Rolls-Royce Archives
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
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DescriptionDateIdentifier
Design to silence noise in the Phantom 2's exhaust heated induction pipe.27th Nov 1929West Wittering \ T \ March1929-December1929  Scan281
Confirming experimental modifications to the Phantom II brake operating gear.29th Nov 1929West Wittering \ T \ March1929-December1929  Scan282
Two alternative proposals for wider rear foot brake shoes on the Phantom II.29th Nov 1929West Wittering \ T \ March1929-December1929  Scan283
Design schemes and alternatives for the Phantom II exhaust heated throttle.29th Nov 1929West Wittering \ T \ March1929-December1929  Scan284
Inquiry requesting a report on the nature of troubles with shock dampers, specifically knocking and wear.29th Nov 1929West Wittering \ T \ March1929-December1929  Scan285
Suggestions for the 20HP Hypoid Axle, specifically concerning the pinion thrust bearing nut and comparison to the Phantom II.2nd Dec 1929West Wittering \ T \ March1929-December1929  Scan286
Proposal for a hydraulic test rig for connecting rods and other components requiring alternate stress testing.2nd Dec 1929West Wittering \ T \ March1929-December1929  Scan287
Alternative design for a Phantom II exhaust-heated carburettor uptake using a fishtail inlet to dampen noise.3rd Dec 1929West Wittering \ T \ March1929-December1929  Scan288
Modifications to a subframe for a Park Ward Twenty to accommodate a hypoid axle.12th Mar 1929West Wittering \ T \ March1929-December1929  Scan289
Car dynamo output and potential solutions for undercharged batteries in winter.3rd Dec 1929West Wittering \ T \ March1929-December1929  Scan290
Proposal outlining improvements for carburettors, suggesting a hybrid design.3rd Dec 1929West Wittering \ T \ March1929-December1929  Scan291
Features and advantages of a specific carburetter design.4th Dec 1929West Wittering \ T \ March1929-December1929  Scan292
Modifications for chromium plating radiators, including material choice and tank design.4th Dec 1929West Wittering \ T \ March1929-December1929  Scan293
The development of a new expanding fixed throat carburetter based on a recent patent.4th Dec 1929West Wittering \ T \ March1929-December1929  Scan294
On shock damper design, discussing schemes for controllable damping based on stroke length and vehicle speed.12th Apr 1929West Wittering \ T \ March1929-December1929  Scan295
Following up on an arrangement to receive a Powerplus Blower for Mr. Royce's inspection.5th Dec 1929West Wittering \ T \ March1929-December1929  Scan296
Design schemes for the Phantom II and 20HP rear shock dampers.5th Dec 1929West Wittering \ T \ March1929-December1929  Scan297
Application and clearance of the screwed backing nut on the Phantom II hypoid axle.5th Dec 1929West Wittering \ T \ March1929-December1929  Scan298
Experimental spring connecting rod for 20HP rear shock dampers, noting a ground clearance issue.7th Dec 1929West Wittering \ T \ March1929-December1929  Scan299
Modifications to the Phantom II rear springs, including shackles, packing plates and clips.7th Dec 1929West Wittering \ T \ March1929-December1929  Scan300
Proposed new features and testing for an experimental Phantom II enclosed limousine.7th Dec 1929West Wittering \ T \ March1929-December1929  Scan301
Scheme 2993 for a revised Phantom II subframe, combining straight and dropped types.1st Dec 1929West Wittering \ T \ March1929-December1929  Scan302
Investigation into carrying the 20HP battery in a Dagenite moulded case with a transverse cell arrangement.10th Dec 1929West Wittering \ T \ March1929-December1929  Scan303
Various issues and recommendations concerning Phantom II subframes.10th Dec 1929West Wittering \ T \ March1929-December1929  Scan304
Subframe design modifications for coachbuilders, referencing templates and a new universal subframe.2nd Dec 1930West Wittering \ T \ March1929-December1929  Scan305
Modifications to rear wheel carriers to accommodate larger 7-inch section tyres and the resulting impact on coachwork.10th Dec 1929West Wittering \ T \ March1929-December1929  Scan306
Correct brake drum clearance specifications for the Phantom II model.13th Dec 1929West Wittering \ T \ March1929-December1929  Scan307
Suggestions and issues related to shock damper design, including valve oscillation and air trapping.13th Dec 1929West Wittering \ T \ March1929-December1929  Scan308
Suggesting an experiment with rubber mountings on a 20HP model.14th Dec 1929West Wittering \ T \ March1929-December1929  Scan309
Rubber engine suspension for the 20HP model and future engine mounting strategies.16th Dec 1929West Wittering \ T \ March1929-December1929  Scan310
Challenges of car battery charging, comparing the Lucas system with a vibrator control system used by Fiat.21th Dec 1929West Wittering \ T \ March1929-December1929  Scan311
Design, materials, and silencer for the Phantom II exhaust heated induction pipe.21th Dec 1929West Wittering \ T \ March1929-December1929  Scan312
Investigation comparing the noise levels of spur, epicyclic, and internal (spool) gears for a silent 3rd speed gearbox.24th Dec 1929West Wittering \ T \ March1929-December1929  Scan313
Battery charging issues and proposed modifications to the Lucas dynamo system for winter driving.24th Dec 1929West Wittering \ T \ March1929-December1929  Scan314
Suggestion to use four instead of three conductors from the dynamo to better regulate battery charging.24th Dec 1929West Wittering \ T \ March1929-December1929  Scan315
Scheme for adapting a standard radiator for chromium plating.24th Dec 1929West Wittering \ T \ March1929-December1929  Scan316
Examining a Powerplus blower, suggesting design improvements, and showing its performance graph.24th Dec 1929West Wittering \ T \ March1929-December1929  Scan317
3-litre compression ignition unit's specifications and suitability for a Phantom engine.28th Dec 1929West Wittering \ T \ March1929-December1929  Scan318
Move towards an intermediate output dynamo and the need for a simple, reliable charge indicator.28th Dec 1929West Wittering \ T \ March1929-December1929  Scan319
Arranging a schedule of monthly visits to Derby.31th Dec 1929West Wittering \ T \ March1929-December1929  Scan320
Progress on a rear light switch, starting handle positioning, and bumper standardization inquiries.31th Dec 1929West Wittering \ T \ March1929-December1929  Scan321
Electrical system's requirements for high-current accessories like cigar lighters.2nd Nov 1928West Wittering \ T \ November1928  Scan001
Discussions with Dunlop to develop a new, safer tyre with a broader and deeper non-skid tread.2nd Nov 1928West Wittering \ T \ November1928  Scan002
Testing experimental rubber mixings for engine mountings on the 40/50 model.2nd Nov 1928West Wittering \ T \ November1928  Scan003
Tests comparing the heating of ignition coils in different positions on 20 HP and 40/50 chassis.2nd Nov 1928West Wittering \ T \ November1928  Scan004
Temperature tests on an ignition coil for different chassis models.2nd Nov 1928West Wittering \ T \ November1928  Scan005
Grading and sizing of fuse wire for main and accessory electrical distribution boards.2nd Nov 1928West Wittering \ T \ November1928  Scan006
The design challenges and experimental testing of a No. 2B starter motor and gear scheme.18th Nov 1928West Wittering \ T \ November1928  Scan007
Modifications to the SS motor, including ratio changes, armature length, and engagement issues.8th Nov 1928West Wittering \ T \ November1928  Scan008
The 'SS' starter motor, criticising its lack of reserve power compared to the existing reliable Phantom unit.3rd Nov 1928West Wittering \ T \ November1928  Scan009
The excessive wear of a pinion and issues with the starter gears on car 14-EX.1st Nov 1928West Wittering \ T \ November1928  Scan010
Preliminary test report on the expanding throat carburetter fitted to the 'SS' engine.1st Nov 1928West Wittering \ T \ November1928  Scan011
Analysis of engine performance relating to choke area, carburetter restrictors, and induction pipe depression.1st Nov 1928West Wittering \ T \ November1928  Scan012
Preliminary carburettor tests, discussing performance and recommending a modified Phantom type carburettor for the first 'SS' engines.8th Nov 1928West Wittering \ T \ November1928  Scan013
Performance graph comparing an expanding throat carburettor against standard and Claudel-Hobson carburettors for engine S5-3.8th Nov 1928West Wittering \ T \ November1928  Scan014
Page with a purple stamp from the Print Room in Derby.8th Nov 1928West Wittering \ T \ November1928  Scan015
Groove wear found on S.S. engine tappet pads after 50 hours of testing and a proposal for design improvement.9th Nov 1928West Wittering \ T \ November1928  Scan016
Technical memo recommending against changing the connecting rods and discussing crankshaft lubrication for the 'SS' engine.9th Nov 1928West Wittering \ T \ November1928  Scan017
Crankshaft oiling schemes for the Phantom and 'SS' models, recommending sticking with the current Phantom system and continuing experimental investigations.13th Nov 1928West Wittering \ T \ November1928  Scan018
Advantages of body subframes, including noise reduction and ease of fitting the body to the chassis.13th Nov 1928West Wittering \ T \ November1928  Scan019
Special visit to test the method of carrying a car body on a separate underframe.30th Oct 1924West Wittering \ T \ November1928  Scan020
Report discussing a vehicle's swaying characteristics and a criticized design scheme.3rd Nov 1928West Wittering \ T \ November1928  Scan021
The road test and characteristics of a 1.5 litre Alfa Romeo with a 4-seater fabric body.3rd Nov 1928West Wittering \ T \ November1928  Scan022
Engine smoothness and power characteristics, detailing vibration periods and torque.3rd Nov 1928West Wittering \ T \ November1928  Scan023
Vehicle test report page detailing performance characteristics, issues, and comparisons with other vehicles.3rd Nov 1928West Wittering \ T \ November1928  Scan024
Client's comparison between the 20 HP, a supercharged Alfa Romeo, and the Phantom.13th Nov 1928West Wittering \ T \ November1928  Scan025
Failures of front axle control damper levers during testing, attributing it to increased rigidity and proposing to strengthen the parts.13th Nov 1928West Wittering \ T \ November1928  Scan026
Sketch illustrating a component fracture.19th Nov 1928West Wittering \ T \ November1928  Scan027
Stamp from the Print Room in Derby on the reverse of a document.19th Nov 1928West Wittering \ T \ November1928  Scan028
Blueprint diagram illustrating a fracture on a lever for an axle control damper.19th Nov 1928West Wittering \ T \ November1928  Scan029
The reverse of a document showing a 'Print Room' archival stamp from Derby.19th Nov 1928West Wittering \ T \ November1928  Scan030
Tests carried out on the Phantom to prevent high speed wobbles by repositioning shock absorbers.13th Nov 1928West Wittering \ T \ November1928  Scan031
Blueprint diagram illustrating the positioning of shock dampers to counter high-speed wobble.12th Nov 1928West Wittering \ T \ November1928  Scan032
Observations on equivalent wire gauges for fuses on main and accessory distribution boards.16th Nov 1928West Wittering \ T \ November1928  Scan033
The S.S. Starter Motor, detailing gear ratio, motor windings and the armature taper for engagement.16th Nov 1928West Wittering \ T \ November1928  Scan034
Continued note on changing gear teeth from 5 degree helical to parallel.16th Nov 1928West Wittering \ T \ November1928  Scan035
Tests on an 'SS' Axle Control Damper, specifically the function and placement of the air vent.11th Nov 1928West Wittering \ T \ November1928  Scan036
Failures in petrol supply and proposing modifications to address issues with filters and exhaust heat.7th Nov 1928West Wittering \ T \ November1928  Scan037
Investigation into a petrol supply failure on the Phantom model caused by petrol gassing from engine heat.16th Nov 1928West Wittering \ T \ November1928  Scan038
Resolving fuel supply issues related to air locks and pressure in the autovac system.20th Nov 1928West Wittering \ T \ November1928  Scan039
Table of starter motor static torque data and curves of static torque and calculated flux.20th Nov 1928West Wittering \ T \ November1928  Scan040
Comparison of four different starter motors and their performance characteristics.20th Nov 1928West Wittering \ T \ November1928  Scan041
Table of static torque data for various starter motors.20th Nov 1928West Wittering \ T \ November1928  Scan042
Progress report on the completion of the first 'SS' chassis and plans for a second engine unit and a bump chassis.20th Nov 1928West Wittering \ T \ November1928  Scan043
Modifications to the 'SS' rear axle damper for improved accessibility and to assist with springing complaints.21th Nov 1928West Wittering \ T \ November1928  Scan044
Proposing modifications to the 'SS' Rear Axle Damper to allow for easier adjustment without detaching it from the frame.1st Nov 1928West Wittering \ T \ November1928  Scan045
Road test report on an 'SS' chassis, comparing its performance against the Phantom model.23th Nov 1928West Wittering \ T \ November1928  Scan046
Comparison of chassis weights for the Standard 40/50 'V' series and the 'SS' chassis.23th Nov 1928West Wittering \ T \ November1928  Scan047
The seizure of a vacuum pump cam wheel eccentric, discussing clearances and solutions.23th Nov 1928West Wittering \ T \ November1928  Scan048
Suggestion for adjusting the clearance on an SS engine between the eccentric and connecting rod to improve lubrication.23th Nov 1928West Wittering \ T \ November1928  Scan049
Fixing a thump in the 'SS' starter motor for the 9-EX car.23th Nov 1928West Wittering \ T \ November1928  Scan050
Schematic for a starter motor knock damper.13th Nov 1928West Wittering \ T \ November1928  Scan051
Page marked with a 'Print Room' stamp from Derby.24th Nov 1928West Wittering \ T \ November1928  Scan052
Delivery delay of silent tread tyres for 19' rims due to faulty moulds from Dunlops.24th Nov 1928West Wittering \ T \ November1928  Scan053
Delay in fitting a Barker body to chassis 18-EX due to incorrect dimensions from the coachbuilder.26th Nov 1928West Wittering \ T \ November1928  Scan054
Calculations for a lengthened armature sequence starter motor.28th Nov 1928West Wittering \ T \ November1928  Scan055
Calculations for a lengthened armature type sequence starter motor with a 16:1 ratio.27th Nov 1928West Wittering \ T \ November1928  Scan056
Page of calculations for motor armature specifications and performance, including flux density, dimensions, and back E.M.F.27th Nov 1928West Wittering \ T \ November1928  Scan057
Page of calculations for motor resistance, including armature, field, and brush resistances.27th Nov 1928West Wittering \ T \ November1928  Scan058
Engineering calculations for armature and conductor dimensions, including space efficiency and pitch of teeth.27th Nov 1928West Wittering \ T \ November1928  Scan059
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