Rolls-Royce Archives
| Identifier | Entry | ||
| Scan001 | Tests conducted on the petrol suction pump for the 'SS' engine. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor.✓ c. to E. DA. c. to BY. Hs/ACL1/LG3.9.28. ORIGINAL! 'SS' ENGINE. Y3579 Y7510 We have carried out some tests with the petrol suction pump on the 'SS' engine and… | ||
| Scan002 | Analysis of a piston pump's operation, detailing the suction stroke, port registration, pressure dynamics, and its effect on the autovac system. | ||
| View original record | contd :- -2- The pump - see LeC. 2470 and 2478 - has a stroke of .800" and we find the suction and outlet ports are separated by .600". When the piston port is in registration with the suction port… | ||
| Scan003 | Report page discussing pump efficiency, suction readings, and lubrication improvements for various components. | ||
| View original record | contd :- -3- effective stroke of the pump. We think the efficiency of the pump would be increased if the ports were arranged so that the suction port registered with the piston port when at the bottom… | ||
| Scan004 | Schematic diagram illustrating the operation of an S.S. vacuum pump at different piston strokes. | ||
| View original record | S.S. VACUUM PUMP PISTON AT BOTTOM OF STROKE AIR ENTERING OUTLET PORT INTO CYL. DUE TO PRESSURE DROP DURING LATTER .200 PISTON TRAVEL SUCTION PORT AT BOTTOM OF STROKE PISTON UNCOVERS TOP PORT - PISTON… | ||
| Scan005 | Performance graph for a vacuum pump on a Super Sports engine, plotting petrol delivery and pump suction against engine RPM. | ||
| View original record | VACUUM PUMP. (SUPER SPORTS ENGINE) ENGINE No SS-3. BORE = 1.125" STROKE = .800" COMP. RATIO = 2.13 PUMP RUNS AT HALF SPEED OF ENGINE. Left Y-Axis: PETROL DELIVERY (PINTS PER HOUR) Right Y-Axis:… | ||
| Scan006 | Blank document page with a red 'Print Room' stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 1 SEP 1928 DERBY. | ||
| Scan007 | Progress report on modifications and outstanding issues with a 20 HP car, model 12-G-4. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to E. DA. c. to BY. Hs3/LG4.9.28. 12-G-4 20 HP. CAR. X5770 X50260 4H663 We have now made this car satisfactory with regard to :- (1) SLIPPER DRIVE. We have got the… | ||
| Scan008 | Retaining a car, reference (12-g-4), to investigate the reason for its harsh riding. | ||
| View original record | contd F- -2- We could send this car (12-g-4) to WW. any time you wish. We would like however to keep it here for a little longer in order to try and find the reason for the harsh riding. Hs. | ||
| Scan009 | Connection of annular air spaces in F.S. Carburetters and upcoming tests on slipstream effects. | ||
| View original record | To E. from Hs. ORIGINAL Hs2/LG4. 9. 28. F. S. CARBURETTERS. El/M28. 7. 28. X3933 In your memo. you say it is proposed not to connect together the annular air spaces behind the chokes etc. Lr. thinks… | ||
| Scan010 | Test report on the Super Sports Engine No. 55-3, detailing running conditions, failures, and subsequent modifications. | ||
| View original record | To R. from Hs./ACL. SECRET. c. to BJ. Wor. c. to E. DA. c. to BY. ORIGINAL HS/ACL1/LG5. 9.28. SUPER SPORTS ENGINE. X7700 X7771 Engine No.55-3. Total running time to date = 12 hrs. Running conditions.… | ||
| Scan011 | Engine testing, detailing issues with vibration, the vacuum pump, and oiling system, and listing optimal valve timings. | ||
| View original record | contd :- -2- Two arrangements have been tried (V.406 and 411), both being equally good. The method adopting the flats is recommended more as this does not necessitate the use of small holes. A… | ||
| Scan012 | Blueprint detailing the oil grooves in a dynamo drive bush for a Super Sports engine. | ||
| View original record | FOR ALL OTHER DIMENSIONS SEE E77346. .312 +.5 .125 +.20 1.130 +.5 DIA. .075 +.20 1.050 CTR +.10 SPIRAL GROOVE (R.H), .040 WIDE x .015 DEEP, ONE COMPLETE TURN. OIL GROOVES IN DYNAMO DRIVE BUSH. (SUPER… | ||
| Scan013 | Blueprint detailing the inverted plan of oil drain grooves in a governor housing for a Super Sports Engine. | ||
| View original record | TWELVE SLOTS EQUALLY SPACED, THUS:- V405 .250 ± .010 2.000 DIA ± .010 INVERTED PLAN (E77684) OIL DRAIN GROOVES IN GOVERNOR HOUSING (SUPER SPORTS ENGINE) [Stamp Text]: ...CE. LIMITED PRINT ROOM, 5 SEP… | ||
| Scan014 | Sketch showing the arrangement of an oil scoop for a super-sports engine. | ||
| View original record | V409 OIL TROUGH (TO PLAIN BEARING). SCOOP RIVETED TO WHEEL-CASE. DYNAMO DRIVE PINION SKETCH SHEWING ARRANGEMENT OF OIL SCOOP. (SUPER - SPORTS ENGINE) ROLLS-ROYCE, LIMITED PRINT ROOM, 5 SEP 1928 DERBY. | ||
| Scan015 | Blueprint for a modified rocker shaft for a super-sports engine. | ||
| View original record | FOR ALL OTHER DIMENSIONS SEE E77885. V411. 16.775 ±15 .475 ±5 5.687 ±5 11.187 ±5 .500 +20 .100 +20 SIX FLATS THUS. .187 +20 16.300 ±5 SECTION RR SECTION BB SECTION CC .812 ±5 .800 ±5 1.200 ±5 1.200 ±5… | ||
| Scan016 | Power curve graph for a Super Sports engine plotting brake horse power, oil pressures and induction pipe depression against RPM. | ||
| View original record | SUPER SPORTS ENGINE POWER CURVE. ENGINE N° 553. COMP. RATIO = 4.5. CLAUDEL HOBSON CARBURETTOR. HOT SPOT (WATER) IN ACTION OPEN EXHAUST. BRAKE HORSE POWER. Induction Pipe Depression. Main Oil Pressure.… | ||
| Scan017 | Suspension tests for the 40/50 HP Phantom to address low-speed riding complaints. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to E. DA. c. to BY. OY. c. to PN. CWB. c. to Hm. ORIGINAL Hs/Rml/LG6.9.28. SUSPENSION - 40/50 HP. X8410 X8520 We have been carrying out a number of tests to… | ||
| Scan018 | The effect of shock absorbers on vehicle ride quality under various test conditions. | ||
| View original record | contd :- -2- giving 1.5" front buffer clearance, cadmium plated and well lubricated. This is the type of springing we are at present offering to customers. The springs had been in service about 6… | ||
| Scan019 | Test report detailing the effects of modifying tyre pressures and front springs on ride comfort. | ||
| View original record | contd :- -3- Briefly, if you hold either end of the car to the axles at this speed and leave the other end free, it appears that the end that is held acts as a pivot and anyone seated on the pivot… | ||
| Scan020 | The performance of front and rear springs, including internal friction and rating tests. | ||
| View original record | contd :- -4- (d) That the weaker front springs make a marked difference to the riding with tyres at standard pressures. (e) That this difference is somewhat less marked with reduced tyre pressures and… | ||
| Scan021 | Vehicle suspension tests focusing on spring ratings, buffer clearance, and ride comfort. | ||
| View original record | contd :- -5- produced by reducing the front spring rating 19%. We could not measure any improvement when running with soft tyres and no front shock absorbers. We therefore consider that it is doubtful… | ||
| Scan022 | Summary of conclusions and proposed experiments to improve Phantom complaints related to suspension and high-speed wobbles. | ||
| View original record | contd :- -6- Summarising our conclusions: We can improve the Phantom complaints by attention to spring friction consistency and tyre pressures at the rear. We cannot do very much here, however. The… | ||
| Scan023 | Phantom springing complaints, focusing on leaf friction and its effect on ride comfort. | ||
| View original record | re PHANTOM SPRINGING COMPLAINTS. We have realized for a long time past that one of the most important factors affecting comfort in riding is leaf friction. We know from every-day experience that after… | ||
| Scan024 | Detrimental effects of leaf spring friction on comfort and potential solutions such as plating. | ||
| View original record | -2- Hm/MRC9/MW27.8.28. We find that leaf spring friction can have at least as detrimental an effect on the comfort as that of the rear springs, being several hundred lbs stronger than is necessary to… | ||
| Scan025 | Review of suspension complaints for the 40/50 model, focusing on 'hard riding' and adjustments to buffer clearance. | ||
| View original record | Hm/NRC8/MW7.9.28. re SUSPENSION 40/50. We have recently reviewed a number of the springing complaints we have dealt with during the last 6 months, and we find that about 85% of these refer to… | ||
| Scan026 | Customer complaints of seasickness and hard riding, and the effects of spring stiffness and damping. | ||
| View original record | -2- Hm/NRC8/MW7.9.28. There are also a few cases of complaints of seasickness where we have fitted stronger springs only after having done everything possible to eliminate fumes from the body, but the… | ||
| Scan027 | Graph showing the results of two rating tests on a non-cadmium plated rear road spring. | ||
| View original record | REAR ROAD SPRING RATING TESTS - F78536 NOT CADMIUM PLATED ROYCE, LIMITED TEST ROOM 8 SEP 1928 DERBY. TEST 1 TEST 2 RATING LBS / 1" DEFLN APPLIED LOAD POUNDS TOTAL DEFLECTION 200 150 200 400 600 800… | ||
| Scan028 | Bar chart comparing test results for different methods of improving the Phantom's low-speed ride quality. | ||
| View original record | TEST TO DETERMINE THE BEST METHOD OF IMPROVING THE PHANTOM LOW SPEED RIDING. ALL TESTS AVERAGE MAIN ROAD 23 M.P.H. 8 E.X. CAR. LIMOUSINE FRONT AXLE WT. 25 CWTS. REAR AXLE WT. 28 CWTS. 1/ EFFECT OF… | ||
| Scan029 | Cover page with a Print Room reception stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 10 SEP 1928 DERBY. | ||
| Scan030 | Suspension tests for the 40/50 HP Phantom to improve low-speed riding comfort. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to E. DA. c. to BY. OY. c. to PN. CWB. c. to Hm. x8410 Hs/Rml/LG6.9.28. SUSPENSION - 40/50 HP. x8520 We have been carrying out a number of tests to determine :- (1)… | ||
| Scan031 | Results of tests on the effect of shock absorbers on vehicle ride quality. | ||
| View original record | contd :- -2- giving 1.5" front buffer clearance, cadmium plated and well lubricated. This is the type of springing we are at present offering to customers. The springs had been in service about 6… | ||
| Scan032 | Tests on tyre pressures and front springs to improve ride comfort and handling. | ||
| View original record | contd :- -3- Briefly, if you hold either end of the car to the axles at this speed and leave the other end free, it appears that the end that is held acts as a pivot and anyone seated on the pivot… | ||
| Scan033 | Tests on internal spring friction and rear spring ratings. | ||
| View original record | contd :- -4- (d) That the weaker front springs make a marked difference to the riding with tyres at standard pressures. (e) That this difference is somewhat less marked with reduced tyre pressures and… | ||
| Scan034 | Report page detailing vehicle suspension testing, focusing on spring ratings, buffer clearance, and ride quality analysis. | ||
| View original record | contd :- -5- by reducing the front spring rating 19%. We could not measure any improvement when running with soft tyres and no front shock absorbers. We therefore consider that it is doubtful whether… | ||
| Scan035 | Improving Phantom complaints by adjusting suspension, steering, and tyre characteristics. | ||
| View original record | contd :- -6- We can improve the Phantom complaints by attention to spring friction consistency and tyre pressures at the rear. We cannot do very much here, however. The greatest improvement we can… | ||
| Scan036 | Complaints about Phantom model springing, focusing on the effects of leaf spring friction on ride comfort. | ||
| View original record | Hm/NRC9/MW27.8.28. RE. PHANTOM SPRINGING COMPLAINTS. We have realised for a long time past that one of the most important factors affecting comfort in riding is leaf friction. We know from every-day… | ||
| Scan037 | Reducing leaf spring friction through polishing and plating to prevent rust and wear. | ||
| View original record | contd :- -2- springs, being several hundred lbs. stronger than is necessary to prevent buffer bumping. All this points to the importance of not only reducing leaf friction (and consequent leaf wear)… | ||
| Scan038 | Review of springing complaints on the 40/50 Hp model and methods for improving ride comfort. | ||
| View original record | Hm/NRC8/MW7.9.28. RE. SUSPENSION 40/50 Hp. We have recently reviewed a number of the springing complaints we have dealt with during the last 6 months and we find that about 85% of these refer to… | ||
| Scan039 | Customer complaints of sea-sickness and hard riding through spring and damping adjustments. | ||
| View original record | contd :- -2- There are also a few cases of complaints of sea-sickness where we have fitted stronger springs only after having done every thing possible to eliminate fumes from the body, but the great… | ||
| Scan040 | Bar chart comparing tests to determine the best method of improving the Phantom's low-speed ride quality. | ||
| View original record | TEST TO DETERMINE THE BEST METHOD OF IMPROVING THE PHANTOM LOW SPEED RIDING. ALL TESTS AVERAGE MAIN ROAD 23 M.P.H. 8 E.X. CAR. LIMOUSINE FRONT AXLE WT. 25 CWTS. REAR AXLE WT. 28 CWTS. COLUMN 1: EFFECT… | ||
| Scan041 | Blank, folded document with a purple date stamp from Derby. | ||
| View original record | .. LIMITED ..OOM, 17 SEP 1928 DERBY. | ||
| Scan042 | Tests carried out on road springs to determine internal friction under various conditions. | ||
| View original record | To R. from HS/Rm. c.c. to BJ. Wor. c.c. to E. DA. c.c. to BY. X 8410 HS/Rml/LGS. 9. 28. ROAD SPRINGS. With reference to R2/M20.7.28 and R1/M23.7.28, we have carried out tests to determine :- (1)… | ||
| Scan043 | Continued document discussing the performance and rating of springs after a period of service. | ||
| View original record | contd :- -2- place after the springs have been in service six months or so. This must be due partially to the digging in which takes place at the end of the leaves and is noticeable after a short… | ||
| Scan044 | Graph showing deflection and hysteresis data for a standard rear road spring. | ||
| View original record | A STANDARD REAR ROAD SPRING 40/50 F78536 CLEAN AND LUBRICATED BUT NOT CADMIUM PLATED LOADED AT TIP. KNIFE EDGE AT CENTRE NO SPRING CLIPS OR PAD. HYSTERISIS TIP DEFLN. INS. 12 10 8 6 1000 1200 1400… | ||
| Scan045 | Blank page with a purple ink stamp from the Print Room, Derby. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 8 SEP 1927 DERBY. | ||
| Scan046 | Three graphs showing results from rear road spring tests after cadmium plating, without clip and spring pads. | ||
| View original record | REAR ROAD SPRING TESTS - F.78536. B AFTER CADMIUM PLATING. WITHOUT CLIP AND SPRING PADS. Graph 1 (Top): TEST No 3 LEFT Y-AXIS (DEFLECTION - INS - SPRING TIP): 8, 10, 12 X-AXIS (APPLIED LOAD - LB-):… | ||
| Scan047 | Series of three graphs showing results of rear road spring tests with cadmium plated pads and clips fitted. | ||
| View original record | C/ REAR ROAD SPRING TESTS - F.78536 31-8-28 CADMIUM PLATED SPRING PAD & CLIPS FITTED. Chassis No Vertical Y-Axis Label (applies to all graphs): SPRING - TIP DEFLECTION - INS - Top Graph: HYSTERISIS… | ||
| Scan048 | Graph showing results from three rear road spring tests measuring deflection against applied load. | ||
| View original record | REAR ROAD SPRING TESTS - 8 Ex N.S. - 1950 LBS SPRING PAD & CLIPS FITTED. SPRING RUN 5,000 MILES IN 6 MONTHS. Graph 1: TEST No3. DIFFERENCE UP & DOWN Right Axis Labels: 260, 234 Graph 2: TEST No2 Right… | ||
| Scan049 | Blueprint graph showing the results of two rear road spring rating tests. | ||
| View original record | REAR ROAD SPRING RATING TESTS - F78536 NOT CADMIUM PLATED ROYCE, LIMITED TEST ROOM, 8 SEP 1928 D'BY. TEST 1 TEST 2 RATING LBS / 1" DEFLN 200 150 APPLIED LOAD POUNDS 0 200 400 600 800 1000 1200 1400… | ||
| Scan050 | Series of tests to determine the internal friction of road springs. | ||
| View original record | To R. from Hs/Rm c. to BJ. WoR. c. to E. DA. c. to BY. Hs/Rml/LGS.9.28. ROAD SPRINGS. X8410 With reference to R2/M20.7.28 and RL/M23.7.28, we have carried out tests to determine :- (1) Whether the… | ||
| Scan051 | Continued discussion on the behavior and rating of car springs after a period of service. | ||
| View original record | contd :- -2- place after the springs have been in service six months or so. This must be due partially to the digging in which takes place at the end of the leaves and is noticeable after a short… | ||
| Scan052 | Performance graphs for a standard rear road spring showing tip deflection and hysteresis. | ||
| View original record | A STANDARD REAR ROAD SPRING 40/50 F78536 CLEAN AND LUBRICATED BUT NOT CADMIUM PLATED LOADED AT TIP. KNIFE EDGE AT CENTRE NO SPRING CLIPS OR PAD. TIP DEFLN. INS. 12 10 8 6 1000 1200 1400 1600 1800… | ||
| Scan053 | Three graphs showing rear road spring tests after cadmium plating, without clip and spring pads. | ||
| View original record | REAR ROAD SPRING TESTS - F 78536 - B AFTER CADMIUM PLATING WITHOUT CLIP AND SPRING PADS. SPRING TIP DEFLECTION - INS APPLIED LOAD - LB APPLIED LOAD - LB - SPRING TIP TEST Nº 3 HYSTERISIS 28 22 18 14… | ||
| Scan054 | Blank page with a Print Room stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 8 SEP 1928 DERBY. | ||
| Scan055 | Series of three graphs showing the results of rear road spring tests with cadmium plated spring pads and clips fitted. | ||
| View original record | REAR ROAD SPRING TESTS - F. 78536 CADMIUM PLATED SPRING PAD & CLIPS FITTED. 31-8-28. C/ Illegible handwriting on left margin. Graph 1 (Top): HYSTERISIS TEST Nº 3 DEFLECTION - INS: 8, 10, 12 APPLIED… | ||
| Scan056 | Chart with three graphs showing the results of rear road spring tests after 5,000 miles of use. | ||
| View original record | D/ 31-8-28 REAR ROAD SPRING TESTS - 8 EX N.S. - 1950 LBS SPRING PAD & CLIPS FITTED. SPRING RUN 5,000 MILES IN 6 MONTHS. Graph 1 (Top): TEST Nº3. DIFFERENCE UP & DOWN Right Axis: 280, 260, 234 Left… | ||
| Scan057 | Modifications to the petrol vacuum pump and camshaft for the 'SS' engine. | ||
| View original record | To R. from Hs/ACL. c.c. to BJ. Wo r. c.c. to E. DA. e. to BY. ORIGINAL Hs/ACL1/LG8.9.28. RR. 'SS' ENGINE. PETROL VACUUM PUMP AND TAPPET ROCKER SHAFT LUBRICATION. X7510 We have modified the vacuum pump… | ||
| Scan058 | Duration timing, camshaft production, and oil flow/consumption tests on the Phantom. | ||
| View original record | contd :- -2- long duration timing wetested on the Phantom and propose testing this while the correct camshaft is being produced. At the moment we have some bearing oil flow and oil consumption tests… | ||
| Scan059 | Blueprint detailing modifications to a vacuum pump for a super sports engine. | ||
| View original record | V413. ALUMINIUM WASHER .187 THICK UNDER CYLINDER CAP TO KEEP COMPRESSION RATIO APPROX. SAME. BRASS DISC .200 THICK SWEATED TO PISTON TOP TO PREVENT PRESSURE PORT BEING UNCOVERED WHEN PISTON IS AT… | ||
| Scan060 | Blank page with a reception stamp from the Derby office. | ||
| View original record | ...IMITED ... ROOM, 7 SEP 1928 DERBY. | ||
| Scan061 | Graph showing the delivery curve of a vacuum pump for a Super Sports engine after modification. | ||
| View original record | V414 VACUUM PUMP (SUPER SPORTS ENGINE). DELIVERY CURVE OF PUMP AFTER MODIFICATION TO V413. DELIVERY (PINTS PER HOUR). R.P.M. OF ENGINE. FUEL DELIVERY BY PUMP THRO' STANDARD AUTO-VAC. FUEL DELIVERY… | ||
| Scan062 | Blank page stamped by the Print Room. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 7 SEP 1939 DERBY. | ||
| Scan063 | Test report on a 14.7 Cottin Desgouttes demonstration car, detailing its specifications and performance. | ||
| View original record | To R: from Hs/Rm. c. to BJ. WOr. c. to E. DA. c. to BY. PN. c. to CWB. ORIGINAL Hs/Rm4/LG8.9.28. Y4332 14.7 COTTIN DESGOUTTES We tried one of these cars in and outside London. It was a demonstration… | ||
| Scan064 | Technical analysis and comparison of car suspension systems, including those of Cottin, Lancia, and Ansaldo. | ||
| View original record | contd :- -2- (1) The very flexible undamped front end. The front of the car can easily be oscillated through four or five inches by taking hold of the bumpers. There is no damping other than interleaf… | ||
| Scan065 | Critical assessment of a Cottin car's performance, body, and second-hand value after 10,000 miles. | ||
| View original record | contd :- -3- likely to promote wobbles. Incidentally the brakes, clutch, steering etc. of the Cottin are so inferior that there is little pleasure to be had from driving this car and its second hand… | ||
| Scan066 | Short memo confirming the return of a car to West Wittering. | ||
| View original record | R. from Hs. ORIGINAL Hs3/LG11.9.28. 12-G-4. X5770 We shall be returning this car to West Wittering at the end of this week. Hs. | ||
| Scan067 | Modifications and performance evaluation of a car. | ||
| View original record | To R. from Hs. c. to BJ: Wor. c. to E. DA. c. to BY. ORIGINAL Hs2/LG13.9.28. 12-G-4. X5770 The following work has been done on this car since it returned to Derby :- (1) Frame ties have been removed.… | ||
| Scan068 | Oiling system tests and weight specifications for the 'SS' engine unit. | ||
| View original record | To R. from Hs. c. to BJ. WoR. c. to E. DA. c. to BY. 'SS' ENGINE UNIT. X.7770 X.7190 X.7840 Tests on the oiling system have been carried out to ascertain the flow through the bearings etc. The oil… | ||
| Scan069 | Graph of oil flows versus RPM for a Super-Sports engine, showing delivery from the pump and flow to various components. | ||
| View original record | V415. OIL FLOWS. (SUPER-SPORTS ENGINE). ENGINE No SS-3. OIL PUMP TO E77663. OIL RELIEF VALVE TO E77670 H.P. SPRING E75748 INTER & L.P. SPRING E76927 OIL TEMPERATURE THROUGHOUT TESTS = 60°C Y-Axis: OIL… | ||
| Scan070 | Blank document page with a purple company date stamp. | ||
| View original record | LIMITED ROOM, 13 SEP 1928 DERBY. | ||
| Scan071 | Graph of oil pressures versus engine RPM for the Super Sports Engine. | ||
| View original record | V416. OIL PRESSURES (SUPER SPORTS ENGINE). ENGINE N° SS-3. OIL PUMP TO E.77663. OIL RELIEF VALVE TO E.77670. H.P. SPRING E75748. INTER & L.P. SPRING E76927. OIL TEMPERATURE = 60°C. OIL PRESSURE (LBS.… | ||
| Scan072 | Fusing currents for main and distributing fuses and the required current tolerance for ammeters. | ||
| View original record | To R. from EFC. C. E. RJ. BY. EFC3/T19.9.28. X.255 Referring to your R./M.8.9.28 and in particular the fusing current of main and distributing fuses, the fusing current of 15 amperes for 30 S.W.G.… | ||
| Scan073 | Test report on 'SS' Engine No. SS-3, detailing running conditions, induction distribution, and optimal valve timings. | ||
| View original record | To R. From HS/ACL c. to BJ. Wor. c. to E. DA. c. to BY. ORIGINAL Hs/ACL1/LG20.9.28. 'SS' ENGINE. X7090 X7070 X1452 X7771 Engine No.SS-3. Running Conditions: Claudel Hobson Carburetter (Eagle IX) Hot… | ||
| Scan074 | Report comparing power curves for 110° and 116° camshafts, with notes on vacuum pump lubrication and tappet adjustments. | ||
| View original record | contd :- -2- speeds than that obtained with the 110° camshaft, but it falls short at the lower speeds. See V.423. for full comparison. It should be noted that the power curve of the 110° camshaft was… | ||
| Scan075 | Power curve graph for a Super Sports Engine comparing different camshafts and nozzle configurations. | ||
| View original record | V423 POWER CURVE WITH 116° CAMSHAFT. SUPER SPORTS ENGINE N° SS-3. COMP. RATIO = 4.5 CLAUDEL HOBSON CARBURETTOR HOT SPOT IN ACTION (WATER AT 75°C) OPEN EXHAUST. 116° CAMSHAFT TO E77322. (N.B. NOZZLE… | ||
| Scan076 | Heavily faded document with a purple ink Print Room stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 20 SEP 1928 DC | ||
| Scan077 | Standardisation and testing of a Phantom Dynamo 28 Slot Armature. | ||
| View original record | To R. from EFC. c. BJ. PN. c. BY. E. c. Do. Wor. 2 PHANTOM DYNAMO 28 SLOT ARMATURE. A standardisation sheet dated 20.7.28 for this item was issued, but awaits BJ's signature. It was stated that it was… | ||
| Scan078 | 10,000-mile test of a 28-slot armature, detailing brush wear. | ||
| View original record | RR 238 (150 BKS.) (DB 431-8.12 24) MP 306975 X.8672 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.F.C. Order No. PD 30. Customer's No. X 8672 10,000 Miles Test of 28 Slot Armature. The 10,000 miles test of the… | ||
| Scan079 | Inspection report on the condition of a commutator and its brush surfaces following a test. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8 12 24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. 19 To Order No. PD 30. (2) Customer's No. The surface of the commutator was in good condition, the segments being evenly… | ||
| Scan080 | Safety issues with non-standard front wheel brakes and the unauthorized fitting of 4-wheel brakes by the repair department. | ||
| View original record | BJ. from R. c. to Hs. BY. c. to DA. Hm. R5/M21.9.28. X.1559 X.4456 X.9940 FRONT WHEEL BRAKES. OTHER THAN OUR STANDARD. Some firms are fitting 'Silver Ghost' with the above. We should be careful to… | ||
| Scan081 | Proposed arrangements for electrical wiring, ignition, and charging switches. | ||
| View original record | To R. From EFC. c. RU. E. c. Ev. Nor. EAC.10 ELECTRICAL WIRING. X7740 x8730 I have carefully read your R2/M19.8.28. We can see the advantages of the proposed arrangement but we wonder if you have… | ||
| Scan082 | Functionality and justification of charging switch contacts and ignition systems. | ||
| View original record | Contd. -2- Alternatively it might be considered desirable to add charging switch contacts to the first or B position so that charge would only be definitely off in the off position of that (ignition)… | ||
| Scan083 | Outlining minor criticisms and suggestions for an electrical installation diagram. | ||
| View original record | To E. from EFC. c. BJ. BY. [Stamp] ORIGINAL EFC2/T25.9.28. [Handwritten] X-7780 EAC.10. ELECTRICAL INSTALLATION. [Handwritten] X7560 Lec.2595. EL/M22.9.28. There are one or two rather minor criticisms… | ||
| Scan084 | Continued note on the conventions for representing current direction on wiring diagrams. | ||
| View original record | -2- Contd. preferable to leave out arrow heads on the main battery charge and discharge wire from battery, via main fuse and ammeter, to distribution board so that the only arrow heads on the diagram… | ||
| Scan085 | Visit to Dunlop Rubber Co. discussing issues with standard tyres and the introduction of new 'Fort' and 'Super' models. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to RG. E. c. to DA. BY. c. to SG. ORIGINAL Hs/Rm3/LG25.9.28. X4050 X.8005 X5820 X.7446 X7820 DUNLOP RUBBER CO. We visited the Dunlop Rubber Co. on the 24th. inst.… | ||
| Scan086 | Technical note detailing Dunlop tyre figures, and observations on rubber engine feet and rubber cylinder joints. | ||
| View original record | contd :- -2- immunity from shimmy than the standard tyre on the 40/50. if so, they might help us in getting a good front end ride. It will be recollected that the 6" tyre was impossible on the… | ||
| Scan087 | Blueprint showing the inflated and deflected shapes of 32x6.00 Dunlop range tyres at standard load and pressure. | ||
| View original record | 32x6.00 DUNLOP RANGE INFLATED & DEFLECTED SHAPES AT STANDARD LOAD & PRESSURE. Top Left Tyre: 5.95" INFLATED WIDTH 32.6" INFLATED DIA EFFECTIVE RADIUS 15.18" LOAD 13 CWT. PRESSURE 42 LBS. 32 x 6.00… | ||
| Scan088 | Observation of the field break spark on charging switch contacts when the dynamo charge is switched off. | ||
| View original record | To R. from EFC. EFC3/T25.9.28. CHARGING SWITCH. X8730 Answering your RL/M22.9.28, we have made a visual observation of the character of the field break spark when the dynamo charge is switched off on… | ||
| Scan089 | Wiring connections for low-voltage systems to protect against short circuits. | ||
| View original record | To R. from EFC. c. E. BJ. c. EX. EFC./T25.9.28. ORIGINAL WIRING CONNECTIONS. On a low voltage system with earth return in which there is no danger of shock, there would appear to be some amount of… | ||
| Scan090 | Test report detailing the compression pressures of an 'SS' engine (No. SS-3) across a range of speeds. | ||
| View original record | To R. from Hs/ACL. c. to BJ. WoT. c. to E. DA. c. to SY. S E C R E T. Hs/ACL1/LG28.9.28. ORIGINAL 'SS' ENGINE. X777 (struck through) X7770 / X790 Engine No.SS-3. Total running time to date = 38 1/4… | ||
| Scan091 | Engine noise investigations, including piston knock, rocker mechanism, valve mechanism, and timing gear issues. | ||
| View original record | CONTD :- -2- small elbow fitted on to the induction pipe. This change has been made in order that the mechanical noise of the engine could be studied more carefully: The Claudel carburetter mark… | ||
| Scan092 | Graph of compression pressures versus RPM for a Super Sports Engine. | ||
| View original record | V431. COMPRESSION PRESSURES (SUPER SPORTS ENGINE) 25-9-28 ENGINE No SS-3. (COMPRESSION RATIO - 4.5) CLAUDEL-HOBSON CARBURETTOR. HOT-SPOT IN ACTION (WATER @ 75°C). 116° CAMSHAFT. FULL BED EXHAUST… | ||
| Scan093 | Blank page with a Print Room, Derby stamp. | ||
| View original record | ROYCE, LIMITED PRINT ROOM, 28 SEP 1928 DERBY. | ||
| Scan094 | Graph showing the Mechanical Efficiency and Friction Horsepower of the Super Sports Engine No SS-3 against RPM. | ||
| View original record | MECHANICAL EFFICIENCY (SUPER SPORTS ENGINE). ENGINE No SS-3. PERCENTAGE MECHANICAL EFFICIENCY. 100%. 90%. 80%. 70%. Mech. Efficy. Friction H.P. R.P.M. OF ENGINE. 1000. 1500. 2000. 2500. HORSE POWER.… | ||
| Scan095 | Car electrical equipment, specifically fuses, earthing faults, and potential for damage. | ||
| View original record | To R. from EFC. c. RJ. EFC3/T29.9.28. CAR ELECTRICAL EQUIPMENT. X8780 Reference your RL/M21.9.28, we have not made a succession of earths on the electrical system deliberately and systematically to… | ||
| Scan096 | Dynamo high voltage operation, fuse capacity, and potential overheating issues in fuse holders. | ||
| View original record | -2- Contd. For instance, it is possible for the dynamo to be run continually at a moderately high voltage (about double normal) without the field fuse going, but if the dynamo is run to some higher… | ||
| Scan097 | Electrical current testing, discussing fusing and oxidising currents in a higher output machine. | ||
| View original record | -3- Contd. at each heating must get progressively weaker until ultimately it goes. The normal fusing current is, as mentioned recently, about 28 amperes, the oxidising current will be perhaps 17 or 18… | ||
| Scan098 | Road spring friction tests, comparing new vs serviced springs and the effects of polishing, greasing, and cadmium plating. | ||
| View original record | To R. from Hs/Rn. c. to BJ. Wor. c. to E. DA. c. to EY. OY. Hs/Rn2/LG28.9.28. ORIGINAL ROAD SPRINGS. Y8410 X4420 X3854 In continuance of our report Hs/Rn1/LG8.9.28, we have been carrying out further… | ||
| Scan099 | Comparing Firths and Woodhead springs regarding internal friction, digging-in, and other design factors. | ||
| View original record | contd :- -2- springs in service so that we shall shortly get a test as to how their internal friction changes compared with standard. Any feature in spring design that would prevent digging-in would… | ||
| Scan100 | On spring friction, detailing issues with seizing and poor bedding in rear leaf springs, and proposing solutions to improve ride comfort. | ||
| View original record | Hs. BY. Wor. EP. C O P Y. SPRING FRICTION. We find that many rear springs, especially of Firths manufacture, are badly and deeply seized at the ends of the plates; particularly is this noticeable on… | ||
| Scan101 | Series of three graphs showing deflection vs. applied load tests for a dry rear road spring. | ||
| View original record | E REAR ROAD SPRING 8 EX. N.S. - 1950 LB CHASSIS TYPE FULCRUM DRY RUN 5000 MILES IN 6 MONTHS. DEFLECTION - INS HYSTERISIS LBS APPLIED LOAD - LB TEST N. 3 HYSTERISIS VALUES: 260, 252, 244 TEST N. 2… | ||
| Scan102 | Blank page with a 'T Room' date stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED T ROOM, 29 SEP 1928 | ||
| Scan103 | Graphs showing load-deflection and hysteresis results for three tests on a lubricated rear road spring. | ||
| View original record | F. REAR ROAD SPRING. 8 EX. N.S. - 1950 LB- CHASSIS TYPE FULCRUM LUBRICATED RUN 5000 MILES IN 6 MONTHS. Left Y-Axis: DEFLECTION - INS- Values: 12.0, 10.0, 8.0 X-Axis: APPLIED LOAD -LB- Values: 1200,… | ||
| Scan104 | Graphs showing results of lubricated standard front road spring tests, plotting deflection against applied load. | ||
| View original record | G STANDARD Front Road Spring - F. 71975 - 1100 LB LUBRICATED DEFLECTION - INS - APPLIED LOAD - LB - HYSTERISIS LBS. TEST Nº 3 TEST Nº 2 TEST Nº 1 Graph Y-axis (Deflection): 3, 4, 5 Graph X-axis… | ||
| Scan105 | Series of graphs showing road spring test results for a standard front spring after 3.5 years of service. | ||
| View original record | H ROAD SPRING TESTS STANDARD FRONT- F.71975 - 1150 LB- OFF 78 N.K. AFTER 3 1/2 YEARS SERVICE DRY DEFLECTION - INS. APPLIED LOAD - LB. HYSTERESIS LBS. Graph 1: Left Y-Axis: 3.0, 4.0, 5.0 X-Axis: 1200,… | ||
| Scan106 | Graph showing the results of three road spring tests, plotting deflection against applied load. | ||
| View original record | J. 1100 LB- 18-8-28 ROAD SPRING TESTS STANDARD FRONT - F.71975- OFF 78 N.K. AFTER 3½ YEARS SERVICE CLEANED AND LUBRICATED DEFLECTION - INS APPLIED LOAD - LB- HYSTERISIS LBS. TEST Nº3 70 60 50 40 TEST… | ||
| Scan107 | Graph showing deflection, applied load, and hysteresis for three tests on a lubricated, cadmium-plated front road spring. | ||
| View original record | K. FRONT ROAD SPRING - STANDARD - F. 71975 - 1100 LB- CADIUM PLATED - LUBRICATED. DEFLECTION - INS- HYSTERESIS LBS. APPLIED LOAD - LB. TEST No 3 TEST No 2 TEST No 1 Y-Axis (Deflection): 5.5, 4.5, 3.5… | ||
| Scan108 | Graphs showing results of three tests on a dry, cadmium-plated front spring after a 4000-mile road test. | ||
| View original record | L FRONT SPRING TESTS - 12 EX. - CADMIUM PLATED F.78164 - 1050 LB - AFTER ROAD TEST - 4000 MILES -DRY- THIS SPRING WAS PURPOSELY NOT LUBRICATED DURING ONE TEST Graph 3: TEST N°3 DEFLECTION - INS: 5, 4,… | ||
| Scan109 | Stamped document cover or separator page, numbered '1'. | ||
| View original record | 1 RD. [illegible] ROYCE, LIMITED [illegible] ROOM, 29 SEP 1928 DERBY. | ||
| Scan110 | Tests comparing the internal friction of front and rear road springs under various conditions. | ||
| View original record | Hs/Rn/LG29.9.28. FRONT ROAD SPRING FRICTION. We have carried out some tests to determine the internal friction of the 40/50 front road springs. The outstanding points are comparing the front and rear… | ||
| Scan111 | Continued note on the difficulty of road-spring tests due to variations in individual springs. | ||
| View original record | contd :- -2- Road spring tests of this nature are difficult because individual springs vary so. We have done a great number of tests, however, and think those we have selected represent average… | ||
| Scan112 | Comparison of Woodheads and Firths 1700 lbs rear road springs, detailing load, camber, and bedding characteristics. | ||
| View original record | COMPARISON OF WOODHEADS AND FIRTHS ROAD SPRINGS (REAR) 1700 LBS WOODHEADS 1700 THESE DIMS. SHEW AMOUNT OF 'NIP' NOTE VERY HEAVY BEDDING OCCURS ON EACH LEAF AT A PLACE COINCIDING WITH THE TIPS OF THE… | ||
| Scan113 | Reverse side of a document page with an archival stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 29 SEP 1928 DERBY | ||
| Scan114 | Drawing comparing the typical bedding and tip sections of a 'Firths Spring' and a 'Woodhead' spring. | ||
| View original record | PART SECTION AA .300 1.200 .125 TYPICAL BEDDING FIRTHS SPRING A PART SECTION AA 2.5 .300 .156 TYPICAL BEDDING WOODHEAD. ALL LEAVES SAME TIP SECTION | ||
| Scan115 | Blank document with a purple 'Print Room' date stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 29 SEP 1928 .S.Y. | ||
| Scan116 | Creation of an ignition timing diagram for the Phantom engine, detailing magneto and battery advance curves. | ||
| View original record | To R. from EFC. c. RJ. E. EY. EFC/T2/12.10.28. PHANTOM IGNITION TIMING. X8680 X928 We have drawn out for convenience of reference an ignition timing diagram, based upon your RL/ML9.9.28, of which the… | ||
| Scan117 | Page 2 of a memo discussing the range of machines and a suggested alteration. | ||
| View original record | EFCL/T2.10.28. -2- Contd. retarded position. Also the range of machines as received is usually so near 60° (within a degree) as scarcely to require the alteration suggested. EFC. | ||
| Scan118 | Comparison of present and revised ignition timing settings for the Phantom engine. | ||
| View original record | 27.9.28. PHANTOM IGNITION TIMING. Present. RL/M19.9.28. Battery hand range. 30° 30° Magneto hand range. 8° 15° Auto range. 28° to 30° 25° Full battery retard. 10° A.T.C. 10° Full magneto retard. 12°… | ||
| Scan119 | Blueprint diagram illustrating the ignition timing for an E.A.C.10 engine. | ||
| View original record | DEGREES OF ADVANCE ON ENGINE -20 -10 0 10 20 30 40 50 FULL BATTERY RETARD 10° FULL MAG RETARD 5° RETARD ADVANCE A T C B T C IGNITION LEVER TRAVEL IGNITION TIMING DIAGRAM FOR E.A.C.10 ENGINE To… | ||
| Scan120 | On the performance of a lightened clutch and flywheel after 10,000 miles, detailing a rusting issue with the ball race and lubrication problems. | ||
| View original record | To R. from Hs/Rn. c. to BJ. WoR. c. to E. DA. c. to BY. ORIGINAL Hs/Rn5/LG2. 10.28. LIGHTENED CLUTCH AND FLYWHEEL (NO.5.) X7300 SERRATED UNIVERSAL JOINT. L.O.P. G.76429. This has now run 10,000 miles… | ||
| Scan121 | Testing and issues with oval-section rubber water joints on development engines. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to E. RG. c. to BY. Hs2/LG2.10.28. F.11. & 'H' RUBBER WATER JOINT. X3866 The moulded oval-section rubbers, used in place of the rectangular section rubbers, are being… | ||
| Scan122 | Customer's suggestion for a higher output dynamo with a 'dual debit' system. | ||
| View original record | To R. from EFC. c. BJ. E. c. EY. PN. c. CWB. EFC3/T3.10.28. RE DYNAMO, Y8671 (struck through) X8864 One of our customers who sent us an enquiry for a higher output dynamo suggests a dynamo with a… | ||
| Scan123 | Unsatisfactory position of the ignition coil on the Phantom chassis due to overheating. | ||
| View original record | To R. from EFC. c. BJ. BY. E. EFC1/T3.10.28. PHANTOM IGNITION COIL POSITION. x8710 There is now some amount of evidence that the position of the Ignition Coil on the Phantom, where it is subject to… | ||
| Scan124 | Report page detailing conductance tests performed on insulations at high temperatures. | ||
| View original record | -2- Contd. starting in each case from cold or ambient temperature, in addition to which we are conducting conductance tests of insulations xx at high temperatures on the bench. EFC. | ||
| Scan125 | Air intake tests on a 'Hart' aircraft at Martlesham Heath, comparing standard and special intakes. | ||
| View original record | To R. from Lr. c. to BJ. Wor. c. to E. RG. c. to BY. EP. c. to Lp. [STAMP] ORIGINAL X3933 Lrl/LG4.10.28. RE. RR. AIR INTAKES ON AIR TESTS IN X3933 FLIGHT AT MARTLESHAM. I visited Martlesham Heath… | ||
| Scan126 | Modifications to engine intakes and flight test results for 'Antelope', 'Fox', and 'Hart' aircraft. | ||
| View original record | -a- contd :- stood that the Avro 'Antelope' be fitted with the same type of intakes. It was agreed at Derby that to change the balance pipe would take too long and since both Mr. Archer and Flt. Lt.… | ||
| Scan127 | Engine flight performance, detailing improvements to prevent cutting out and suggestions for new air intake design. | ||
| View original record | contd :- -3- indicated by the smoothness of the engine in flight. No cutting out of the engine when side slipping which occurs with the normal intakes. Improvement in climb. Tendency to automatically… | ||
| Scan128 | Recommendation to adopt cadmium plating for Phantom chassis parts based on successful 10,000-mile testing. | ||
| View original record | To R. from Hs/GWH. c. to BJ. Wor. c. to E. DA. c. to BY. ORIGINAL V1360 PHANTOM CHASSIS. RE. CADMIUM PLATING. We recommend the following parts to be cadmium plated. We have run 10,000 miles on 12-EX… | ||
| Scan129 | Parts list for the water pump drive complete and governor assembly. | ||
| View original record | ENGINE UNIT. WATER PUMP DRIVE COMPLETE AND GOVERNOR. Drg.No. ITEM. Drg. No. Item. E.74432 Shaft. E.72072 Bush. E.72100 Locking nut. E.72076 Screw. E.76419 Driving piece. E.72073 Link Brg. Bush.… | ||
| Scan130 | Parts list for the Ignition Distributor, Clutch, and Slipper Wheels & Spring Drive. | ||
| View original record | IGNITION DISTRIBUTOR. Drg. No. Item. D. 50710 Cam. E. 74202 Shaft. K. 2713 Screw. CLUTCH. G. 76376 Spherical brg. & cover. G. 76288 Clutch drive piece. G. 76290 Clutch shaft. SLIPPER WHEELS & SPRING… | ||
| Scan131 | Parts list for a complete servo linkage assembly. | ||
| View original record | SERVO LINKAGE COMPLETE. Drg. No. ITEM. G.72682 Pull rod. G.72526 " " G.73353 " " G.72510 Short type jaw. G.72510 Long " " G.72118 & Jaw. G.72510 G.72473 Levers. G.72509 Servo drag links. G.72508… | ||
| Scan132 | Parts list for the servo shaft and associated fittings. | ||
| View original record | SERVO SHAFT AND FITTINGS. Drg.No. Item. G.74848 Servo Shaft. G.72476 Friction plate driving disc. G.72470 Retaining plate. G.75559 Adjusting Nut. G.728990/1 Levers. G.74779 Adjusting Nut Washer.… | ||
| Scan133 | List of drawing numbers for front and rear brake components and a note on experimental parts. | ||
| View original record | FRONT BRAKES. Drg.No. Item. G.74224 Distance Piece. G.70023 Pin. G.74237/8 Toggle forks. G.74560/1 Toggle shaft. G.74246 Pivot caps. C.74243 Bottom Plate. E.6432 Nuts. F.10886 Washers. G.74223 Nuts.… | ||
| Scan134 | The unsatisfactory operation of the central lubrication pump for the Phantom Chassis 12-EX. | ||
| View original record | To R. from Hs/GWH c. to BJ. Wor. c. to E. DA. c. to BY. ORIGINAL Hs/GWH/LG6.10.28. PHANTOM CHASSIS 12-EX. CENTRAL LUBRICATION PUMP TO N.SCH:2647. Y3806 The operation of the oil pump is very… | ||
| Scan135 | Performance and availability of new silent tread tyres for Phantom and 20 HP cars. | ||
| View original record | To R. from Hs. C. to DJ. WOR. C. to E. DA. C. to EY. ORIGINAL! Hsl/LG9.10.28. CAR - TYRES. [Handwritten:] X9820 [crossed out] X5820 [circled] X4050. Phantom cars are now being despatched with tyres… | ||
| Scan136 | Outlining an experimental scheme for an automatic boost pressure regulator on supercharged engines. | ||
| View original record | To R. from Hs. c. to BJ. RG. c. to E. Wor. c. to BY. Lr. X4680 ORIGINAL Hs/Tsnl/LG9.10.28. AUTOMATIC BOOST PRESSURE REGULATOR. X4033 --------- X4680 If you are in agreement, the attached sketches shew… | ||
| Scan137 | Issues with Aneroid type boost gauges and a proposed solution using an isolating tap. | ||
| View original record | contd :- -2- the boost would be maintained with this arrangement, but is not with a gate throttle. Tests with Aneroid type boost gauges with engines on the bed have shewn that it does not pay to… | ||
| Scan138 | Sketch showing how an automatic boost regulator provides a self-adjusting throttle stop. | ||
| View original record | SKETCH SHOWING HOW AUTO. BOOST REGULATOR PROVIDES SELF-ADJUSTING THROTTLE STOP. ISOLATING TAP CAM. EXISTING THROTTLE LEVER THIS SCHEME SHOWS HOW THE REGUL-ATOR CAN BE INCORPORATED ON AN ENGINE. TO… | ||
| Scan139 | Blank document with a purple ink stamp from the Print Room in Derby. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 9 OCT 1928 DERBY. | ||
| Scan140 | Schematic diagram of an automatic boost-pressure regulator system. | ||
| View original record | AUTOMATIC BOOST-PRESSURE REGULATOR. SUPERCHARGER PRESSURE DEPRESSION ISOLATING TAP. VALVE. CAM WORKING AS THROTTLE-STOP PILOT'S HAND THROTTLE USUAL FRICTION DEVICE 8/10/28. | ||
| Scan141 | Almost blank document with a 'Print Room' date stamp. | ||
| View original record | The main body of the document contains extremely faint text or drawings which are unreadable. Stamped Text: ROYCE, LIMITED PRINT ROOM, 9 OCT 1928 DERBY. | ||
| Scan142 | Proposal for an experimental automatic boost pressure regulator for supercharged engines. | ||
| View original record | To R. from Hs. C. to HJ. RG. C. to E. WoR. C. to DY. Lr. ORIGINAL Hs/Tsm1/LG9.10.28. AUTOMATIC BOOST PRESSURE REGULATOR. X4680 X7033 If you are in agreement, the attached sketches shew the method by… | ||
| Scan143 | Continued memorandum detailing tests and solutions for issues with Aneroid type boost gauges on engines. | ||
| View original record | contd :- -2- the boost would be maintained with this arrangement, but is not with a gate throttle. Tests with Aneroid type boost gauges with engines on the bed have shewn that it does not pay to… | ||
| Scan144 | Sketch showing how an automatic boost regulator provides a self-adjusting throttle stop. | ||
| View original record | SKETCH SHOWING HOW AUTO. BOOST REGULATOR PROVIDES SELF-ADJUSTING THROTTLE STOP. ISOLATING TAP CAM. EXISTING THROTTLE LEVER THIS SCHEME SHOWS HOW THE REGULATOR CAN BE INCORPORATED ON AN ENGINE. TO… | ||
| Scan145 | Blank page marked with a 'Print Room' date stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 10 OCT 1928 DERBY. | ||
| Scan146 | Schematic diagram of an automatic boost-pressure regulator. | ||
| View original record | AUTOMATIC BOOST-PRESSURE REGULATOR. SUPERCHARGER PRESSURE ISOLATING TAP. VALVE. DEPRESSION CAM WORKING AS THROTTLE-STOP PILOTS HAND THROTTLE USUAL FRICTION DEVICE 8/10/28. | ||
| Scan147 | Blank folded page with a 'Patent Room, Derby' stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED PATENT ROOM, 10 OCT 1928 DERBY. | ||
| Scan148 | The performance and required alterations for the Sequence Starter Motor and Gear, No. 2B Scheme. | ||
| View original record | To R. from EFC. c. RJ. E. EY. EFC4/T10.10.28. X7625 D X7658B SEQUENCE STARTER MOTOR AND GEAR. NO. 2B SCHEME. We have now had considerable experience of the above on chassis 9-EX. The motor in question… | ||
| Scan149 | Issues with armature taper, engagement thump, and potential solutions involving stronger springs. | ||
| View original record | -2- Contd. able to return the armature so as to give a second chance of engagement. As we shall further refer to below, we infer that the present armature taper of 3.100 to 2.900 is too large and we… | ||
| Scan150 | Motor performance issues and proposed design changes to the armature and windings. | ||
| View original record | -3- Contd. (4) There is a rather high pitched gear scream of relatively short duration when the first engine explosion throws the motor out of gear. (N.B. Disengaging end thump occurs when running on… | ||
| Scan151 | Test experience and issues, such as piston knocks when cold, with SS. Single Bolt Pedestal Pistons. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor. c. to E. DA. c. to EY. ORIGINAL. Hs/ACL1/LG12.10.28. SS. SINGLE BOLT PEDESTAL PISTONS. LeC. 2554. F7040 E.7751 S. We have had considerable running experience on the… | ||
| Scan152 | Engine under-lubrication issues, cold starts, and potential piston design improvements. | ||
| View original record | contd :- -2- would drain away from the cylinder walls and it is conceivable that an appreciable time would elapse after starting from cold before the cyl. bores would receive adequate lubrication by… | ||
| Scan153 | The optimal number of piston rings and a proposal for testing a new piston design. | ||
| View original record | contd :- -3- With regard to the number of piston rings we consider we should benefit by employing more than three. The Test Dept. have experienced a marked improvement on the 20 HP. chassis since… | ||
| Scan154 | Failures and improvements to the Sequence Starter Motor and Gear, Scheme No. 2B. | ||
| View original record | To R. From EFC. c. BJ. E. EY. ORIGINAL EFC2/T13.10.28. SEQUENCE STARTER MOTOR AND GEAR No. 2B SCHEME. Further to our EFC4/110.10.28, there were originally two minor failings causing failure to… | ||
| Scan155 | Gear engagement failures, discussing issues with springs, armatures, and potential modifications. | ||
| View original record | -2- Contd. The B failure appeared to occur only with the stronger spring because with the weaker spring the excess of longitudinal traction over spring pressure was sufficient to overcome the slight… | ||
| Scan156 | The nitrogenisation of steel process observed at the Hispano Works for crankshafts and cylinder liners. | ||
| View original record | To R. from Hs/Rn. c.c. to BJ. Wor. c.c. to E. DA. c.c. to RG. BY. ORIGINAL Hs/RnL/LG13.10.28. NITROGENISATION OF STEEL. PARIS SHOW XL4469 X4214 X8609 Through Col. Hawkins and the courtesy of Mons.… | ||
| Scan157 | Visit to the Aubert & Duval plant in Paris to observe a nitrogen hardening process for gears and other 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 Hispanos development work. We there found being treated gears of every description -… | ||
| Scan158 | Visit to the Aubert & Duval plant regarding a metal hardening and nitrogenising process. | ||
| 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 Hispanos development work. We there found being treated gears of every description -… | ||
| Scan159 | Summary of a cheap, simple, and distortion-free steel hardening process for use on parts like crankshafts and brake drums. | ||
| 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… | ||
| Scan160 | Visit to the Solex Carburetter Co. regarding carburetter 'freezing up' issues and testing methods. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to E. RG. c. to DA. BY. Hs/Rm2/LG16.10.28. ORIGINAL PARIS SALON - 1928. X3609 CARBURETTERS. We went over the Works of The Solex Carburetter Co. in conjunction with… | ||
| Scan161 | Page 2 of a report on engine and carburettor investigations, including single jet carbs, manifold design, and competitor analysis. | ||
| View original record | contd :- -2- carrying a measured quantity of fuel. The whole system can be set in motion by a single switch and exact measurements taken over the whole speed range of the engine of : (1) the… | ||
| Scan162 | Continued notes on a car's rear axle and gearbox performance, followed by observations on the suspension of other vehicles. | ||
| View original record | contd :- -3- unfortunately had a noisy rear axle. We took it to a quiet lane and though the axle rather spoilt the test we formed the opinion that it was difficult to say whether the car was on 3rd.… | ||
| Scan163 | Chassis design, including details on the suspension, steering, engine, and overall construction. | ||
| View original record | contd :- -4- supported therefrom through bell cranked levers having about 4/1 ratio as shewn in the attached sketches. These levers are mounted in Timken taper roller bearings. Each spring consists of… | ||
| Scan164 | Technical evaluation report comparing different car suspension systems and ride quality. | ||
| View original record | contd :- -5- as 2 1/2" only. The maximum permissible deflection as 8 1/2". The car body was an occasional 4-seater with one spare wheel at the back. In spite of the relatively strong springs the car… | ||
| Scan165 | Analysis of a car's unconventional suspension, steering, and racing performance. | ||
| View original record | contd :- -6- with RR. cars, but at the moment there is no big car with a good unconventional suspension. It would offer considerable opportunity for an experimental investigation with regard to… | ||
| Scan166 | Observations on vehicle design trends, including integrated luggage/spare wheel carriers and types of joints used. | ||
| View original record | contd :- -7- It will doubtless develop into a vehicle more suited to the requirements of the average citizen when its present pressing need for advertisement has subsided. OTHER DETAILS. (1) We noted… | ||
| Scan167 | Article detailing the operation and design of various automotive gearboxes, transmissions, and clutches with diagrams. | ||
| View original record | nº 101 Omnia 337 — Le démultiplicateur Berliet comprend deux harnais d'engrenages à prise interne que l'on peut craboter avec l'arbre secondaire qui est en l'espèce l'arbre de transmission. Comme les… | ||
| Scan168 | Blank document page with a 'Print Room' date stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, A 16 OCT 1928 | ||
| Scan169 | Blueprint diagrams illustrating an independent suspension and chassis system. | ||
| View original record | HOW THE INDEPENDENT SPRINGING IS CARRIED OUT, AT THE FORWARD END OF CHASSIS. THE REAR END OF THE CHASSIS WHICH CONSISTS PRIMARILY OF TWO LARGETUBES WITH SPECIAL INDEPENDENT SPRINGS. SECTION OF THE… | ||
| Scan170 | Heavily faded document page with an official date stamp from the print room. | ||
| View original record | ROYCE, LIMITED PRINT ROOM, 17 OCT 1928 DERBY. [Illegible faded text] | ||
| Scan171 | Failure of various washers to eliminate 'end thump' on a starter motor and proposing a new armature design. | ||
| View original record | To R. from EFC. c. PJ. E. BW. ORIGINAL EFC4/T17.10.28. SEQUENCE STARTER MOTOR & GEAR. Y7655B Y7625B Further to our EFC2/T13.10.28 the rubber washer which was temporarily very effective in almost… | ||
| Scan172 | Running conditions and ongoing tests for Super Sports Engine No. S.S.3. | ||
| View original record | To R. from Hs. c. BJ. E. c. Da. Rg. c. Bv. Wor. Hsl/T18.10.28. X7771 X459 SUPER SPORTS ENGINE. Engine No. S.S.3. Total running time to date 46 1/4 hrs Running conditions:- Standard Phantom… | ||
| Scan173 | Engine modifications and ongoing issues with the exhaust manifold, timing gears, pistons, and oil system. | ||
| View original record | Contd. -2- The exhaust of this engine is rather noisy; the noise apparently penetrates the comparatively thin material from which the manifold is made. The brazing of the large flange on the manifold… | ||
| Scan174 | Modifying oil flow to prevent leaks and addressing valve mechanism noise. | ||
| View original record | -3- the greater capacity seems undesirable. As an alternative to reducing the pump capacity, the relief valve should be increased in size. A modification of the rocker shaft is being prepared, which… | ||
| Scan175 | Graph of petrol consumption curves against engine RPM for a Super Sports engine. | ||
| View original record | PETROL CONSUMPTION CURVES (SUPER SPORTS ENGINE). ENGINE No SS-3. STD. PHANTOM CARBURETTOR (WITH HOT SPOT). COMPLETE BED EXHAUST SYSTEM. FOR POWER CURVE SEE V445. CONSUMPTION (PTS / HR). SP. CONS. (PTS… | ||
| Scan176 | The reverse of a document with a purple ink date stamp from Derby. | ||
| View original record | REC'D 18 OCT 1928 DERBY. | ||
| Scan177 | Graph showing the power curve for a Super Sports engine with various configurations and comparisons. | ||
| View original record | V445. SUPER SPORTS ENGINE POWER CURVE. ENGINE Nọ SS-3. COMP. RATIO = 4.5. HOT SPOT IN ACTION. COMPLETE BED EXHAUST SYSTEM. 116° CAMSHAFT. (E77322). STANDARD "PHANTOM" CARBURETTOR. BRAKE HORSE POWER.… | ||
| Scan178 | Page marked with a receiving stamp, otherwise blank. | ||
| View original record | [stamp] ...ROYCE, LIMITED ... ROOM, 18 OCT 1928 BY. | ||
| Scan179 | Clutch jagging, valve guide clearances, and rocker shaft oiling on a 20 HP car. | ||
| View original record | To R. From Hs. c. to BU. Worl c. to E. DA. c. to BY. ORIGINAL Hs4/LG22.10.28. 20 HP. 12G-4. X5300 (crossed out) X5090 (handwritten) The clutch on this car was inclined to jagger before the car was… | ||
| Scan180 | Oiling issues and recommending a 3-stage relief valve for the 20 HP engine, similar to the Phantom. | ||
| View original record | contd :- -2- that car is that we only have a one-stage relief valve. The feed to the rockers is simply the over-flow oil and is under no definite pressure. The new type relief valve which was made for… | ||
| Scan181 | Concerns about ignition wire tubing and proposing a change to bakelite tubes to mitigate heat damage. | ||
| View original record | To R. & E. from EFC. EFC2/T24.10.28. c. BJ. Da. c. By. Wor. SS. IGNITION WIRE TUBING. On the SS. engine we feel a little concerned with the exposure of one of the ignition wire tubes and ignition… | ||
| Scan182 | Suggestion to use earthed bakelite-covered metal tubes for wiring on an SS. engine to prevent electrical interference. | ||
| View original record | -2- Contd. of sufficient quantity to enable that wire to give a spark at its plug. It appears, however, that we do still occasionally get such an effect even when the two groups of wires are in… | ||
| Scan183 | Responding to criticism of delays in car improvements, detailing experimental work undertaken on engines, chassis, and superchargers. | ||
| View original record | To Rj. from Hs. c. to BY. Wor. c. to BJ. RG. c. to C.✓ SG. ORIGINAL. Hsl/LG24.10.28. PROGRESS OF CAR IMPROVEMENTS. X2917 X5770 ~~X7770~~ We are sorry to hear you are disappointed with the progress of… | ||
| Scan184 | Internal secret memo discussing the sale and status of experimental Phantom Sports Cars. | ||
| View original record | To R. from Hs. c. to BJ. WoT. c. to E. DA. c. to BY. SG. [STAMP] ORIGINAL S E C R E T. Hs2/LG25.10.28. [Handwritten] V7770 47830 x180 PHANTOM SPORTS CAR. We have heard from Sales that the sports car… | ||
| Scan185 | High-speed wobble tests comparing different Michelin and Dunlop tyres. | ||
| View original record | To R. from Hs/Rn. c. to BJ. Wor. E. c. to DA. c. to BY. ORIGINAL Hs/Rm7/LG26.10.28. HIGH SPEED WOBBLES. XL57 We have recently been carrying out tests on Michelin tyres. These tyres are called 17 X 50… | ||
| Scan186 | Weight comparison table between Michelin and standard 6.75' Dunlop tyres, tubes, and wheels. | ||
| View original record | contd :- -2- Particulars of the Michelin compared with the standard 6.75" Dunlop are :- Weight. | DUNLOP 6.75 - 21" rims. | MICHELIN. 17 X 50. Tyre. | 36 1/4 lbs. | 35 lbs. Tube. | 5 lbs. | 4 lbs.… | ||
| Scan187 | 'SS' engine development work, comparing its performance and specifications against the F.2.B. series engine. | ||
| View original record | To R: from Hs/ACL c.c. to BJ. Wor. c.c. to E. DA. c.c. to BY. ORIGINAL. Hs/ACL1/LG26:10:28 'SS' ENGINE DEVELOPMENT WORK. X7770 (crossed out) X7771 We have carried out various tests on the 'SS' engine… | ||
| Scan188 | Report discussing engine power, carburettor performance, and compression ratios for the SS and F.2.B. series engines. | ||
| View original record | contd :- -2- carburetters, coupled with the refined low speed and metering attributes of our present chassis carburetter. Previous attempts to increase the power have been somewhat masked by the high… | ||
| Scan189 | Analysis of engine power output and airflow tests comparing SS and standard F.2.B. cylinder heads and valves. | ||
| View original record | contd :- -3- becoming troubled with detonations. We will test ratios up to 5 to 1. Analysing the results of the tests and referring to the curves shewing the power output of the SS. with low… | ||
| Scan190 | Proposal for further tests on engine valve lift and air flow to improve volumetric efficiency and power. | ||
| View original record | contd :- -4- and secondly the appreciable increase in flow when the valve is lifted above the standard amount. The std. lift is .429 and these diagrams shew that by increasing the valve lift to .600… | ||
| Scan191 | Engine development, focusing on induction systems, carburetters, manifolds, and pistons. | ||
| View original record | contd :- -5- With regard to the other tests we have carried out we consider the six port induction system gives better distribution than our previous four-port engines. The vertical Claudel… | ||
| Scan192 | Engine noise issues related to springs and valves, with proposed solutions for F.Z.B. and SS engines. | ||
| View original record | contd :- -6- siderable spring noise with the double springs being manifest by a loud 'swishing' noise at various engine speeds. This we trace to spring periods, the noise being due to the coils… | ||
| Scan193 | Graph plotting the Mechanical Efficiency and Friction Horsepower of a Super Sports Engine against its RPM. | ||
| View original record | MECHANICAL EFFICIENCY (SUPER SPORTS ENGINE) ENGINE N° SS-3 PERCENTAGE MECHANICAL EFFICIENCY 100% 90% 80% 70% R.P.M. OF ENGINE. 1000 1500 2000 2500 MECH. EFFICy FRICTION H.P. HORSE POWER. 30 20 10 0… | ||
| Scan194 | Blank document back with a 'Print Room' date stamp from the Derby factory. | ||
| View original record | ROYCE, LIMITED PRINT ROOM, 26 OCT 1928 DERBY. | ||
| Scan195 | Graph comparing air flow through Super Sports and F-2-B series inlet valves against valve lift. | ||
| View original record | V469. 26-10-28. COMPARISON OF AIR FLOW THRO' INLET VALVES (SUPER SPORTS & F-2-B SERIES). PRESSURE DROP ACROSS VALVE = 2.8 LBS/□" AIR FLOW (POUNDS PER MINUTE) VALVE LIFT (INCHES). SUPER SPORTS INLET… | ||
| Scan196 | Graph comparing the Brake Horse Power of different engine configurations against RPM. | ||
| View original record | V468. SUPER SPORTS ENGINE POWER COMPARISON. COMPLETE TEST BED EXHAUST SYSTEM. BRAKE HORSE POWER R.P.M. OF ENGINE S.S. ENGINE (COMP. RATIO = 4.5) CLAUDEL CARB. STD. PHANTOM CARB. STD. F.2.B SERIES… | ||
| Scan197 | Blueprint of a rig for measuring airflow past valves on an S.S. cylinder head for valve tests. | ||
| View original record | S.S. VALVE TESTS. THIS APPARATUS IS USED FOR MEASURING THE AIR FLOW PAST THE VALVES FOR DIFFERENT PRESSURE HEADS & VARIOUS LIFT. VALVE LIFT ADJ. SCREW DELIVERY PIPE. TUBE CONNECTED TO CYL. HEAD 4.25… | ||
| Scan198 | Stamped by the Print Room in Derby, with the main body of text being illegible. | ||
| View original record | [Illegible text] STAMPED: ROLLS-ROYCE, LIMITED PRINT ROOM, 26 OCT 1928 DERBY. | ||
| Scan199 | Power loss and noise issues with a super sports exhaust system. | ||
| View original record | To R. from Hs. c.c. to BJ. WoR. c.c. to R. DA. c.c. to BY. ORIGINAL Hsl/LG27.10.28. SUPER SPORTS EXHAUST SYSTEM. X7230 / X7771 We attach curves which shew the loss due to the exhaust manifold. As this… | ||
| Scan200 | Graph showing the power loss to the exhaust manifold for a Super Sports Engine, comparing open ports to a manifold. | ||
| View original record | POWER LOSS TO EXHAUST MANIFOLD. SUPER SPORTS ENGINE. ENGINE No SS.3. STD. 'PHANTOM' CARBURETTOR. BRAKE HORSE POWER 130 110 90 70 50 OPEN EXHAUST PORTS. EXHAUST MANIFOLD TO LEC. 2518. PERCENTAGE LOSS… | ||
| Scan201 | Blank document page with a purple ink stamp on the bottom right corner. | ||
| View original record | -ROYCE, LIMITED MT ROOM 27 OCT 1928 DERBY. | ||
| Scan202 | The objectives and initial findings from tests carried out on 40/50 suspension axle movement. | ||
| View original record | To R. from Hs/Rm. c.c. to BJ. Wor. c.c. to RG. E. c.c. to DA. BY. c.c. to OY. ORIGINAL Hs/Rm2/LG29.10.28. 40/50 SUSPENSION. X8410 Attached are the results of a number of tests carried out on axle… | ||
| Scan203 | Analysis of vehicle suspension, axle movement, and ride comfort at various speeds and road conditions. | ||
| View original record | contd :- -2- velocity increase up to 2 ft/sec, but from this point upwards a rapid rise in pressure would be desirable. The max. velocity we have to deal with is about 5 ft/sec. Even this, it appears,… | ||
| Scan204 | Test results for vehicle axle movement, car swaying, and axle velocities under various conditions. | ||
| View original record | contd :- -3- AMPLITUDE AXLE MOVEMENT. Undamped. Pot holes 23 m.p.h. 1.20" 35 m.p.h. 1.50" Damped. Pot holes. 23 m.p.h. .900" 35 m.p.h. 1.000" Main road. 23 m.p.h. .700" 35 m.p.h. .700" 45 m.p.h. .844"… | ||
| Scan205 | Car velocities under different conditions and a description of an axle motion experiment. | ||
| View original record | contd :- -4- CAR VELOCITIES IN EXCEPTIONAL CIRCUMSTANCES WHEN THE AXLE IS WELL DAMPED. ft/sec. Hump backed bridge 35 m.p.h. 1.4 40 m.p.h. 3.7 Level crossing. 35 m.p.h. 1.15 40 m.p.h. 1.75 Ditto - axle… | ||
| Scan206 | Typed report on vehicle suspension dynamics, detailing axle velocity, damping tests, and natural frequency. | ||
| View original record | contd :- -5- The small numerals indicate the axle velocity in ft/sec. at the point marked. This is obtained from the slope of the line at that point, taking into account the horizontal scale of time… | ||
| Scan207 | Chart of rear axle motion experiments for the Phantom 98 N.K. comparing different damping settings on various road surfaces. | ||
| View original record | REAR AXLE MOTION EXPERIMENTS. — PHANTOM 98 N.K. SHEET 2 BURTON ROAD. RAILWAY LEVEL CROSSING COMING IN TOWARDS DERBY. 23 M.P.H. x 4.12 No DAMPERS. x 5.34 HARTFORDS ONLY SET AT 40 LBS. 35 M.P.H. x 8.88… | ||
| Scan208 | Graphs from rear axle motion experiments on a Phantom 38 NK, testing different speeds, surfaces, and shock absorber settings. | ||
| View original record | REAR AXLE MOTION EXPERIMENTS. SHEET I PHANTOM 38 N.K. SURFACE - AVERAGE MAIN ROAD. SHARDLOW STRAIGHT. M.P.H 23 NO SHOCK ABSORBERS. x 5.34 M.P.H 35 M.P.H 45 MAIN ROADS UNDAMPED. SWAYING AMPLITUDE 2.5"… | ||