Rolls-Royce Archives
| Identifier | Entry | ||
| Scan001 | Electrical system's requirements for high-current accessories like cigar lighters. | ||
| View original record | To E. from EFC. c. RY. RY/RD. ORIGINAL EFC6/T2.11.28. SS. ELECTRICAL SYSTEM. -------------------- X7740/1 Further to our EFC2/T2.11.28, it is now pointed out that some accessories, e.g. a cigar… | ||
| Scan002 | Discussions with Dunlop to develop a new, safer tyre with a broader and deeper non-skid tread. | ||
| View original record | To R: from Hs/An. c. to E.J. Wor. c. to E. DA. c. to EY. ORIGINAL! Hs/An6/LG2.11.28. TYRES. X4050 X8005 30th.ult. We visited the Dunlop Works on Tues. the the tyre with them. We pointed out that for… | ||
| Scan003 | Testing experimental rubber mixings for engine mountings on the 40/50 model. | ||
| View original record | contd :- -2- of getting a rubber for the engine mounting that will not take a permanent set; whilst they wish that we could increase the quantity of rubber to take the load on the 40/50, they believe… | ||
| Scan004 | Tests comparing the heating of ignition coils in different positions on 20 HP and 40/50 chassis. | ||
| View original record | To R. from EFC. c. PJ. E. EX. ORIGINAL PHANTOM IGNITION COIL POSITION. XS-710 X8710 Further to our EFC1/T3.10.28 we have now completed a series of tests with a view to comparing the heating of the… | ||
| Scan005 | Temperature tests on an ignition coil for different chassis models. | ||
| View original record | Contd. -2- EFC4/T2.11.28. Corresponding temperatures observed in a similar way after the battery ignition had been operating for an additional 1 1/2 hours were 93 and 93 respectively. Corresponding… | ||
| Scan006 | Grading and sizing of fuse wire for main and accessory electrical distribution boards. | ||
| View original record | To E. from EFC. c. BY. BY/RD. ORIGINAL EFC2/T2.11.28. X7745/1 SS. ELECTRICAL SYSTEM. Referring to your LeC's 2595/6/8 and the question of fusing, it has been noted that you have indicated two strands… | ||
| Scan007 | The design challenges and experimental testing of a No. 2B starter motor and gear scheme. | ||
| View original record | To R. from EFC. c. BJ. E. c. Da. Wor. c. Ev. SS. STARTER MOTOR & GEAR, No.2B.SCHEME. We have previously referred to the fact that the fundamental dimensions of the motor, taken together with the fact… | ||
| Scan008 | Modifications to the SS motor, including ratio changes, armature length, and engagement issues. | ||
| View original record | EFC4/T8.11.28. -2- Contd. and we anticipate in the light of our later experience, a better performance from this than from the 41 slot of which the machines for the SS. cars are at present made. We do… | ||
| Scan009 | The 'SS' starter motor, criticising its lack of reserve power compared to the existing reliable Phantom unit. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to E. DA. c. to BY. ORIGINAL. 'SS' STARTER MOTOR. X7625 X76522 X8620 One of the most anxious points we consider in connection with the 'SS' is the Starter Motor. The… | ||
| Scan010 | The excessive wear of a pinion and issues with the starter gears on car 14-EX. | ||
| View original record | contd :- -2- We are returning to you the small pinion off your car 14-EX. We consider, for the moderate amount of work this car has done, the wear on the pinion is excessive. We have had considerable… | ||
| Scan011 | Preliminary test report on the expanding throat carburetter fitted to the 'SS' engine. | ||
| View original record | To R. from Hs/ACL. c.c. to BJ. Wo r. c.c. to E. DA. c.c. to BY. ORIGINAL Hs/ACL1/LGS.11.28. RR. EXPANDING THROAT CARBURETTER. +7080 We have carried out some preliminary tests with the RR. expanding… | ||
| Scan012 | Analysis of engine performance relating to choke area, carburetter restrictors, and induction pipe depression. | ||
| View original record | contd :- -2- a free choke area of 1.53 sq.ins. gave low induction pipe depression and consequently good power, with the maximum of suction at the choke. The minimum free area through the expanding… | ||
| Scan013 | Preliminary carburettor tests, discussing performance and recommending a modified Phantom type carburettor for the first 'SS' engines. | ||
| View original record | contd :- -3- of various sizes starting with one which will allow 1.53 sq. ins. in its fully withdrawn position and select a piston spring which will allow the restrictor to become fully withdrawn at… | ||
| Scan014 | Performance graph comparing an expanding throat carburettor against standard and Claudel-Hobson carburettors for engine S5-3. | ||
| View original record | EXPANDING THROAT CARBURETTOR. ENGINE No S5-3. COMP. RATIO = 4.5 HOT SPOT IN ACTION. TEST BED EXHAUST SYSTEM. BRAKE HORSE POWER: EXPANDING THROAT CARB. STD. PHANTOM CARB. CLAUDEL HOBSON. INDUCTION… | ||
| Scan015 | Page with a purple stamp from the Print Room in Derby. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 8 NOV 1928 DERBY. | ||
| Scan016 | Groove wear found on S.S. engine tappet pads after 50 hours of testing and a proposal for design improvement. | ||
| View original record | To R. from Hs/ACL. c. BJ. Wor. c. E. Da. By. S.S. TAPPETS. X2060 The S.S. engine has now completed 50 hours running on various tests and we have stripped it down for examination. We find all the… | ||
| Scan017 | Technical memo recommending against changing the connecting rods and discussing crankshaft lubrication for the 'SS' engine. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to E. DA. c. to BY. ORIGINAL Hsl/LG9.11.28 'SS' ENGINE. X7720 X7030 X 7010 CONNECTING RODS. We recommend that on the first batch of 'SS' cars we stick to the present… | ||
| Scan018 | Crankshaft oiling schemes for the Phantom and 'SS' models, recommending sticking with the current Phantom system and continuing experimental investigations. | ||
| View original record | contd :- -2- As a matter of fact the Production Test would like more oil. Springfield are using extra oil. In view of this we think it would be very unwise to depart from the present Phantom… | ||
| Scan019 | Advantages of body subframes, including noise reduction and ease of fitting the body to the chassis. | ||
| View original record | To R. From Hs. c. to BJ. LHS. c. to C. SG. c. to HO. DA/EV. ORIGINAL Hs3/LG13.11.28. BODY SUBFRAMES. X5380 X7380 X8380 Over four years ago we went to a lot of trouble to demonstrate to Sales and the… | ||
| Scan020 | Special visit to test the method of carrying a car body on a separate underframe. | ||
| View original record | COPY. REPORT ON SPECIAL VISIT TO DERBY BY THE COACHWORK SUB-COMMITTEE ON OCT. 30TH. TO TEST THE METHOD OF CARRYING THE BODY OF A CAR ON A SEPARATE UNDERFRAME. PRESENT : SG. EV. HO. C. Hs. in the first… | ||
| Scan021 | Report discussing a vehicle's swaying characteristics and a criticized design scheme. | ||
| View original record | contd :- -2- This scheme has been criticised from the point of view of swaying. The car, however, was driven at various speeds round corners, but the committee were not conscious of any undue swaying.… | ||
| Scan022 | The road test and characteristics of a 1.5 litre Alfa Romeo with a 4-seater fabric body. | ||
| View original record | To R. from Hs/Rn. c: to BJ. Wor. c: to E. DA. c: to By. SG. ORIGINAL Hs/Rn2/LG1 3.11.28. 1 1/2 LITRE ALFA ROMEO. X4482 75770 2.44" X 3.22" 6 cyl. 5 main bearings - top gear 5.4/1 We spent last week… | ||
| Scan023 | Engine smoothness and power characteristics, detailing vibration periods and torque. | ||
| View original record | contd :- -2- fact that the tyres were dead smooth (the car has done 8000 miles) one could drive it really fast on wet roads with no apprehension. ( 2) Smoothness of the engine. The engine was… | ||
| Scan024 | Vehicle test report page detailing performance characteristics, issues, and comparisons with other vehicles. | ||
| View original record | contd :- -3- Auto ignition advance was fitted. The car could be made to detonate at full torque low speed. There was no torque reaction or indication at any speed that the car had been driven hard for… | ||
| Scan025 | Client's comparison between the 20 HP, a supercharged Alfa Romeo, and the Phantom. | ||
| View original record | contd :- -4- for Continental touring in the summer. He is most attracted by the silence, sweetness and suspension of the 20 HP. but its performance is not good enough for him. He is delighted with the… | ||
| Scan026 | Failures of front axle control damper levers during testing, attributing it to increased rigidity and proposing to strengthen the parts. | ||
| View original record | To R. from Hs/Rn. c. to B.J. WoR. c. to E. DA. c. to By. ORIGINAL Hs/Rn3/LG13.11.28. X7420 X7520 FRONT AXLE CONTROL DAMPER. We have broken three or four of the levers in the front axle control dampers… | ||
| Scan027 | Sketch illustrating a component fracture. | ||
| View original record | F74896 FRACTURE FRACTURE | ||
| Scan028 | Stamp from the Print Room in Derby on the reverse of a document. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 19 NOV 1928 DERBY. | ||
| Scan029 | Blueprint diagram illustrating a fracture on a lever for an axle control damper. | ||
| View original record | LEVER BROKEN <--- TO AXLE CONTROL DAMPER ARROW INDICATES POSITION OF FRACTURE STRAIGHT THROUGH AND CLOSE TO WOODRUFF KEY. | ||
| Scan030 | The reverse of a document showing a 'Print Room' archival stamp from Derby. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 19 NOV 1928 DERBY. | ||
| Scan031 | Tests carried out on the Phantom to prevent high speed wobbles by repositioning shock absorbers. | ||
| View original record | To R: from Hs/Rn. c. to B.J: Wor. c. to D.A. Oy c. to By: ORIGINAL Hs/Rnl/LG13.11.28. HIGH SPEED WOBBLES. X457 X235 We carried out tests on the Phantom to determine if shock absorbers applying load at… | ||
| Scan032 | Blueprint diagram illustrating the positioning of shock dampers to counter high-speed wobble. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 12 NOV 1928 16.0" 23.5" HIGH SPEED WOBBLE AND SHOCK DAMPER POSITION. | ||
| Scan033 | Observations on equivalent wire gauges for fuses on main and accessory distribution boards. | ||
| View original record | To E. from EFC. V. BY. BY/HD. DISTRIBUTION BOARDS Further to our EFC2/T2.11.28, with reference to double and single wire fuses for the main and accessory distribution boards respectively, with a view… | ||
| Scan034 | The S.S. Starter Motor, detailing gear ratio, motor windings and the armature taper for engagement. | ||
| View original record | To R. from EFC. c. PJ. E. Da. c. Wor. Ex. EFC4/T16.11.28. ORIGINAL S.S. STARTER MOTOR. X7625/5513 The gear ratio on EAC.7 is the previous 13 : 1 ratio. MOTOR. We have taken great care to get in all… | ||
| Scan035 | Continued note on changing gear teeth from 5 degree helical to parallel. | ||
| View original record | Contd. -2- EFC4/T16.11.28. -------------- and did not seem to be increased by making of main contact. We are also returning to parallel teeth in place of 5° helical, with the idea that perhaps it is… | ||
| Scan036 | Tests on an 'SS' Axle Control Damper, specifically the function and placement of the air vent. | ||
| View original record | To R. from Hs/Bn. c.c. to B.J. Wor. c.c. to E. DA. c.c. to BY. ORIGINAL Hs/Bn2/LG17. 11. 28. X7420 X7520 'SS' AXLE CONTROL DAMPER TO H.SCH. 2635 From our tests so far there does not seem to be any… | ||
| Scan037 | Failures in petrol supply and proposing modifications to address issues with filters and exhaust heat. | ||
| View original record | To R: from Hs. c. to BJ. Wor.✓ c. to E. DA. c. to OY. BY. ORIGINAL Hs1/LG1 7.11.28. FAILURES OF PETROL SUPPLY. X8510/X3200 It will be necessary for us to make the proposed modification at once as the… | ||
| Scan038 | Investigation into a petrol supply failure on the Phantom model caused by petrol gassing from engine heat. | ||
| View original record | To R. from Hs/GWH. c. to BJ. Wor. c. to E. DA. c. to OY. BY. Hs/GWH/LG16.11.28. PHANTOM - FAILURE OF PETROL SUPPLY. We have, since fitting the Zenith and Enots petrol filters in conjunction with the… | ||
| Scan039 | Resolving fuel supply issues related to air locks and pressure in the autovac system. | ||
| View original record | contd :- -2- forming and under extreme conditions it has functioned perfectly. In addition to overcoming this trouble it has the advantage of overcoming another. We have found that when the filter… | ||
| Scan040 | Table of starter motor static torque data and curves of static torque and calculated flux. | ||
| View original record | To R. from EFC. c. BJ. E. c. BY+ ORIGINAL EFC3/T20.11.28. SEQUENCE STARTER MOTOR TORQUE & FLUX. X7625B As referred to in our EFC4/T28.11.28, please now receive - (1) Table of starter motor static… | ||
| Scan041 | Comparison of four different starter motors and their performance characteristics. | ||
| View original record | -2- Contd. The four machines for which the results are given are as follows :- (1) The R.R. standard 6" dia. motor with 90 armature conductors. (2) One of the No.1 type 5" dia. sequence starter motors… | ||
| Scan042 | Table of static torque data for various starter motors. | ||
| View original record | STARTER MOTOR STATIC TORQUE DATA. MOTOR. | Carcass dia. (") | Armature Dia. (") | Armature Length (") | No. of conductors. | No. of field turns per pole. | Torque for 120 amperes (ln-inches) |… | ||
| Scan043 | Progress report on the completion of the first 'SS' chassis and plans for a second engine unit and a bump chassis. | ||
| View original record | To R. from Hs. c: to BJ. Wor. c: to E. DA. c: to BY. ORIGINAL 'SS' CHASSIS. X7770 X7250 We have completed the first SS' chassis. We are all very pleased with its appearance. The radiator being lower… | ||
| Scan044 | Modifications to the 'SS' rear axle damper for improved accessibility and to assist with springing complaints. | ||
| View original record | To R. from Hs/Rn. c.c. to BJ. Wor. c.c. to E. DA. c.c. to BY. OY. 'SS' REAR AXLE DAMPER. X7350 X-7060 We have initially adopted the position of the SS. rear damper in the frame to N.sch.2652 as this… | ||
| Scan045 | Proposing modifications to the 'SS' Rear Axle Damper to allow for easier adjustment without detaching it from the frame. | ||
| View original record | To R. from Hs/Rm. c.c. to BJ. Wor. c.c. to DA. E. c.c. to BY. ORIGINAL Hs/Rm4/LG22.11.28! 'SS' REAR AXLE DAMPER. X7350 We have adopted the position shewn in N.sch. 2652 for this damper, as it makes a… | ||
| Scan046 | Road test report on an 'SS' chassis, comparing its performance against the Phantom model. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to E. DA. c. to BY. ORIGINAL 'SS' CHASSIS. X7770 X8840 X7840 X200 We have run this chassis on the road and the general impression is very pleasing. The silence of the… | ||
| Scan047 | Comparison of chassis weights for the Standard 40/50 'V' series and the 'SS' chassis. | ||
| View original record | CHASSIS WEIGHTS. Standard 40/50 'V' series. Weight of chassis - long type - including :- LBS. Battery. 100 Battery box. 16 Oil. 25 Water. 80 Petrol 18 galls. 135 Tyres - 4 528 Wt. of chassis with… | ||
| Scan048 | The seizure of a vacuum pump cam wheel eccentric, discussing clearances and solutions. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor. c. to E. DA. c. to BY. ORIGINAL Hs/ACL1/LG23.11.28. 'SS' VACUUM PUMP - CAM WHEEL ECCENTRIC. X7520 We have had a case of seizure of the vacuum pump conn. rod bearing… | ||
| Scan049 | Suggestion for adjusting the clearance on an SS engine between the eccentric and connecting rod to improve lubrication. | ||
| View original record | contd :- -2- get between the eccentric and conn. rod if ample clearance is provided. Signs of tightness on these parts were noted on the first SS. engine but no trouble was experienced after they had… | ||
| Scan050 | Fixing a thump in the 'SS' starter motor for the 9-EX car. | ||
| View original record | To R. from Hs/GWH. ORIGINAL Hs/GWH/LG23.11.28. c.c. to B.J. Wor. c.c. to E. DA. c.c. to BY. 'SS' STARTER MOTOR. (9-EX CAR). X76258 We have been able to stop the thump upon engaging, by fitting a… | ||
| Scan051 | Schematic for a starter motor knock damper. | ||
| View original record | 9 E.X. STARTER MOTOR. KNOCK DAMPER. D.71714 SPRING OILED LEATHER CUP. THIS SCHEME DAMPS OUT ALL ENGAGEMENT KNOCK & 50% DISENGAGEMENT KNOCK. GHRakliffe 13/11/28. | ||
| Scan052 | Page marked with a 'Print Room' stamp from Derby. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 24 NOV 1928 DERBY. | ||
| Scan053 | Delivery delay of silent tread tyres for 19' rims due to faulty moulds from Dunlops. | ||
| View original record | To R. From Hs/Rn. c. to B.J. Wor. c. to K. DA. C. to BY. ORIGINAL Hs/Rn2/LG24.11.28. X5820 X4050 20 HP. SILENT TREAD TYRES FOR 19" RIMS. We have just heard from Messrs. Dunlops that the moulds they… | ||
| Scan054 | Delay in fitting a Barker body to chassis 18-EX due to incorrect dimensions from the coachbuilder. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to DA. E. c. to BY. ORIGINAL Hsl/LG26.11.28. 'SS' CAR. X7770 X1698 It is going to take us longer than we anticipated to fit the Barker body to chassis 18-EX owing to… | ||
| Scan055 | Calculations for a lengthened armature sequence starter motor. | ||
| View original record | To R. from EFC. c. BJ. E. Cg BY. ORIGINAL EFCl/T28.11.28. SEQUENCE STARTER MOTOR Attached hereto we now send you (R. and By.) copy of our calculations in connection with the lengthened armature… | ||
| Scan056 | Calculations for a lengthened armature type sequence starter motor with a 16:1 ratio. | ||
| View original record | SV EFCL/T27.11.28. ---------------- SEQUENCE STARTER MOTOR. LENGTHENED ARMATURE TYPE FOR 16 : 1 RATIO. This motor is calculated below on the basis of an engine speed of 40 and a motor speed of 640… | ||
| Scan057 | Page of calculations for motor armature specifications and performance, including flux density, dimensions, and back E.M.F. | ||
| View original record | -2- Contd. Assume for the condition of the motor taken as the basis of these calculations useful polar flux density of 6450lines per cm^2 reckoned on the minimum pole face. Armature diameter… | ||
| Scan058 | Page of calculations for motor resistance, including armature, field, and brush resistances. | ||
| View original record | -3- Contd. Forward terminal P.D. = 8.40 volts. Hence E.M.F. to overcome ohmic resistance = 4.62 volts Amperes = 180. Total motor ohms = .0256 = R Let field resistance = RF and armature " = RA Then R =… | ||
| Scan059 | Engineering calculations for armature and conductor dimensions, including space efficiency and pitch of teeth. | ||
| View original record | -4- Contd. Whence a = .00815 / 1.00 = .00815 sq.ins. Allowing 37% space efficiency in slots, slot area = 2 x .00815 / .37 = .0044 sq.ins (say) Take slot depth = .390" Then slot width = .112" Width of… | ||
| Scan060 | Calculation table for the ampere-turns required to produce a specific magnetic flux. | ||
| View original record | 4a- AMPERE TURNS NECESSARY TO PRODUCE FLUX REQUIRED | Part. | Mat'l. | Length (") | Virtual section (sq. ins) | Total flux. | Flux density Inch units. | Flux density Cm. units. | H. | A.T. per inch. |… | ||
| Scan061 | Calculations for motor field winding, including ampere turns, resistance, and cross-sectional area. | ||
| View original record | -5- Contd. Estimated ampere turns required = 353. This does not take into account armature reaction effect which may perhaps be considered to increase the necessary field ampere turns 50%. This would… | ||
| Scan062 | Page discussing motor resistance, supply voltage, torque, and brake test performance. | ||
| View original record | -6- rather more than the imaginary resistance of .020 ohm in series with the 12 volt supply. It appears generally that the motor as now arranged is comparatively easy and that we ought to realise good… | ||
| Scan063 | Dangerous alteration of the EAC.10 distribution board's main battery fuse from a screw-in to a clip-in type. | ||
| View original record | To R. From EFC. c. E. RJ. HY. B/LAD ORIGINAL EP03/130.11.28. X7740 X2515 EAC.10 DISTRIBUTION BOARD On the new EAC.10 distribution board the main battery or emergency fuse has been altered from the… | ||
| Scan064 | Potential dangers of a proposed change to the main fuse arrangement and recommending the original design be retained. | ||
| View original record | -2- Contd. a distribution fuse holder can be put in the main fuse clips in which case there is then a fuse of only 30 amperes capacity. We consider that in making this change we have given an… | ||
| Scan065 | Explaining an electrical fault causing the green lamp on the S.S. distribution board to remain on. | ||
| View original record | To R. from EFC. c. BJ. BY. ORIGINAL EFC4/T3.12.28. x4060 x9740 S.S. DISTRIBUTION BOARD GREEN LAMP SWITCH. We have arrived at a point in connection with the above that has previously been overlooked,… | ||
| Scan066 | Persistent problems and experiments related to front road spring squeaks and lubrication. | ||
| View original record | To R. from Hs/Rm. c.c. to BJ. Wor. c.c. to DA. BY. c.c. to OY. ORIGINAL FRONT ROAD SPRINGS. 17410 48410 One of our most persistent troubles is spring squeaks. The main source of this complaint is the… | ||
| Scan067 | Diagram illustrating the lubrication method for a flexible cable spring. | ||
| View original record | FLEXIBLE CABLE SPRING LUBRICATION. | ||
| Scan068 | Secret report on the improved riding comfort of the 18-EX 'SS' Phantom after a 450-mile test run. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to E. DA. c. to BY. ORIGINAL SECRET. 18-EX. 'SS'. +7770 Hs1/LG5.12.28. We have just had a run to WW. and back on the 'SS' with incidental runs the mileage amounts to… | ||
| Scan069 | Car's performance, noting improvements in power, weight, engine smoothness, and appearance compared to the standard Phantom. | ||
| View original record | contd :- -2- The performance of the car is better than the standard Phantom. This is due to the increase in power and to the reduction in weight. The engine smoothness is at least equal to the best… | ||
| Scan070 | Test report on the failures observed during an 'SS' Bumper Test on a bumping rig. | ||
| View original record | To R. from Hs/Rm. c.c. to BJ. Wor. c.c. to DA. E. c.c. to BY. ORIGINAL Hs/lml/LG5.12.28. 'SS' BUMPER TEST. X & 772 This chassis has so far run 24 1/2 hrs. on the bumping rig. The failures so far have… | ||
| Scan071 | Blueprint of an N.S. Axle Control Damper with handwritten notes detailing repeated component failures. | ||
| View original record | F.79314 N.S. AXLE CONTROL DAMPER BROKE HERE AFTER 6Hrs 30 MINS RUNNING 4 OF THESE HAVE BROKEN ALTOGETHER JKeatings ROYCE, LIMITED PRINT ROOM, 5 DEC 1928 | ||
| Scan072 | Sketch showing the arrangement for fixing the radiator to an S.S. Bump Chassis, noting a stud failure. | ||
| View original record | [ "ARRANGEMENT RADIATOR FIXING", "S. S. BUMP CHASSIS", "STUD E78163 FAILURE", "SKETCH SCALE 2/1 APPROX", "JGreatorex", "ROYCE LIMITED", "FIT ROOM", "5 DEC 1928", "DERBY" ], | ||
| Scan073 | Recurring seizing issues with the dynamo pinion bush lubrication on the 'SS' engine. | ||
| View original record | To R. from HS/ACL. c. to BJ. Wor. c. to E. DA. c; to BY. 'SS' ENGINE - DYNAMO PINION BUSH LUBRICATION. We have a recurrence on the second 'SS' engine of the seizing trouble through inadequate… | ||
| Scan074 | Suggestion to improve lubrication for the pinion bracket by modifying the vacuum pump cylinder's oil port. | ||
| View original record | contd :- -2- pinion bracket and therefore ensure positive lubrication of this part. We further offer the suggestion that the lubricating port in the vacuum pump cyl. could be arranged to give more oil… | ||
| Scan075 | Design changes to an S.S. Sequence Starter's main and auxiliary switch to resolve a motor run-on issue. | ||
| View original record | To R. from EFC. c. BJ. E. c. Ev. S.S. SEQUENCE STARTER. - MAIN & AUXILIARY SWITCH Unless we revert to the use of the duplex push button switch, such as was desirable in the case of the electrical… | ||
| Scan076 | Testing and potential modifications for a Green Lamp Switch, focusing on armature and field contact breaks. | ||
| View original record | To R. from KFC. c. BJ. BY. Wor. c. E. ORIGINAL EFC4/112.12.28. X4040/7740 GREEN LAMP SWITCH. again Further to our EFC3/T12.12.28, it is probable that a failing neck voltage of 12.0 would meet the case… | ||
| Scan077 | Continued discussion and recommendation regarding the procedure for breaking an armature in relation to the field. | ||
| View original record | Contd. -2- EFC4/T12.12.28. We consider that we have sufficient evidence to recommend still breaking the armature when moving away from the charge position, but breaking it in relation to the field… | ||
| Scan078 | Adjustment to the operating and fall-back voltage of a green lamp switch. | ||
| View original record | To R. from EFC. c. BJ. E. By. c. Wor. ORIGINAL EFC3/T12.12.28. GREEN LAMP SWITCH. Further to our EFC4/T3.12.28 we now think we can overcome this trouble by adjusting the green lamp switch to fall back… | ||
| Scan079 | Testing of an S.S. starter and modifications to the 9-EX starter. | ||
| View original record | To R. From EFC. c. BJ. E. c. Rv. Wor. EFC1/T12.12.28. S.S. STARTER. X7655B X7625B S.S. Yesterday afternoon we had on test on a test bed engine the most up-to-date arrangement of starter, with the… | ||
| Scan080 | Test report on a new arrangement comprising a lengthened motor, modified pinion teeth, and an interlocked switch. | ||
| View original record | To R. -2- Contd. carried Report on test of new arrangement made out yesterday afternoon. The apparatus on test comprises the following:- (1) Motor - 1st. new lengthened armature motor (3.500") with 37… | ||
| Scan081 | Motor and gear performance, detailing issues with engagement, disengagement, noise, and clearances on various systems. | ||
| View original record | -3- Contd. would not recede but appeared to require nothing more than a tap of the wooden handle of the screwdriver on the carcase to enable it to do so, showing that this fault is merely a question… | ||
| Scan082 | Analysis of a mechanical disengagement issue, discussing energy absorption, gear noise, and the necessity of a fluid friction damper. | ||
| View original record | -4- Contd. in this new case. It appears that the thump on disengagement is a mechanical problem independent of the electrical functioning of the system. Assuming that we wish to get the armature… | ||
| Scan083 | Further note describing a method for observing the functioning of gears using a hole cut in the gear case. | ||
| View original record | Contd. -5- EFCL/11.2.28. Further note. The functioning of the gears was readily observed by means of a hole that had been cut in the gear case on the underside, a pea lamp suitably supported with… | ||
| Scan084 | Information about a Rotary Displacement Pump from Stothert & Pitt Ltd. | ||
| View original record | To. E. from Hs/Rm. Hs/Rm1/LG12.12.28. X3449 We have received one or two letters from Messrs. Stothert & Pitt Ltd., about a Rotary Displacement Pump. We cannot ever remember seeing this pump or… | ||
| Scan085 | Decision to revert to a double pole push button switch and the related timing of its circuits. | ||
| View original record | To R. from EFC. u. RJ. E. c. Ev. Wor. ORIGINAL EFC2/T14.12.28. S.S. STARTER PUSH BUTTON SWITCH. X76552 We are disappointed in your decision to revert to a double pole push button switch together with… | ||
| Scan086 | Torque and flux curves for a new lengthened armature S.S. motor. | ||
| View original record | To R. from EFC. c. BJ. E. E. By. EFC3/T14.12.28. SEQUENCE STARTER MOTOR FLUX AND TORQUE. Further to our EFC3/T20.11.28, we now send you torque and flux curves for the new lengthened armature S.S.… | ||
| Scan087 | Report on the testing and potential modification of a sequence starter, with comparisons to a Bosch model. | ||
| View original record | To R. from EFC. c. PJ. E. c. By. Wor. ORIGINAL EFC/T15.12.28. X765573 X4562 SS. SEQUENCE STARTER. We have in preparation a report dealing with the various points mentioned in your R3/M11.12.28, the… | ||
| Scan088 | The suitability of using a higher-rated spring with a taper armature and the need for fluid damping. | ||
| View original record | Contd. -2- EFC/T15.12.28. It may, for instance, appear more suitable with the taper armature to use a higher rated spring as at present. Personally, I cannot see how it is possible with any… | ||
| Scan089 | Follow-up report on experiments and observations regarding corner jamming issues with the S.S. Sequence Starter. | ||
| View original record | To R. from RFC. c. RJ. E. c. Hy. Wor. S.S. SEQUENCE STARTER Our report EFC1/T15.12.28 was written rather hurriedly. We can now deal with the points a little more completely. Our experiments to date of… | ||
| Scan090 | Forces, friction, and spring requirements of a longer armature motor. | ||
| View original record | EFC1/T17.12.28. -2- Contd. Regarding the force of the spring with [handwritten: in] different positions, in this longer armature motor with the reduced armature taper, a longitudinal armature pull… | ||
| Scan091 | Analysis of spring forces, armature taper, and electrical engagement in a starting mechanism. | ||
| View original record | EFC1/T17.12.28. -3- Contd. There is also the question of the spring being capable of pulling the armature back & up an incline of 1 in 3 which, if we consider the incline to reverse when we wish to… | ||
| Scan092 | Analysis of motor engagement failure, discussing spring strength, winding gauge, and current. | ||
| View original record | EFCV/T17.12.28. -2- Contd. already explained, the first failure resulting from the use of too strong a spring is that the motor simply comes into engagement, turns the engine, and then drops out quite… | ||
| Scan093 | Experiments comparing a Bosch armature with an in-house motor, detailing operational failures and noise issues. | ||
| View original record | EFCL/T17.12.28. -5- Contd. You will remember that the Bosch armature is parallel and that the spring is a very long one with a low rating but well set up. We are comparing the relation of longitudinal… | ||
| Scan094 | Continued report on starter motor issues including various noises, motor curves, and a comparison with Bosch starters. | ||
| View original record | EFC1/T17.12.28. -6- Contd. (2) Gear Noise when rolling engine. (3) Gear scream when engine drives motor previous to disengagement. (4) Thump on disengagement. As stated, we will at the first… | ||
| Scan095 | Analysis of starter motor gear ratios and spring mechanisms, comparing with a Bosch design. | ||
| View original record | EFC1/T17.12.28. -7- Contd. in much the same way as our own. At the moment we feel that the problem on our own starter is somewhat different, partly on account of the gear ratio which is probably… | ||
| Scan096 | Secret memo outlining the plan for testing and swapping experimental 'SS' cars in France. | ||
| View original record | To R. from Hs. c.c. to BJ. Wor. c.c. to RG. E. c.c. to DA. BY. ORIGINAL Hs2/LG19.12.28. X7770 X7941 SECRET. 'SS' CARS. We are very anxious that you shall have a 'SS' car at Le Canadel as soon as… | ||
| Scan097 | Reporting the successful completion of 60 hours of bumping tests on the 'SS' chassis with no failures. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to E. DA. c. to BY. ORIGINAL Hs3/LG19.12.28. 'SS' BUMPING TESTS. Y8772 We have completed 60 hrs. bumping on the rear of the SS. chassis fitted with spare wheels and… | ||
| Scan098 | Fault investigation into the reversal of dynamo polarity causing cutout points to stick. | ||
| View original record | To R. from EFC. c. BJ. E. c. EW. Wor. EFC2/T19.12.28. XN40 X440 S.S. DISTRIBUTION BOARD GREEN LAMP SWITCH. Further to our EFC4/T3.12.28, EFC3/T12.12.28 EFC4/T12.12.28 and your R/M11.12.28; another… | ||
| Scan099 | Continued analysis of a dynamo and switchbox circuit arrangement. | ||
| View original record | -2- Contd. broke connection with the battery after or before C. N.B. If it broke before C, the green lamp coil current would pass through the dynamo field in the right direction. From the point of… | ||
| Scan100 | Troubleshooting of a high voltage fault related to a green lamp circuit and switchbox. | ||
| View original record | -3- Contd. high voltage exists from B to earth across the green lamp coils, which will cause the green lamp to be lighted and call for switching off though there is nothing to indicate that the green… | ||
| Scan101 | Secret memo reporting on the mileage testing of the 18-EX experimental car. | ||
| View original record | To H. From Hs. c.c. to BJ. c.c. to E. c.c. to BY. ORIGINAL Hs4/LG20.12.23. S E C R E T. 10,000 MILES ON 18-EX CAR. (X7941) We have received information by wire that 18-EX car has completed 1500% miles… | ||
| Scan102 | Secret memo reporting on a 2300-mile test of the 'SS' car, discussing starter motor adjustments and a clutch fault investigation. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to E. DA. c. to BY. ORIGINAL. SECRET. 10,000 MILES ON 'SS'. X7941 (crossed out) X7620 X7300. We have had a telegram to say that they have completed 2300 miles on the… | ||
| Scan103 | Modifications and experimental variations to an S.S. Sequence Starter to improve engagement. | ||
| View original record | To R. from EFC. c. BJ. E. c. BY. Wor. ORIGINAL EFC1/T22.12.28. S.S. SEQUENCE STARTER. x7685 We do not now have the trouble of not returning from a corner jam. In regard to failure to engage on first… | ||
| Scan104 | Modifications and testing of a motor's engagement mechanism, spring rating, and air damper. | ||
| View original record | EFC1/T22.12.28. -2- Contd. If, therefore, we apply the main current earlier it would appear that we could use a rather lower rated spring and still have little engaging end thump, but at the same time… | ||
| Scan105 | The issues encountered during a 10,000-mile test in France, after the first 5,000 miles. | ||
| View original record | To R. from Hs. c. to BJ. W.H. c. to E.E. B.M. c. to BY. ORIGINAL Hs4/LG27.12.28. 'SS' 10,000 MILES TEST IN FRANCE. X7941 We have heard from Mr. Hancock that the car has completed 5000 miles and is now… | ||
| Scan106 | The delivery of a 20 HP car (14-G-4) to France, its new engine, and a persistent oscillation problem. | ||
| View original record | To R. from Hs. C. to P.J. Wor. C. to R. E.A. C. to D.Y. OR ORIGINAL Hs5/LG27.12.28. 20 HP. X5841 X5770 The 20 HP. 14-G-4 left Derby today and will arrive in France tomorrow. Hs/Rm. is going with the… | ||
| Scan107 | Recommendation against fitting an experimental green lamp battery indicator to the 'SS' car, advocating for existing standard equipment. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to E. DA. c. to BY. EFC.✓ ORIGINAL HS3/LG27.12.28. 'SS' GENERALLY. X 4040 You have already expressed agreement that anything experimental should be left off the SS.… | ||
| Scan108 | Recommendation to continue testing an experimental green lamp scheme and use the present Phantom electrical arrangement. | ||
| View original record | contd :- -2- that the green lamp scheme should be continued to be tested as an experimental improvement, and that the first cars should have the present Phantom arrangement of generator, switchbox and… | ||
| Scan109 | Design of a fluid damper for the S.S. starter motor armature, referencing an attached sketch of a Bosch grease damper. | ||
| View original record | To E. from EFC. ORIGINAL EFC2/T29.12.28. S.S. STARTER MOTOR. x7625 x4562 In connection with the design of the fluid damper for the longitudinal motion of the motor armature please find attached a… | ||
| Scan110 | Progress of 10,000-mile car tests in France, including car adjustments and personnel movements. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to E. DA. c. to BY. ORIGINAL Hs3/LG29.12.28. X7941 X5941 10,000 MILES TEST ON 'SS' IN FRANCE. We have heard by telegram that the car in France has completed 6100 miles… | ||
| Scan111 | Investigation into a green lamp switch that has a mysteriously reduced operating voltage. | ||
| View original record | To R. from EFC. c. BJ. Wor. c. E. Da. c. By. EFCl/T29.12.28 GREEN LAMP SWITCH. X.4040. Referring to the third para. of Hs3/LG27.12.28, of the "two occasions" referred to, only one of these appears to… | ||
| Scan112 | Modifications to the S.S. Sequence Starter, discussing issues with non-taper armatures and performance of chassis 19-EX. | ||
| View original record | To R. from EFC. c. RJ. E. Sg. c. HY. Ds. c. Wor. CWP. S.S. SEQUENCE STARTER EPC2/T31.12.28. RL/M21.12.28. X7 625/SS With the various modifications which we have made. e.g. (1) Suitably altered… | ||
| Scan113 | Longitudinal pull and friction, discussing armature design, magnetic flux, and potential improvements with new brushes and dampers. | ||
| View original record | -2- Contd. as we now have on the S.S. chassis. As previously reported we have not experienced any insufficiency of longitudinal pull to start engagement in cases where mechanical friction is… | ||
| Scan114 | Engine roughness at high speeds in the 20 HP and 40/50 HP models, recommending testing a balanced crankshaft. | ||
| View original record | To R. from Hs. c. to B.J. WOR. c. to E. DA. c. to BY. ORIGINAL Hs5/LG15.11.28. ENGINE ROUGHNESS AT HIGH SPEEDS. X634 . We are not satisfied with the engine smoothness at high speed either on the 20… | ||
| Scan115 | Report suggesting the use of counter weights on car crankshafts to reduce high speed roughness and vibrations. | ||
| View original record | To R. from Hs/Tsn. c.c. to BJ. Wor. c.c. to RG. E. c.c. to BY. Hs/Tsnl/LG13.11.28. HIGH SPEED ROUGHNESS AND OVERRUN VIBRATIONS. In the following report we give our reasons for suggesting that we… | ||
| Scan116 | The possible causes of high-speed roughness and vibration in cars. | ||
| View original record | -1- POSSIBLE CAUSES. The following three are the only possible causes that we know of high speed roughness and vibration in our cars (handwritten above crossed-out 'case') : (1) Out of balance, either… | ||
| Scan117 | Engine vibration, resonance, and roughness at different speeds, with references to specific engine models. | ||
| View original record | contd :- -2- depend only on the magnitude of the unbalanced force and the weight or inertia of the engine unit. The effect of mounting the engine in some more or less elastic way will be to introduce… | ||
| Scan118 | Engine torsional periods and the distortion of moving parts at high speeds. | ||
| View original record | contd :- -3- However on other cars we find that the main torsional period when reached is very much more sudden and sharply defined. We have noticed recently on two cars with smooth engines that we… | ||
| Scan119 | Engine vibration, distortion balance, and potential solutions like using counter-weights. | ||
| View original record | contd :- -4- It is possible for this force, acting on the engine parts, to alternate between plus and minus nearly 2 tons. None of our materials of construction, being elastic, are capable of… | ||
| Scan120 | Crankcase design, materials, and their effects on engine vibration. | ||
| View original record | contd :- -5- make a single crank in two short bearings turn safely up to 7000 r.p.m. On some cars only a few counter weights are used, on those journals where the loads are likely to be high due to… | ||
| Scan121 | Reducing high-speed engine roughness by comparing added counterweights against a stiffer crankcase. | ||
| View original record | contd :- -6- upper one cannot be fixed with definite certainty on a test bed. We are led to conclude that the improved smoothness lies in the stiffer support to the bearings on 1-G-1 engine, in which… | ||
| Scan122 | Comparison of crankshaft and engine designs, including those of Chrysler, Stutz, and Alfa-Romeo. | ||
| View original record | contd :- -7- counter weights as to be independent of bearing support for its truth of running at high speeds. We prefer this to the American scheme of putting the weight into a cast iron crankcase. We… | ||
| Scan123 | Engine vibration, with a quote on crankcase vibrations, and the arrangement of counterweights on crankshafts. | ||
| View original record | contd :- -8- We ran through the main period once, when the engine was again smooth. This top period was not serious, and we believe could have been damped out. With a S/C. and increased engine torque… | ||
| Scan124 | Competitor crankshaft balancing methods followed by details of vibration experiments conducted on a 20 HP engine. | ||
| View original record | contd :- -9- The Packard, in which the crankshaft appears to be not a forging, but machined all over, is indication of the lengths to which they are prepared to go. The Packard and the Chrysler use… | ||
| Scan125 | Page 10 of a report analyzing engine vibration characteristics and testing results. | ||
| View original record | contd :- -10- wheel case gears were left untouched. We noticed that the engine vibration from 30/40 m.p.h. in 3rd. gear was about 80% less than when pistons and rods were fitted. At 41 m.p.h. (2960… | ||
| Scan126 | Analysis of crankshaft vibration and distortion, with a suggested new design for a 20 HP engine. | ||
| View original record | contd :- -11- the shaft, and thus affected by the presence or absence of the blocks. Owing to the nature of the vibration as observed we are inclined to put it down to distortion, as the sole… | ||
| Scan127 | Typed memorandum discussing crankshaft design, including pin lengths, disc-web shafts, and comparisons to racing engines. | ||
| View original record | contd :- -12- We think we can increase the lengths of the pins very considerably at the expense of the webs, as shewn, provided the latter are made really wide. Disc-web shafts sometimes have very… | ||
| Scan128 | Diagram showing the inertia loads on a 20 HP engine crankshaft at 3500 R.P.M. | ||
| View original record | 20 HP - INERTIA LOADS ON CRANKSHAFT SCALE - 1" - 1000 LBS 3500 R.P.M. FIG I CRANK ANGLE 0, 20°, 40°, 60°, 80°, 100°, 120°, 140°, 160°, 180°, 200°, 220°, 240°, 260°, 280°, 300°, 320°, 340° 4357 LBS… | ||
| Scan129 | Blank page stamped by the Print Room in Derby. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 13 NOV. 1928 DERBY. | ||
| Scan130 | Diagrams showing types of counterweights employed in some cars. | ||
| View original record | FIG. 3. TYPES OF COUNTERWEIGHTS EMPLOYED IN SOME CARS. STR:8 ISOTTA. STR. 8. PACKARD. 18 HP. 6 CYL. DELAGE 40-50HP 6 CYL. DELAGE 6 CYL. DE SOTO. LIMITED PRINT ROOM, 13 NOV 1928 DERBY. Tsm. 6/11/28. | ||
| Scan131 | Diagrams illustrating crankshaft counterweight arrangements for various engines. | ||
| View original record | FIG 2. ARRANGEMENTS OF COUNTERWEIGHTS IN SOME ENGINES STR. 8. PACKARD 9 BEARINGS 6 CYL CHRYSLER 7 BEARINGS 6 CYL. DE SOTO 4 BEARINGS 6 CYL. A.C. 4 BEARINGS 6 CYL FRANKLIN 7 BEARINGS 6 CYL 20 H.P.… | ||
| Scan132 | Blueprint with notes on the design and benefits of a counterweighted crankshaft for a 20 HP engine. | ||
| View original record | C.B/3 COUNTERWEIGHTED CRANKSHAFT · FOR 20 HP ENGINE. Fig 4 WHICH SHOULD GIVE: 1) GREATER SMOOTHNESS AT HIGH R.P.M. DUE TO TOTAL BALANCE OF ALL ROTATING WT. I.E. BIG-END, PIN, & WEBS, & THUS NEGLIGIBLE… | ||