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).
Rolls-Royce Experimental Archives                
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DescriptionDateIdentifier
Outlining engine testing, chassis modifications, and component testing for various car models.15th Mar 1929Box 65a \ 2  scan0253
Fitting of a balanced crankshaft to the 20-EX model.25th May 1921Box 65a \ 2  scan0254
Telegram requesting car 14 EX be sent to Dover, with instructions for the driver to return car 21 EX to Derby.25th May 1921Box 65a \ 2  scan0255
Outlining the recommended procedure for sending S.S. experimental chassis to the U.S.A. for testing and approval.9th Apr 1929Box 65a \ 2  scan0256
Supply of hubs and wheels from the U.S.A. and the costs of experimental tests.10th Apr 1929Box 65a \ 2  scan0257
Issues and improvements following a 10,000-mile test on the 22-EX car, including engine rattles, oil leaks, and starter motor failure.10th Apr 1929Box 65a \ 2  scan0258
Progress report on the preparation of the 21-EX and 22-EX experimental cars.18th Apr 1929Box 65a \ 2  scan0259
Requesting instructions to complete Chassis 21-EX, highlighting delays due to the silencer, undershields, and wiring.18th Apr 1929Box 65a \ 2  scan0260
Investigation into the loss of engine cooling water on the 'SS' chassis.22th Apr 1929Box 65a \ 2  scan0261
From Hs to SG arranging a meeting to test and discuss the 21-EX experimental car.25th Apr 1929Box 65a \ 2  scan0262
Requesting a status update on the 21-EX sample for the standardisation sheet.25th Apr 1929Box 65a \ 2  scan0263
Typed memo confirming a meeting at Bignalls Corner and discussing the fitting of 19 inch wheels to a Hooper car.25th Apr 1929Box 65a \ 2  scan0264
Requesting photographs of the 'SS' car for a catalogue, specifying the desired angle.29th Apr 1929Box 65a \ 2  scan0265
Photograph of a chauffeur-driven limousine parked in front of a London townhouse, No. 16.30th Apr 1929Box 65a \ 2  scan0266
Photographs of experimental cars 18-EX and 22-EX.30th Apr 1929Box 65a \ 2  scan0267
Inability to complete chassis 19-EX on time due to incomplete drawings and modifications.3rd May 1929Box 65a \ 2  scan0268
Faults with the fabric coupling and exhaust system on 'SS' cars, recommending a cautious approach to production.1st May 1929Box 65a \ 2  scan0269
Faults with the 22-EX car, including braking proportions, engine oil leaks, and starter motor failure.1st May 1929Box 65a \ 2  scan0270
Request for photographs of a completed open car, model 'S.S.' 23 EX, for potential use on trials cars.7th May 1929Box 65a \ 2  scan0271
Directive concerning the S.S. Chassis, detailing a production slowdown for the engine coupling and exhaust system.8th May 1929Box 65a \ 2  scan0272
From Sg. to Hs. regarding the trial of car 21-EX and a planned conference in Derby.8th May 1929Box 65a \ 2  scan0273
Request to issue a drawing of a spring and joint for an S.S. car undergoing a 10,000-mile test.14th May 1929Box 65a \ 2  scan0274
Letter arranging for the use and testing of experimental cars 21-EX and 19-EX during a holiday.15th May 1929Box 65a \ 2  scan0275
Letter regarding the performance of a 20 HP car and a request for an employee named Lidsey to have a week off at Whitsuntide.17th May 1929Box 65a \ 2  scan0276
Accompanying a set of blueprints for coachbuilders, including a correction for headlamp dimensions on a Phantom chassis drawing.17th May 1929Box 65a \ 2  scan0277
Inquiring about the availability of 'SS' cars at the Works for catalogue photography.24th May 1929Box 65a \ 2  scan0278
Test report on experimental car 19 EX, detailing its performance, handling, and engine characteristics.24th May 1929Box 65a \ 3  scan0001
Test report on a vehicle's performance, noting issues with brakes, engine cooling, clutch, and oil leaks.24th May 1929Box 65a \ 3  scan0002
Road test observations on various car models, focusing on cooling, vibration, and frame movement.24th May 1929Box 65a \ 3  scan0003
'jellying' issues with engine mountings and frame design on an experimental chassis.27th May 1929Box 65a \ 3  scan0004
Arranging for a photographer to photograph 'SS' cars in Derby.27th May 1929Box 65a \ 3  scan0005
Loan of 'SS' car 19-EX for testing and feedback, and addressing an overheating complaint.27th May 1929Box 65a \ 3  scan0006
Report on the cooling inefficiency of car 21-EX.27th May 1929Box 65a \ 3  scan0007
Arrangements for testing an SS car at Elstree and bringing other experimental vehicles for trials.29th May 1929Box 65a \ 3  scan0008
Telegram requesting a one-week delay in sending a car.1st Jun 1929Box 65a \ 3  scan0009
Short typed memo regarding the arrangement for a car key to be delivered to London.11th Jun 1929Box 65a \ 3  scan0010
From Sg. to Hs. regarding the deferral of sending car 21-EX for a week due to decorators at a house in Northwood.3rd Jun 1929Box 65a \ 3  scan0011
The supply of an experimental 'SS' chassis for testing under American conditions.3rd Jun 1929Box 65a \ 3  scan0012
Instructions for arranging the collection, customs, and testing equipment for an experimental car in France.4th Jun 1929Box 65a \ 3  scan0013
Suggestion to name the S.S. car 'The Silent Spectre'.5th Jun 1929Box 65a \ 3  scan0014
Outlining the handover procedure for the 21-EX car for an amateur driver test.1st Jun 1929Box 65a \ 3  scan0015
Outlining the plan to send car 21-EX for testing and subsequent transfer to France.1st Jun 1929Box 65a \ 3  scan0016
Report discussing S.S. Chassis test results and comparisons, with added points on piston seizing, water temperature, and lubrication.7th Jun 1929Box 65a \ 3  scan0017
Radiator water loss and the performance of gear changes compared to the Phantom chassis.7th Jun 1929Box 65a \ 3  scan0018
Comparison of an S.S. Car chassis against the Phantom and other experimental models.30th May 1929Box 65a \ 3  scan0019
Vehicle test report detailing performance issues and observations on a Phantom model.30th May 1929Box 65a \ 3  scan0020
Typed report detailing test observations and issues found on an S.S. model car compared to a Phantom.7th Jun 1929Box 65a \ 3  scan0021
Cover note for an attached report concerning an SS. Chassis.7th Jun 1929Box 65a \ 3  scan0022
Personal impression report comparing experimental chassis models 19-EX, 18-EX, and 23-EX.6th Jun 1929Box 65a \ 3  scan0023
Test report comparing the SS Chassis against the Phantom chassis.6th Jun 1929Box 65a \ 3  scan0024
Progress report on the status and testing of experimental cars, including several EX models.7th Jun 1929Box 65a \ 3  scan0025
Progress report on the 20 HP car tests and experimental 'R' aero engine work.7th Jun 1929Box 65a \ 3  scan0026
Progress report on the development and testing of 'H' and 'F' type aero engines, including modifications to blowers and carburettors.7th Jun 1929Box 65a \ 3  scan0027
Dropping the use of mineral oil for a test and awaiting designs for F. cylinder block modifications.11th Jun 1929Box 65a \ 3  scan0028
Internal memorandum discussing the testing strategy for the 21-EX experimental car's water temperature and overheating issues.11th Jun 1929Box 65a \ 3  scan0029
Test report and feedback on the S.S. Chassis, models 21-EX and 22-EX.12th Jun 1929Box 65a \ 3  scan0030
Comparison of issues including clutch slip, ride harshness, and engine detonation on experimental car models 19-EX, 21-EX, and 22-EX.12th Jun 1929Box 65a \ 3  scan0031
'Secret' internal memorandum outlining strict secrecy protocols for the 'SS' chassis project and modified 20 HP model.13th Jun 1929Box 65a \ 3  scan0032
Missing boiling warning light and frequent silencer popping on car 21-EX.20th Jun 1929Box 65a \ 3  scan0033
Engine noise and roughness, detailing the configuration of three S.S. chassis.20th Jun 1929Box 65a \ 3  scan0034
Continued memo on a two-branch exhaust box, steering, and the 21-EX car with a Phantom front axle.21th Jun 1929Box 65a \ 3  scan0035
Water boiling indicator lamp and exhaust popping on the 21-EX car.21th Jun 1929Box 65a \ 3  scan0036
Performance issues and improvements on experimental car chassis, including noise, speed, and steering.26th Jun 1929Box 65a \ 3  scan0037
Continued memorandum discussing a 'boom' noise in the back of a car, quoting a contradictory observation.26th Jun 1929Box 65a \ 3  scan0038
Issues and test results for experimental cars, including engine noise, speed, heat, steering, and fuel supply.26th Jun 1929Box 65a \ 3  scan0039
Continued page of a report discussing observations of a 'boom' sound in a car.25th Jun 1929Box 65a \ 3  scan0040
Comparing chassis 21-EX to a Phantom, noting improvements but also significant concerns about increased engine noise.25th Jun 1929Box 65a \ 3  scan0041
Comparative car trials, focusing on noise, performance, and improvements needed against competitor vehicles.25th Jun 1929Box 65a \ 3  scan0042
Secret memo discussing criticisms and proposed improvements for a car, with comparisons made to the Phantom model.25th Jun 1929Box 65a \ 3  scan0043
Secret report detailing vehicle performance issues and suggestions for improvement, covering steering, petrol feed, and engine components.25th Jun 1929Box 65a \ 3  scan0044
The appearance of the chassis cross member and bonnet, with concerns about noise at speed.25th Jun 1929Box 65a \ 3  scan0045
Engine 'fuss or roar' by modifying the carburettor and defending recent chassis improvements.26th Jun 1929Box 65a \ 3  scan0046
Variations in steering, engine performance, and carburetter adjustments for a new chassis, possibly the Phantom II.28th Jun 1929Box 65a \ 3  scan0047
Field report on a car's journey, maintenance, and tyre condition from Grenoble.30th Jun 1929Box 65a \ 3  scan0048
Increased engine speeds and vibrations in faster cars.1st Jul 1929Box 65a \ 3  scan0049
List of queries and answers comparing the 'SS' model with the 'Phantom' model.1st Aug 1924Box 65a \ 3  scan0050
Question and answer document regarding vehicle lubrication and fluid quantities.1st Aug 1924Box 65a \ 3  scan0051
Q&A document page covering oil change intervals, oil pressure failures, and tappet clearances.1st Aug 1924Box 65a \ 3  scan0052
Page of questions and answers regarding mechanical settings for the Phantom model, including carburetter, fuel consumption, and brake adjustments.1st Aug 1924Box 65a \ 3  scan0053
List of brake system movement specifications and checks for Phantom and 20 HP models.1st Aug 1924Box 65a \ 3  scan0054
Series of questions and handwritten answers regarding brake effort, clutch, and hydraulic damper adjustments.1st Jul 1929Box 65a \ 3  scan0055
Engine noise ('fuss or roar') and clarifying the positive impression of improvements made to a chassis.1st Jul 1929Box 65a \ 3  scan0056
Improvements to 'SS' cars, persistent noise issues, and a proposal for comparative tests against a Phantom.1st Jul 1929Box 65a \ 3  scan0057
Secret memo from 'Sg' to 'Hs' arranging a road trial for car 21-EX to investigate ongoing noise issues.3rd Jul 1929Box 65a \ 3  scan0058
Arranging a meeting at Bignalls Corner regarding 'SS' cars.8th Jul 1929Box 65a \ 3  scan0059
Road test report on hotel letterhead detailing a journey from Grenoble to Auxerre and the car's performance.3rd Jul 1929Box 65a \ 3  scan0060
Ineffective front brakes and light rear suspension after a road test to Paris.3rd Jul 1929Box 65a \ 3  scan0061
Production schedule and timeline for the 40/50-HP Chassis, K2 series.3rd Jul 1929Box 65a \ 3  scan0062
Outlining suggested areas for experimental and development work on the chassis.1st Jul 1929Box 65a \ 3  scan0063
List of required design improvements and ongoing technical issues, being page 2 of a larger document.4th Jul 1929Box 65a \ 3  scan0064
Road test report on car 21-EX, diagnosing a high-speed petrol starvation issue caused by the autovac system, also noting high fuel consumption and steering performance.4th Jul 1929Box 65a \ 3  scan0065
Steering performance and potential wandering issues on a Verberley Patrol car following a road test.30th Aug 1934Box 65a \ 3  scan0066
Vehicle performance issues including overrun vibration, brake problems, and high water temperature during a trial.5th Jul 1929Box 65a \ 3  scan0067
Investigating the source of a booming engine noise in S.S. and 21-EX cars.5th Jul 1929Box 65a \ 3  scan0068
Proposal to visit Paris to repeat tests on vehicle 21-EX and assess improvements to axles and steering.6th Jul 1929Box 65a \ 3  scan0069
Testing for body booming, general engine noise, and front axle communication.6th Jul 1929Box 65a \ 3  scan0070
List of non-standard specifications for the rebuild of the 20-EX car.8th Jul 1929Box 65a \ 3  scan0071
Publicity strategy for a new 'SS' model, including commissioning an article from journalist Capt. Gordon Aston.9th Jul 1929Box 65a \ 3  scan0072
Faults found in a Bentley, including a 'jellied' radiator and defective steering.10th Jul 1929Box 65a \ 3  scan0073
Recommending the 18-EX car for a demonstration after tests on the Wellyn By-pass.11th Jul 1929Box 65a \ 3  scan0074


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