hel/L.G1.9.23. Umbrella shaped Valve 45° - expands .010". After running, this valve shows a very cool head, but a… | ||
| Scan3 | Recommendation to modify the valve design to 45° angle seats and to send samples for review. | ||
| View original record | contd:- -3- Hsl/LCL.9.23. --------------------- Our recommendation is that we continue to use the present design of valve modified to 45° angle seats. Scheme of proposed modification attached. We are… | ||
| Scan4 | Blank page with punch holes. | ||
| View original record | ", | ||
| Scan5 | Comparing the sparking performance of ignition coils in cases made from various materials. | ||
| View original record | ORIGINAL EXPERIMENTAL REPORT. R.R. 493 (40 H) (SL 42 12-7-23). J.H., D. COPIES TO: R.C.J. BJ. WOR. By. E. Da. EP. PN. OY. X.4079. Expl. No. X.3513. REF EFC1/T3.9.23. OBJECT OF TEST. Comparisone of the… | ||
| Scan6 | Temperature tests performed on ignition coils housed in cases made of different materials. | ||
| View original record | EFC. PB114. Sept. 1st 1923. TEMPERATURE TESTS OF COILS IN CASES OF VARIOUS MATERIALS. Tests have been made comparing the effect of temperature on the sparking of coils fitted into cases of stabalite,… | ||
| Scan7 | Test report on a coil connected to six graduated spark gaps, measuring performance over time. | ||
| View original record | -2- Contd. Test 1. In this test the coil was connected to the six spark gaps in the ordinary way, the gaps, however, being graduated from 6.5 mm. to 4.0 mm. in length, viz:- Gap No.1 6.5 mm. " No.2.… | ||
| Scan8 | Test report on the maximum regular sparking gap of different coil types during a heating-up process. | ||
| View original record | -3- Contd. Test 2. In this test an external gap was used, making it a practical reproduction of the test as carried out on the car. The six main gaps were set at 4.0 mm. and the maximum length of… | ||
| Scan9 | The temperatures of the dynamo, ignition coil, and condenser, measured using temperature-indicating sentinels. | ||
| View original record | To R & E. from EFC. c.c. OJ. & FH. c. EY. c. EP. ORIGINAL X4079 X4383 X4430 TEMPERATURES OF DYNAMO, IGNITION COIL AND CONDENSER FOUND BY MEANS OF TEMPERATURE INDICATING SENTINELS. We have arranged… | ||
| Scan10 | The Coshawk Bendix Drive, comparing its performance with the Bijur drive on a Trials Car and a 20 HP production car. | ||
| View original record | B.B. 493A (40 H) (SL 42 12-7-23). J.H., D. ORIGINAL. EXPERIMENTAL REPORT. Expl. No. 3592 REF: Ha3/LCS.9.23. To R. from Hs. c. to CJ. c. to EP. c. to HY. COSHAWK BENDIX DRIVE. X3592 EP. and myself… | ||
| Scan11 | Comparing the performance of a Bijur clutch with a cork washer clutch under various conditions. | ||
| View original record | R.B. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 3592 REF: Wa2/1/C5. 8.23. -2- Tests taken show that the Bijur clutch will creep. Comparative tests taken with cork washer for… | ||
| Scan12 | Receipt and experimental testing of P & R batteries for the Goshawk car. | ||
| View original record | To R AH, from EFC. c. CJ. & FN. c. EY. EP. DA. ORIGINAL EFC1/T5.9.23. X.4414P - P & R BATTERIES FOR GOSHAWK. We have recently received from Messrs. Peto & Radford three batteries of their BPH9 type… | ||
| Scan13 | Order for six-compartment moulded cell cases from Messrs. Peto & Radford for the 40HII model. | ||
| View original record | Contd. -2- EFC7/TD.9.23. Messrs. Peto & Radford are so confident of this themselves that they are prepared to take the risk of the expense of making up six-compartment moulded cell cases to our… | ||
| Scan14 | The comparison of different engine oils for power and consumption. | ||
| View original record | R.R. 403 (40 H) (SL 42 12-7-23). J.H., D. ORIGINAL EXPERIMENTAL REPORT. COPIES TO: (RCJ) B. WOR. By (E) Da. (EP) PN. OY. (Rg) Expl. No. X2245 REF. HS4/LG5. 9.23. OBJECT OF TEST. Comparison of… | ||
| Scan15 | Graphs comparing the performance of different oils in a 6-cylinder Eagle engine, showing power curves, oil consumption, and oil pressures. | ||
| View original record | 6 CYLINDER EAGLE POWER CURVES COMPARISON OF OILS TAKEN AT THE FINISH OF ENDURANCE TEST OF 1 HR FOR EACH OIL B.H.P CORRECTED 165 160 155 150 145 140 135 130 125 120 R.P.M 1400 1500 1600 1700 1800 1900… | ||
| Scan16 | Methods to prevent water loss from the radiator due to boiling. | ||
| View original record | R.R. 403 (40 H) (SL 42 12-7-23). J.H., D. ORIGINAL EXPERIMENTAL REPORT. sent out 6.9.23. COPIES TO: (RCJ) (DL.WCR.) (By) (E) (Da) (DR) AHS.GL. Expl. No. X766 X3456 REF: 1/LG21.S.23. OBJECT OF TEST. To… | ||
| Scan17 | Tests conducted to prevent water loss from the radiator due to boiling. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. REF: Hel/L.C.M.8.23. TESTS TO PREVENT LOSS OF WATER DUE TO BOILING. A series of tests were taken with various schemes to try… | ||
| Scan18 | Radiator modifications to measure and reduce steam and water loss. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. -2- EXPERIMENTAL REPORT. Expl. No. REF: Hal/LG21. 8. 23. 2. An additional top water pipe taken from the core plug holes near the valve pockets. This separate… | ||
| Scan19 | Test report detailing the results of radiator overflow tests under various conditions. | ||
| View original record | RADIATOR OVERFLOW TESTS. Conditions. Engine R.P.M. 1000 - full throttle. Water levelled up at 95° - 3 pints taken out. Water boiled for 5 mins. Test No. | Condition. | Water collected. | Steam. |… | ||
| Scan20 | Table of test results logging water loss from a cooling system under various conditions. | ||
| View original record | -2- | Test No. | Condition. | Water collected. | Steam. | Total water lost in cts. | lbs. load. | Remarks. |… | ||
| Scan21 | Heat losses to the jacket water of a 40/50 engine, and the factors influencing them. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H., D. ORIGINAL EXPERIMENTAL REPORT. COPIES TO: RCJ BJ. WOR. By E Da EP. PN OY. R Expl. No. X790 REF. Hs2/LG6.9.23. OBJECT OF TEST. Report on heat losses to the… | ||
| Scan22 | For Test 6, comparing clean and carbonised engines by measuring heat loss to the jacket water. | ||
| View original record | B.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT Expl. No. REF: Hs2/LG 6.9.23. Test 6. Comparison of clean and carbonised engines. See sheet 5. METHOD EMPLOYED FOR MEASURING THE HEAT… | ||
| Scan23 | Engine heat flow, summarising test results for minimising loss through cooling water. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H. D. EXPERIMENTAL REPORT. page 3. Expl. No. REF: Hs2/LG6.9.23. These curves are plotted on an H.P. base as they then give a comparison of heat flow under throttled… | ||
| Scan24 | Test results for a 40/50 HP test engine, showing thermal efficiency, power, and heat balance under high compression. | ||
| View original record | SHEET 1. HIGH COMPRESSION. THERMAL EFFICIENCY, POWER ETC. OF 40/50 HP. RR TEST ENGINE. COMPRESSION RATIO 4.4. FUEL 'SHELL' NO.2. S.G. .752. CAL.VALUE (LOWER) 19,000 B.Th.U's/LB. First Table: R.P.M. |… | ||
| Scan25 | Table showing heat distribution as a percentage of initial heat supply at various engine RPMs. | ||
| View original record | SHEET 1. CONTD:- HEAT DISTRIBUTION AS PERCENTAGE OF INITIAL HEAT SUPPLY. R.P.M. | 500 | 1000 | 1500 | 2000 Thermal equt. of work done. | 18.3 | 19.90 | 20.45 | 19.8 Loss to engine friction. | 3.7 |… | ||
| Scan26 | Test data on the thermal efficiency and power of the 40/50 test engine at low compression, including a heat balance analysis. | ||
| View original record | SHEET 2. LOW COMPRESSION (PRESENT STD.) THERMAL EFFICIENCY, POWER ETC. OF THE 40/50 RR. TEST ENGINE. COMPRESSION RATIO 3.9 - ENGINE CLEAN - FUEL 'SHELL' NO.2. S.G. .752. CAL.VALUE (LOWER) 19,000… | ||
| Scan27 | Table showing heat distribution as a percentage of heat supplied at various engine speeds (RPM). | ||
| View original record | SHEET 2. contd :- HEAT DISTRIBUTION AS PERCENTAGE OF HEAT SUPPLIED. | | 500 | 750 | 1000 | 1250 | 1500 | 1750 | 2000 | |---|---|---|---|---|---|---|---| | R.P.M. | | | | | | | | | Thermal equt. work… | ||
| Scan28 | Data sheet showing heat flow to cooling water under various throttle, load, and compression ratio conditions. | ||
| View original record | SHEET 3. HEAT FLOW - THROTTLED AND FULL THROTTLE. HEAT FLOW TO COOLING WATER - UNDER THROTTLE AND FULL LOAD CONDITIONS WITH HIGH AND LOW COMPRESSION. | | Low compression - ratio 3.9 | | High… | ||
| Scan29 | Test data tables for heat flow with varying mixture strength and ignition timing on a low compression engine. | ||
| View original record | SHEET 4. MIXTURE AND IGNITION - LOW COMPRESSION. HEAT FLOW WITH VARYING MIXTURE STRENGTH LOW COMPRESSION ENGINE - RATIO 3.9. All readings at 500 r.p.m. | Dyn. lbs. | Pts. hr. | To water B. Th. U's.… | ||
| Scan30 | Data tables comparing engine heat flow and horsepower with clean vs. carbonised engines, and with aluminium vs. cast iron pistons. | ||
| View original record | SHEET 5. CLEAN AND DIRTY ENGINE - CAST IRON AND ALUMINIUM PISTONS. EFFECT OF CARBON DEPOSIT ON HEAT FLOW TO COOLING WATER. COMPRESSION RATIO FOR THESE READINGS 3.9. Carbonised engine. R.P.M. | HP. |… | ||
| Scan31 | Blank page. | ||
| View original record | ", | ||
| Scan32 | The delivery of car 4-Goshawk-11, detailing its specifications including a modified camshaft and balloon tyres. | ||
| View original record | To R. from Hs. c. to CJ. ORIGINAL Hs3/LG11.9.23. 4-Goshawk-11. X1698 The above car will be ready to bring to WW. at the end of this week. If convenient to you we propose bringing this car to WW -… | ||
| Scan33 | Bench test results for a post-war R. Bosch combined dynamo regulator and cut-out unit. | ||
| View original record | To R & E. from EFC. c. CJ. & FN. c. EY. EP. c. DA. X.4562 - POST-WAR R. BOSCH COMBINED DYNAMO REGULATOR AND CUT-OUT. Further bench tests have been made on this unit since its return from W.W. The… | ||
| Scan34 | Dynamo regulation and trickle charge performance under various conditions. | ||
| View original record | Contd. -2- (1) The cold (18°C) open circuit regulation now starts at 14.6 volts at 490 r.p.m. and varies fairly steadily from this up to 14.9 volts as the speed is increased up to 4000 r.p.m. In the… | ||
| Scan35 | Test report on the proportion of battery charge, external load, and dynamo delivery at 1500 r.p.m. | ||
| View original record | EPCL/T11.9.23. -3- Contd. possibly the new trickle rate will be more satisfactory, especially as it is lower when the dynamo temperature is lower. (4) The proportion of battery charge external load… | ||
| Scan36 | Tests of a Westinghouse vibrator regulator used with various dynamos. | ||
| View original record | Contd. -4- EFC1/TAL.9.23. temporarily satisfactory. Tests of the Westinghouse vibrator regulator in conjunction with the various dynamos are now being made. A point which has recently been realised in… | ||
| Scan37 | Secret memo regarding the proactive preparation of bodies for the new E.A.C. engine. | ||
| View original record | To R. from Hs. c. to CJ. Da. E.A.C. SECRET ORIGINAL. Hs2/LG11.9.23. BODIES FOR E.A.C. X9840 We anticipate having an E.A.C. engine running on the bed in about 10 days time. Although we expect it will… | ||
| Scan38 | Design points and necessary alterations for a sample E.A.C. brush holder. | ||
| View original record | To R. from RFC. c. to E. CJ. Ex. Ry/Ds. ORIGINAL EPEL/T13.9.23. X.9670 - E.A.C. BRUSH HOLDER TO LEC.1725. We are sending you the sample E.A.C. brush holder, together with the spring winding tool,… | ||
| Scan39 | The performance and limitations of a Goshawk battery ignition system. | ||
| View original record | R.R. 493 (40 H) (SL 12-7-23). J.H., D. ORIGINAL EXPERIMENTAL REPORT. COPIES TO: A.C.(L.B.L.) WOR. P.Y.E. D.G. E.P. BN. OY. Expl. No. 4357. REF: FCL/T14.9.23. OBJECT OF TEST. (1) To discover the… | ||
| Scan40 | Distributor head sparking, condenser capacity, and spark gap tests. | ||
| View original record | R.R. 493 A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Contd. Expl. No. 4357. REF: EFC1/T14.9.23. With the smaller capacity of condenser, .32 mf., the maximum distributor speed which could… | ||
| Scan41 | Investigation into sparking to earth within the Goshawk battery ignition distributor. | ||
| View original record | EFC. PB.115. Sept. 5th, 1923. X.4357 - INVESTIGATION OF SPARKING TO EARTH IN GOSHAWK BATTERY IGNITION DISTRIBUTOR. It was first ascertained, using two H.T. wires from the coil, one of which was… | ||
| Scan42 | Table of results from a sparking test, comparing outcomes at different gap sizes under correct and incorrect current directions. | ||
| View original record | TABLE OF RESULTS. Size of gap. Direction of current right. Direction of current WRONG. 1.0 mm. Sparking regular on gaps. 2.0 mm. Ditto. 3.0 mm. Ditto. 4.0 mm. Ditto. 5.0 mm. Ditto. 6.0 mm. Ditto. 7.0… | ||
| Scan43 | Differences in distributor sparking based on the direction of current flow. | ||
| View original record | -3- Contd. There are chiefly three differences between the sparking in the distributor with the current flowing the right way and the wrong way. (1) With the current flowing the wrong way there… | ||
| Scan44 | Preventing water boiling in a vehicle's cooling system by running it under pressure. | ||
| View original record | R.R. 403 (40 H) (SL 42 12-7-23). J.H. D. ORIGINAL EXPERIMENTAL REPORT. COPIES TO: (ROU) BJ. WOR. (Sy) (E) (Da) EP. / PN. (OY) (PS) Expl. No. X. 766 X. 3456 REF. Hsl/LG14.9.23. OBJECT OF TEST. To… | ||
| Scan45 | Pump gland system with a proposal for modifying radiator overflow pipes. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 766 REF: Hel/LG14.9.23. leakage. (3) Pump gland must be good - on the two engines we have tested we have had no trouble. We… | ||
| Scan46 | Method of increasing the boiling point of radiator water by subjecting it to pressure. | ||
| View original record | R.R. 483A (40 H) (EL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. ______ REF: ______ METHOD OF INCREASING THE BOILING POINT OF WATER IN THE RADIATOR BY SUBJECTING IT TO PRESSURE. The following… | ||
| Scan47 | Pressurized radiator system to increase the boiling point of the coolant. | ||
| View original record | B.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. REF: Test 1. It was definitely proved that by increasing the pressure on the water in the radiator above atmospheric, the… | ||
| Scan48 | Page detailing boiling points at different pressures and engine temperature/pressure tests at various speeds. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. -2- EXPERIMENTAL REPORT. Expl. No. REF: circulation, as determined by the venturi meter, remaining normal up to the increased boiling point. Afterwards a… | ||
| Scan49 | Road tests of a standard engine's cooling system during hill climbs. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. -3- Exptl. No. REF: EXPERIMENTAL REPORT. ROAD TESTS. Taken on 49-GB - standard engine - 4 to 1 compression ratio - standard fan and radiator. Tests taken on… | ||
| Scan50 | Sparking over in the battery ignition distributor head on a 20 HP chassis. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H. D. EXPERIMENTAL REPORT. COPIES TO: R.CJ. BJ. WOR. By. E. Da. EP. PN. OY. Mr. Brock. Expl. No. 4357. REF. EFC2/T18.9.23. OBJECT OF TEST. To determine if, in any… | ||
| Scan51 | Investigating a 'roar' sound on a Goshawk 11 engine. | ||
| View original record | R.R. 403 (40 H) (SL 42 13-7-23). J.H. D. ORIGINAL EXPERIMENTAL REPORT. COPIES TO: R.CJ. BJ. WOR. By. E. Da. EP. PN. OY. Expl. No. X.4229 X.4580 REF. Hs3/LG20.9.23. OBJECT OF TEST. To investigate the… | ||
| Scan52 | The effects of different valve timings on engine firing and cylinder pressure. | ||
| View original record | -2- R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expt. No. 4229 REF: Hs3/LG20.9.23. engine firing, and that it could be accentuated by advancing the valve timing, or eliminated by… | ||
| Scan53 | Engine roaring, investigating the relationship with valve timing, gas discharge and pressure. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H. D. -3- Expt. No. X.4229 REF: Hs3/LG20.9.23. EXPERIMENTAL REPORT. This conforms admirably with the theory e that with the valve timing advanced there will be the… | ||
| Scan54 | Adjusting valve timing and tappet clearance to control engine roar. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23) J.H., D. EXPERIMENTAL REPORT. Expl. No. X.4229 REF: HS3/LG20.9.23. but would roar with early timing, we should be able, according to the indicator theory, to bring on… | ||
| Scan55 | Varying camshaft timing and its effect on cylinder pressure and inlet valve opening. | ||
| View original record | LIGHT SPRING CARD - G.11. FIRING. G.11. Camshaft timing varied. (a) Two teeth early. (b) Two teeth late. (c) Four teeth late. (crossed out) (d) Standard. The positive pressure bump in the cylinder is… | ||
| Scan56 | Graph of piston displacement against crank angles, with blank fields for recording engine test data. | ||
| View original record | RR.495A (IH) (SL119 17-8-23) MP 2755168 GII Spring Used—Rating 6.2 Diagram Area Engine ______ Cyl. No. AVERAGE Air. Temp. ________ Bar Temp. ________ Cooling Water Temp. _______ R.P.M. _______ Lbs.… | ||
| Scan57 | Analysis of cylinder pressure using a light spring card with a non-firing cylinder at varied RPMs. | ||
| View original record | LIGHT SPRING CARD - NOT FIRING. REVS: VARIED. Cards taken at 1250 and 2400 r.p.m. - Exhaust Manifold on. These demonstrate that the pressure builds up in the cylinder to a greater extent when running… | ||
| Scan58 | Performance graph plotting piston displacement against crank angles at various RPMs. | ||
| View original record | RR 495A (LH) (SL11D 17-8-22) MP 275518B G.IV Spring Used—Rating 6.2 Diagram Area Engine Cyl. No. AVERAGE Air. Temp. Bar Temp. Cooling Water Temp. R.P.M. Lbs. Lift H.P. I.M.E.P. B.M.E.P. Max. Expl. Pr.… | ||
| Scan59 | Analysis of a light spring indicator card to deduce back pressure with the exhaust manifold on and off. | ||
| View original record | G.11. LIGHT SPRING CARD - FIRING. EXHAUST MANIFOLD ON AND OFF. From this, one would deduce that the bump as shewn on the standard indicator card is chiefly back pressure. Unfortunately, we have not… | ||
| Scan60 | Graph showing piston displacement for crank angles, comparing performance with the exhaust manifold on and off at 2000 RPM. | ||
| View original record | [ "BR 495A (1H) (SL112 17-8-23) MP 27581BR", "G1", "Spring Used—Rating 6.2 Diagram Area", "Engine", "Cyl. No. AVERAGE", "Air. Temp.", "Bar Temp.", "Cooling Water Temp.", "R.P.M. 2000", "Lbs. Lift",… | ||
| Scan61 | The effects of setting exhaust tappet at various clearances on cylinder pressure. | ||
| View original record | LIGHT SPRING CARD - G.11. FIRING. EXHAUST TAPPET SET AT VARIOUS CLEARANCES. This demonstrates two points :- (a) The bump can be produced apart from back pressure by making the last portion of the… | ||
| Scan62 | Graph plotting piston displacement against crank angles for different clearances, with a data entry section for engine performance metrics. | ||
| View original record | RR.482A (IH) (BL)ID (17-8-28) MP 2785:5B G.III. Spring Used—Rating Diagram Area Engine Cyl. No. Air. Temp. Bar. Temp. Cooling Water Temp. R.P.M. Lbs. Lift H.P. I.M.E.P. B.M.E.P. Max. Expl. Pr. Av.… | ||
| Scan63 | Analysis of light spring diagrams for a non-firing engine with varied exhaust conditions. | ||
| View original record | G.11. LIGHT SPRING DIAGRAM. NOT FIRING. EXHAUST CONDITIONS VARIED. The light spring diagrams taken not firing are very much clearer than those taken firing. Much the same result was observed when the… | ||
| Scan64 | Graph comparing exhaust manifold performance against piston displacement for crank angles. | ||
| View original record | RR 495A (1H) (SL11D 17-9-23) MP 270910B G.V. Spring Used—Rating Diagram Area Engine Cyl. No. Air. Temp. Bar Temp. Cooling Water Temp. R.P.M. Lbs. Lift H.P. I.M.E.P. B.M.E.P. Max. Expl. Pr. Av. Expl.… | ||
| Scan65 | Clarifying corrections to the Goshawk 11 Frame Deflection chart. | ||
| View original record | To Da. from Hs. ORIGINAL. Hs6/LG20.9.23. GOSHAWK 11. FRAME DEFLECTION. x4260 With reference to the Chart of Frame Deflections with and without tie rods which I left at WW. We have gone over the… | ||
| Scan66 | The conditions existing in a G.11 cylinder under firing conditions. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H., D. ORIGINAL. EXPERIMENTAL REPORT. COPIES TO: R.C. WOR. By. E. Da. OY Expl. No. X.4225 X.4580 REF. He5/LG21.9.23. OBJECT OF TEST. To determine the conditions… | ||
| Scan67 | Engine cylinder pressure, induction stroke, back pressure, and compression diagrams. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 4225 REF: HGB/LGZ1.9.23. considerably less than the Condor. The diagram of the induction stroke again indicates a positive… | ||
| Scan68 | Indicator, Induction, and Compression diagrams for a G.II engine. | ||
| View original record | G.I. INDICATOR DIAGRAM. SPRING USED-RATING. 59.0 DIAGRAM AREA. 14.9 ENGINE 8 GII CYL. No REPRESENTATIVE DIAGRAM. AIR. TEMP. 15°C BAR. TEMP. 750 M.M. COOLING WATER TEMP 85°C. R.P.M. 2000. LBS. LIFT.… | ||
| Scan69 | Querying the process for receiving and dealing with designs for American alterations. | ||
| View original record | To E. from Hs. c. to Da. c. to EY. ORIGINAL Hs2/LGA.9.23. AMERICAN ALTERATIONS. X4605 Are we right in assuming that we shall receive designs from WW. for some of the items referred to in R's memos. in… | ||
| Scan70 | Secret internal memo reporting on the first test run of the E.A.C. engine under light loads. | ||
| View original record | ORIGINAL. To R. from Hs. c. to CJ. Hs6/LG21.9.23. E. A. C. - SECRET. X4606 We have had the above engine running for the first time on the Test Bench today. So far it has only been run under light… | ||
| Scan71 | Torque reaction vibrations in an engine. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. REF: No.8/1077.9.23 To R. from Hs. c. to CJ. c. to E. c. to Ds. c. to HY. TORQUE REACTION VIBRATIONS. Y4538 X634 Torque ENGINE… | ||
| Scan72 | Measuring engine torque and the effects of friction damping. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. REF: Hs5/LG22.9.23. that some was going through the frame. We therefore measured the torque through a spring balance (as in… | ||
| Scan73 | Blueprint of the G II 20 H/P engine unit, detailing fitted components and total weight. | ||
| View original record | 8 G II ENGINE UNIT. EXHAUST MANIFOLD, DYNAMO MAGNETO & STARTER MOTOR FITTED. CARBURETTER NOT FITTED BUT ALLOWED FOR BY CALCULATION AFTERWARDS. TOTAL WEIGHT OF ENGINE UNIT 651 LBS 1. 2. 3. 4. 5. 6.… | ||
| Scan74 | The power output and torque curve for the E.A.C. engine fitted with a 40/50 HP carburetter. | ||
| View original record | ORIGINAL SECRET To R. from Hs. c. to CJ. Hs4/LG24.9.23. E. A. C. X4606 The following is the best HP. curve we have so far obtained from the above engine :- E.A.C. POWER OUTPUT - with 40/50 HP. Carb.… | ||
| Scan75 | Performance of Goshawk dynamos and the upcoming testing of an E.A.C. dynamo. | ||
| View original record | To R & E. from EFC. c. CJ. & PN. c. EY. EP. WOR. RE ELECTRICAL WORK. X4383 Answering your M1/M20.9.23, with regard to Goshawk dynamos and their brush gear, it is our experience that with the very… | ||
| Scan76 | Secret memo discussing the urgent need to fit front-wheel brakes and suggesting acquiring a Hispano car for comparison. | ||
| View original record | To R. from Hs. c. to CJ. c. to Rg. SECRET. E. A. C. ETC. FRONT WHEEL BRAKES. X4428 X1746 X4214 X4609 As it would appear, fitting the front wheel brakes as standard on to our cars - whether 40/50 HP.… | ||
| Scan77 | Complaints of owners losing the petrol tank filler cap and proposing solutions. | ||
| View original record | To R. from Hs, c. to CJ. E. c. to Rg. Da. c. to BY. Hs3/LG27.9.23. ORIGINAL PETROL TANK FILLER CAP. x3889 x4266 We are receiving a number of complaints of Owners losing the cap. On 4-G-11 car which… | ||
| Scan78 | Weakness in the third brush system of 20 HP dynamos causing overheating due to partial jamming of the main brush. | ||
| View original record | To R & E from EFC. ORIGINAL EFC4/T27.9.25. c. CJ. & PN. c. BY. WOR. EP. DA. c. Mr. Brock. X.4383 - RE 20 H.P. DYNAMOS. A weakness of the third brush system of control, (in which protection is not… | ||
| Scan79 | Analysis of dynamo overheating, suggesting issues with brush contact and bedding as a probable cause. | ||
| View original record | Contd. -2- EFC4/T27.9.23. Partial contact at the positive and or control (or field) brushes could only reduce the output and would be very much less serious. It seems probable that cases of… | ||
| Scan80 | Test report on the behaviour of a 20 HP dynamo when excited but unloaded. | ||
| View original record | To R & E. from EFC. c. CJ. & PN. c. DA. BY. EP. c. WOR. OY. DB ORIGINAL EFC5/T28.9.23. X.4383 - BEHAVIOUR OF 20 H.P. DYNAMO EXCITED BUT UNLOADED. A short test has been made on the effect of running of… | ||
| Scan81 | Test results and temperature analysis for a dynamo under various conditions. | ||
| View original record | Contd. -2- EFC5/T28.9.23. Speed. R.P.M. Main volts. Field volts. Field amps. Field Ohms. 725 15.2 10.0 2.8 3.57 960 23.0 15.3 4.1 3.73 1035 26.5 17.5 4.65 3.76 1325 37.0 24.3 6.3 3.86 1540 45.5 30.0… | ||
| Scan82 | The temperature at which a dynamo's carcase corresponds to the melting point of commutator solder. | ||
| View original record | Contd. -3- EFC5/T28.9.23. + With the dynamo mounted normally on the cast iron rig, it is found that a carcase temperature of about 82°C corresponds to a commutator temperature on the point of melting… | ||
| Scan83 | Engine power curve results with an E.A.C. carburetter and a difficulty encountered during tappet adjustment. | ||
| View original record | To R. from Hs. c. to CJ. SECRET E. A. C. Hs2/LG29.9.23. x9771 x9060 x9770 Attached herewith is a power curve showing the best power we have so far obtained from the above engine. This power curve was… | ||
| Scan84 | Instructions for locking the front engine suspension on a 6.EX car using spherical washers. | ||
| View original record | E. from Hs. Hs2/LG29.9.23. ORIGINAL 6.EX CAR ENGINE SUSPENSION. x4604 We are sending to you the necessary parts for locking up the front of 6.EX car engine suspension. We found that in order to be… | ||
| Scan85 | Confirming experiments on engine suspension are nearly complete and a full report will follow. | ||
| View original record | To E. from Hs. c. to CJ. ORIGINAL ENGINE SUSPENSION. We are working continuously on Engine Suspension experiments. We have carried out most of the experiments asked for but we wish to confirm our… | ||
| Scan86 | Flexible mounting for the rear end of the engine on a 40/50 chassis. | ||
| View original record | TO BY. FROM E. ORIGINAL E3/M1.9.23. c. to Cd. HS. 40/50 CHASSIS. FLEXIBLE MOUNTING FOR REAR END OF ENGINE. Y 4604 We send you herewith drawing No. LeC 1756 shewing the above. You will see that the… | ||
| Scan87 | Error on the 20.HP chassis print regarding identical accelerator pedals for different chassis types. | ||
| View original record | TO BY. FROM DA/EV. c. to LHS. HS. RE. CHASSIS PRINT - 20.HP. X4267 [handwritten] It was pointed out when in London that the accelerator pedals on "B" and "D" type chassis shown in the special… | ||
| Scan88 | Issues with lubricators on the 20 HP rear universal joint being knocked off by coachbuilders and potential solutions. | ||
| View original record | TO DA. FROM DA/EV. c. to R.H. c. to H.S. RE. LUBRICATOR ON REAR UNIVERSAL - 20. HP. X4254 Apparently considerable trouble is being experienced at the coachbuilders by these lubricators being knocked… | ||
| Scan89 | Alternative lubrication points and fittings for a mechanical joint, including diagrams. | ||
| View original record | (2) Another place for the lubricator would be on the aluminium shield with suitable holes drilled to allow the oil to enter the joint. Rather than have the present lubricator when it is knocked off,… | ||
| Scan90 | Inspection report detailing required parts and modifications for a 20.HP Beaton All Weather chassis, R. X3730. | ||
| View original record | TO EV. FROM DA/EV. c. to MMS. HS. re. 20.HP. BEATON ALL WEATHER FOR R. X3730 We inspected this chassis and partly completed body last week and noted the following points which require attention by… | ||
| Scan91 | Letter detailing the dispatch of luggage carrier parts to coachbuilders and other involved parties. | ||
| View original record | (2) fitting etc, as well as the necessary nuts and bolts. (5) LUGGAGE CARRIER. In a day or two we shall send you a revised de- sign of luggage carrier. One of these should be made up quickly and… | ||
| Scan92 | Design suggestions for piston pins and requesting they be tested. | ||
| View original record | TO HS. FROM R. ORIGINAL R1/M5.9.23. c. to -GS. HS. RE. PISTON PINS. X4603 X685 With reference to piston pins I think it is undesirable that the piston pin should have a head because of the difficulty… | ||
| Scan93 | Modifications to a Goshawk 11 luggage grid based on experience. | ||
| View original record | TO BY FROM DA. c. to EH. [struck through] c. to WCR. c. to HS. ORIGINAL DA1/126. 9. 23. LUGGAGE GRID - GOSHAWK 11. Y3524 We send herewith N.Sch. 1448. shewing certain modifications to the standard… | ||
| Scan94 | Applying a Bijur starting pinion to early Goshawk engines. | ||
| View original record | TO BY. FROM E. E1/M6. 9. 23. c. to GJ. c. to HS. c. to MP ORIGINAL GOSHAWK 11. RR. BIJUR STARTING PINION. x3587 We send you herewith drawing No.Lec.1759 shewing how a Bijur starting pinion can be… | ||
| Scan95 | Proposal for an extension on the Goshawk 11 engine's valve guide to shield the valve stem from heat. | ||
| View original record | TO BY. FROM E. c. to GJ. HS. MP ORIGINAL. E2/M6.9.23. GOSHAWK 11. EXTENSION ON VALVE GUIDE. X4226 We send you herewith drawing No. LeC.1760. shewing a suggestion regarding obtaining extra conductivity… | ||
| Scan96 | Modifications to the Goshawk 11 dipping headlight arrangement and operating gear. | ||
| View original record | TO BY. FROM DA. c. to cd. wor. HS. ORIGINAL DA1/M8.9.23. GOSHAWK 11. DIPPING HEAD LIGHTS. X4555 We send herewith N.sch. 1454 showing the dipping head light arrangement modified to suit the larger… | ||
| Scan97 | Cancelled memo regarding headlamps and a spring adjustment for a 20.HP All-Weather car. | ||
| View original record | FROM DA/EV. c. to HS. RE. 20.HP. ALL-WEATHER - HEADLAMPS. x4555 x4090 We do not think the revised scheme of dipping head lights will be perfected in time to be fitted to this car. We therefore wish… | ||
| Scan98 | Revised drawing for a 40/50 chassis oil level indicator. | ||
| View original record | TO EY. FROM E. c. to CJ. HS. ORIGINAL E2/M11.9.23. 40/50 CHASSIS - OIL LEVEL INDICATOR. (X3527) We send you herewith drawing No. LeC.1762., shewing the design for the 40/50 oil level indicator revised… | ||
| Scan99 | Drawing Lec.1761 for an improved Bendix drive on the Goshawk 11 engine, comparing it to a Bijur drive. | ||
| View original record | TO BY. FROM E. c. to ~~CL~~ c. to HH. c. to ~~HP~~ c. to EFC. ORIGINAL GOSHAWK 11. IMPROVED BENDIX DRIVE. x 3592 We send you herewith drawing No. Lec.1761. shewing the above. This design should be… | ||
| Scan100 | Improved Bendix drive for the Goshawk 11 engine and its comparison to a Bijur design. | ||
| View original record | TO BY. FROM E. c. to CJ. c. to HS. c. to SR. c. to EPC. ORIGINAL GOSHAWK 11. IMPROVED BENDIX DRIVE. X3592 We send you herewith drawing No. Lec.1761. shewing the above. This design should be tested… | ||
| Scan101 | The Goshawk 11 power unit suspension with arms on the front of the crankcase. | ||
| View original record | TO HY. FROM E. c. to SJ. c. to HS. c. to WP. ORIGINAL E1/M12.9.23. 2 X3535 X4604 GOSHAWK 11. SUSPENSION OF POWER UNIT WITH ARMS ON FRONT END OF CRANKCASE. We send you herewith drawings Nos. LeC. 1763… | ||
| Scan102 | Methods to reduce engine heat in the passenger cabin. | ||
| View original record | CJ. BJ. PN. LHS.) LORD WARGRAVE. ) FROM R. MR.A.CLAREMONT. ) c. to HS. EP. RG. HY. BY. re. HEAT FROM ENGINE. I notice that CJ. mentions the desirability (if necessary) of spending money to reduce the… | ||
| Scan103 | Report discussing engine cooling issues and potential modifications for different car models. | ||
| View original record | (2) This third item is less effective than the two preceding ones and probably it will be found to have a very little effect on the temperature of the air within the scuttle. This will be tested out.… | ||
| Scan104 | Urgent experiments on the suspension of the 40/50 and Goshawk engines to address torque reactions. | ||
| View original record | TO HS. FROM E. c. to CJ. c. to BY. ORIGINAL EL/M14.9.23. RE. METHOD OF SUSPENDING ENGINE. X4604 Would you kindly note we regard the experiments in connection with the suspension of the 40/50 and… | ||
| Scan105 | Requirement of two rear wing stays and fittings for car 5.Goshawk 11 at Bromley. | ||
| View original record | TO BY. FROM DA/EV. c. to HS. RE. 5.GOSHAWK 11. AT BROMLEY. Please note that Messrs Young & Co require two rear wing stays and fittings for this car, and are held up until they receive them. DA/EV.… | ||
| Scan106 | Requesting an investigation into the clearance of floating bushes in connecting rods as suggested by Mr. Royce. | ||
| View original record | TO HS. FROM E. c. to CJ ORIGINAL E2/M14.9.23. X 3429 RE. FLOATING BUSHES IN CONNECTING RODS. In connection with the above Mr. Royce would like you to investigate whether or not the clearance in the… | ||
| Scan107 | Delegating a query about an instrument board light switch to another person. | ||
| View original record | TO HS. FROM DA. ORIGINAL DA2/M14. 9. 23. x4067 Replying to your note re switch, with the device to enable the instrument board light to be kept on, this is Mr. Elliott's (Mr.Stent) job, and I have… | ||
| Scan108 | Modification to the Goshawk 11 universal joint lubricator. | ||
| View original record | T MORIGINAL TO RY. FROM DA. c.c. to EH. c. to HS. see RHC DA3/114.9.23. GOSHAWK 11. UNIVERSAL JOINTS. X4254 We send herewith N. scheme 1456. shewing a modification to the position of the Enots… | ||
| Scan109 | Sending drawings for Goshawk I & Goshawk II engine torque reaction dampers. | ||
| View original record | ORIGINAL TO B.Y. FROM E. c. to HS. E2/M20.9.23. GOSHAWK 1. & GOSHAWK 11. ENGINES - Y4604 TORQUE REACTION DAMPERS. We send you herewith drawings Nos. LeC. 1767, & 1768., dealing with the above. E. | ||
| Scan110 | The formation of an Experimental Committee, its members, remit, and priority projects. | ||
| View original record | ORIGINAL Hs {RG. HY. HS. EPC.} FROM R. R2/M20.9.23. re. EXPERIMENTAL COMMITTEE. X1775 It has been decided by Mr. Royce and myself that it might facilitate and improve the research work if it were… | ||
| Scan111 | Outlining torque reaction vibration experiments for the Goshawk engine. | ||
| View original record | R.R. 235a (100 T) S H. 159 (1-8-20) G. 2800 TO HS) FROM E. c.c. to OJ. BY. ORIGINAL El/M20.9.23. X4604 TORQUE REACTION VIBRATION EXPERIMENTS. The experiments that Mr. Royce would like you to make in… | ||
| Scan112 | Frame deflection measurements on the Goshawk 11 and proposing modifications. | ||
| View original record | R.R. 235a (100 T) (S H. 159 1-S 20) G. 2800 ORIGINAL TO HS. FROM DA. DA2/M20.9.23. RE. FRAME DEFLECTIONS. 44260 With reference to the diagram shewing frame deflections on Goshawk 11. with and without… | ||
| Scan113 | Secret memo from 'R' to 'EFC' regarding progress on electrical work for dynamos and ignition systems. | ||
| View original record | R.R. 235A (100 T) (S.H. 159 11-8-20) G. 2500 TO EFC. FROM R. c. to GJ. BJ. c. to WOR. PN. c. to HS. EP. c. to BY. ORIGINAL SECRET. E. A. C. ELECTRICAL WORK. I am looking anxiously for some progress in… | ||
| Scan114 | Expressing dissatisfaction with the Westinghouse electrical equipment for the U.S.A. Springfield chassis and considering alternatives from American Bosch and Delco. | ||
| View original record | R.R. 326A (100 T) S.H. 159 (1-8-20) G. 2800 TO EFC. FROM R. ORIGINAL R12/M20.9.23. x3966 x4275 x4276 SPRINGFIELD ELECTRICAL EQUIPMENT. I am very dissatisfied with the equipment for the U.S.A.… | ||
| Scan115 | Secret memo from 'R' to 'EFC' regarding re-current improvements for starter motors, including double brushes and a teazer circuit. | ||
| View original record | H.R. 235A (100 T) (S.H. 159 11-8-20) G. 2800 ORIGINAL TO EFC. FROM R. SECRET. R4/M20.9.23. c. to CL. E. A. C. X.9620 X.9630 RE.CURRENT IMPROVEMENTS. The modification for the double brushes for the… | ||
| Scan116 | Car battery requirements, prioritizing reliability and quick charging over larger capacity. | ||
| View original record | R.R. 225A (100 T) (S.H. 159 11-8-20) G. 2809 ORIGINAL 6 TO EFC. FROM R. c-to-OJ. X.664 X.1402 RE. BATTERIES. R10/M20.9.23. Regarding batteries for our cars I am still of the opinion that a larger… | ||
| Scan117 | Three types of experimental chassis (EAC.1, EAC.11, and EAC.111) and their modifications. | ||
| View original record | TO HS. FROM R. SECRET R3/M20.9.23. c. to GJ.BJ.WOR. c. to EH.EF.PN. c. to MPC. E. A. C. x9770 It has now been decided by Mr. Johnson and myself that we have 3 types of experimental chassis in hand,… | ||
| Scan118 | Telegram confirmation from Royce enquiring about the effect of the centre of gyration on vibrations and damping arrangements. | ||
| View original record | R.R. 235A (100 T) (S H. 159 11-8-20) G. 2600 ORIGINAL CONFIRMATION OF TELEGRAM. WESTWITTERING. 21. 9. 23. X4615 X634 ROYCAR. DERBY. HIVES - URGENTLY WAITING TO KNOW IF CENTRE OF GYRATION HAS ANY… | ||
| Scan119 | Insulation and separation between the dash and scuttle on the 20.HP chassis. | ||
| View original record | TO BY. FROM DA/EV. c. to LHS. c. to HS. DA/EV1/M21.9.23. RE. 20.HP. - INSULATION BETWEEN DASH & SCUTTLE. X4613 We are quite in agreement with your remarks in memo. BY5/P19923. re the separation of the… | ||
| Scan120 | Confirmation of a telegram from Royce in West Wittering to Derby. | ||
| View original record | R.R. 235A (100 T) (S.H. 169. 11-8-20) G. 2800 ORIGINAL CONFIRMATION OF TELEGRAM. X4604 WEST WITTERING. 24. 9. 23. ROYCAR. DERBY. HIVES - AVAILABLE WEDNESDAY AFTERNOON CONDUIT STREET. ASSUME YOU HAVE… | ||
| Scan121 | The permanent scheme for a torque reaction damper on the Goshawk 11 engine. | ||
| View original record | TO BY. FROM E. c.c. to-CS. HS. ORIGINAL E1/M26. 9. 23. Y4654 GOSHAWK 11. ENGINE. TORQUE REACTION DAMPER AT FRONT END - PERMANENT SCHEME. We send you herewith LeC. 1774. shewing the above. We have… | ||
| Scan122 | From 'E' to 'HS' requesting distance tubes for an experiment on making the 40/50 model's front feet rigid. | ||
| View original record | F.R. 235A /1C S.H. 159. 11-8-20 G 2800 TO HS. FROM E. EL/M27.9.23. RE. FRONT FEET ON 40/50 MADE RIGID. X4604 Regarding 6.EX. at WW. Mr. Royce says you promised to send some distance tubes for trying… | ||
| Scan123 | Schemes for mounting the power unit to dampen torque reactions. | ||
| View original record | R.R 235A (100 TS H. 159 11-8-20) G. 2800 ORIGINAL TO HS. FROM E. S E C R E T. E2/M27.9.23. c.c. to OJ. E. A. C. RE. DAMPING TORQUE REACTIONS. X9950 It is suggested that the best scheme we have for… | ||
| Scan124 | The dispatch of distance pieces for a rigid front feet experiment on the 6.EX car. | ||
| View original record | TO HS. FROM E. PRIVATE. ORIGINAL E2/M29.9.23. RE. TORQUE REACTION - 40/50. X4604 Regarding the distance pieces for trying the rigid front feet experiment on 6.EX. car which you were going to send to… | ||
| Scan125 | Advantages of an engine oil level gauge over an oil cock, as used on the 20.HP chassis. | ||
| View original record | TO OY. FROM R. c. to BJ. HS. c. to M. DY. ORIGINAL R1/M29.9.23. RE. ENGINE OIL LEVEL GAUGE. X3896 In reply to your letter re the method of inspecting the amount of oil in the engine, we and most high… | ||
| Scan126 | Proposal for a suggested body stiffener for a 20 HP vehicle. | ||
| View original record | TO BY. FROM DA. c.c. to CJ. LHS. HS. RE. SUGGESTED BODY STIFFENER - 20.HP. X3730 We send herewith N.sch. 1461. shewing a sheet metal channel for stiffening the bottom runner of the body two of which… | ||
| Scan127 | Frame deflection and body mounting for the Goshawk 11 chassis, comparing tiebar systems and proposing a new body runner stiffener. | ||
| View original record | TO LHS. FROM DA/EV. c. to GS. HS. BY. ORIGINAL DA/EV1/M29. 9. 23. X3730 X3729 X4260 BODY RE. FRAME DEFLECTION & MOUNTING. GOSHAWK 11. Derby have fitted up a 20.HP. chassis with tiebars similar in… | ||
| Scan128 | Experimental modifications to a car's body and scuttle insulation. | ||
| View original record | (2) The scuttle is entirely insulated from the dash and it will be necessary to separate the aft valance from that portion in front of the dash. We would like to try this experiment on a car… | ||
| Scan129 | Drawing for an improved Goshawk 11 clutch operating gear. | ||
| View original record | TO BY. FROM E. ORIGINAL E1/M30.9.23. c. to G.J. c. to H.S. c. to E.P. IMPROVED GOSHAWK 11. CLUTCH OPERATING GEAR TO SUIT SIDE CHANGE GEARBOX. Y4244 X4247 We send you herewith drawing No. LeC.1754.… | ||