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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Letter from Rolls-Royce of America to E.W. Hives in Derby, following up on queries about the 20HP car's performance and handling.31th Aug 1928Box 113 \ 2  scan0139
List of topics covering engine mounts, gauges, fabrics, and tests for various car models.20th Sep 1928Box 113 \ 2  scan0140
Performance comparison of Mr. Royce's 20 HP car against a Buick and various Chrysler models.20th Sep 1928Box 113 \ 2  scan0141
From 'R' considering four potential solutions to the problem of increased acceleration in cars.16th Oct 1928Box 113 \ 2  scan0142
Power increase for the 'CHINA' 25 HP engine, covering timing, valve sizes, materials and pipe dimensions.4th Nov 1929Box 113 \ 2  scan0143
Typed memorandum detailing proposed modifications to various engine components.4th Nov 1929Box 113 \ 2  scan0144
Methods to improve vehicle acceleration through engine power and gearbox modifications.7th Nov 1928Box 113 \ 2  scan0145
Technical discussion on an advanced epicyclic gearbox unit compared to existing systems.29th Nov 1928Box 113 \ 2  scan0146
Secret internal memo concerning experimentation on accelerations.29th Nov 1928Box 113 \ 2  scan0147
Performance comparison memo for the 20 HP engine, detailing the power increase from a turbulent head versus the standard compression.26th Apr 1929Box 113 \ 2  scan0148
Comparative analysis of power and road performance for a modified 20 HP engine with an increased bore.27th Apr 1929Box 113 \ 2  scan0149
Performance comparison report on road tests and acceleration for various car models, including a Stanton Hill test analysis.27th Apr 1929Box 113 \ 2  scan0150
Performance tests, comparing speedometer readings and power curves for different car models.27th Apr 1929Box 113 \ 2  scan0151
Comparison table of specifications and performance data for various car models.27th Apr 1929Box 113 \ 2  scan0152
Graph comparing the top gear acceleration performance of various car models.27th Apr 1929Box 113 \ 2  scan0153
Performance graph of B.HP at the road wheels vs. Engine R.P.M. for various 20 HP engine configurations.29th May 1929Box 113 \ 2  scan0154
Comparative performance test report between the 19-EX and a standard Phantom chassis.29th May 1929Box 113 \ 2  scan0155
Tests to determine the fastest method for climbing Ticknall Hill in a 10-EX vehicle, with comparisons to other cars.22th Aug 1929Box 113 \ 2  scan0156
Report from Paris comparing the acceleration of American versus British chassis.26th Oct 1929Box 113 \ 2  scan0157
Comparative tests of 11/50 and 12/50 rear axle gear ratios for 25 HP high compression cars.7th Feb 1930Box 113 \ 2  scan0158
Comparison report on 12/50 and 11/50 axle ratios with hill climb test results and recommendations.7th Feb 1930Box 113 \ 2  scan0159
'TEL' acceleration and deceleration recorder.11th Nov 1930Box 113 \ 2  scan0160
Letter from Hasler Telegraph Works regarding their 'TEL' Acceleration & Deceleration Recorder instrument.11th Nov 1930Box 113 \ 2  scan0161
Descriptive document for the 'TEL' Acceleration and Braking Recorder, outlining its purpose and mechanical operation.11th Nov 1930Box 113 \ 2  scan0162
Graph illustrating the movement of a pointer and stylus, plotting the graduation of a dial against running time in seconds.11th Nov 1930Box 113 \ 2  scan0163
Page describing the function of a recording stylus and diagram roll for a measuring instrument.11th Nov 1930Box 113 \ 2  scan0164
Photograph and dimensional drawings of a tachograph instrument.11th Nov 1930Box 113 \ 2  scan0165
Page 3 of a document detailing the operation and specifications of a recording instrument and a 'TEL' Accelerometer.11th Nov 1930Box 113 \ 2  scan0166
Photograph and reversed text describing a 'Tapley' Gradometer test rig attached to a car.11th Nov 1930Box 113 \ 2  scan0167
Page explaining the function and data interpretation of a fifth wheel drive and accelerometer for vehicle testing.11th Nov 1930Box 113 \ 2  scan0168
Page explaining the methodology for measuring vehicle speed and acceleration over specific time periods.11th Nov 1930Box 113 \ 2  scan0169
Analysis of vehicle acceleration and braking performance calculations based on a speed diagram.11th Nov 1930Box 113 \ 2  scan0170
Explanation of a diagram showing speed and braking measurements over sequential periods.11th Nov 1930Box 113 \ 2  scan0171
Analysis of a braking diagram, summarizing speed, distance, time, and deceleration.11th Nov 1930Box 113 \ 2  scan0172
Remarks on interpreting diagram data for vehicle speed and acceleration over measurement periods.11th Nov 1930Box 113 \ 2  scan0173
Conversion table of speed (km/h or mph) to distance travelled per 1/2 second (metres or feet).11th Nov 1930Box 113 \ 2  scan0174
Technical graph, labeled Fig. 5, showing a plotted curve on a grid with various annotations and measurements.21th Nov 1931Box 113 \ 2  scan0175
Comparison of acceleration performance and weight for car models 18-GIV and 14-GIV.21th Nov 1931Box 113 \ 2  scan0176
Consumption and acceleration tests on a semi-expanding carburetter using different needles.7th Nov 1932Box 113 \ 2  scan0177
Proposal to modify the air valve, needle, and diffuser to improve mixture control and fuel consumption.29th Jun 1933Box 113 \ 2  scan0178
Acceleration test results for vehicle 27-EX on Shardlow Road.29th Jun 1933Box 113 \ 2  scan0179
Comparison of mean way acceleration times for vehicles 25-EX, 19-EX, and 27-EX.8th Aug 1933Box 113 \ 2  scan0180
Acceleration performance test data for a Bentley with different axle configurations and settings.21th Aug 1933Box 113 \ 2  scan0181
Requesting performance figures for a production model, specifically on braking, acceleration with a 10/41 axle ratio, and compression ratio.25th Sep 1933Box 113 \ 2  scan0182
Providing acceleration performance figures for a Bentley 1.B.IV saloon car.26th Sep 1933Box 113 \ 2  scan0183
Acknowledging receipt of Bentley performance figures and anticipating further data on braking.27th Sep 1933Box 113 \ 2  scan0184
Speedometer accuracy and acceleration test results for an Essex Terraplane.30th Sep 1933Box 113 \ 2  scan0185
Performance tests on an Essex Terraplane car.13th Oct 1933Box 113 \ 2  scan0186
Comparison of acceleration figures for a 3 1/2 litre Bentley against an Alvis 20, Talbot 105, and Essex Terraplane.13th Oct 1933Box 113 \ 2  scan0187
Urgent request for a comparison of acceleration speeds between the 20 HP, early 20/25 HP, and present 20/25 HP models.27th Oct 1933Box 113 \ 2  scan0188
Attaching acceleration curves for the original 20 HP, early 20/25 HP, and present standard 20/25 HP car models.30th Oct 1933Box 113 \ 2  scan0189
Comparative acceleration graph plotting car speed against time for three vehicle models.30th Oct 1933Box 113 \ 2  scan0190
Performance and acceleration figures comparing a Standard Carburettor with a New Type Carburettor.13th Feb 1934Box 113 \ 2  scan0191
Issues with an inadequate throttle spring on the Phantom III and introducing a stronger replacement.19th Oct 1936Box 113 \ 2  scan0192
Showing acceleration figures for a 3 1/2 Litre Bentley.15th Mar 1937Box 113 \ 2  scan0193
Acceleration tests conducted on a vehicle before and after altering the axle ratio.28th Mar 1938Box 113 \ 2  scan0194
Proposal for a new type of lock to prevent car theft by securing the change speed lever.12th May 1919Box 113 \ 3  scan0001
Suggestions for car anti-theft locks, focusing on a steering lock combined with a switch.12th May 1919Box 113 \ 3  scan0002
Provisional specification for an anti-theft device by locking the transmission.26th Jun 1919Box 113 \ 3  scan0003
Oilless bearings, anti-rattling bonnet packing, and thief-proofing measures.2nd Dec 1919Box 113 \ 3  scan0004
Car theft prevention and a detailed analysis of various wheel types, including wire, disc, and wood.31th Aug 1920Box 113 \ 3  scan0005
Ignition locks and new instrument board fittings.31th Aug 1920Box 113 \ 3  scan0006
Redesigning ignition locks and considering quotations for electrical equipment from mass producers versus in-house manufacturing.19th Nov 1920Box 113 \ 3  scan0007
Policy for standardising accessories and the instrument board for the Goshawk 11 chassis.30th Dec 1921Box 113 \ 3  scan0008
Standard accessories for the Goshawk II chassis and the standardization of the instrument board.7th Jan 1922Box 113 \ 3  scan0009
Standardising accessories, specifically the speedometer and electrical system, for the Goshawk 11 car.9th Jan 1922Box 113 \ 3  scan0010
Requesting prices to standardise the make of Speedometer and Clock for the Goshawk 11 engine.1st Jan 1922Box 113 \ 3  scan0011
Decisions made on various vehicle accessories.10th Jan 1922Box 113 \ 3  scan0012
Handling correspondence for accessories, returning horn fittings, and testing a new petrol filler.14th Feb 1922Box 113 \ 3  scan0013
Query regarding a new arrangement for the tail-light and number plate on the Goshawk 11 model.14th Feb 1922Box 113 \ 3  scan0014
New petrol valve design, comparing it to existing taper taps and recommending a trial.24th Feb 1926Box 113 \ 3  scan0015
Need for a more explanatory and up-to-date list of recommended accessories.13th Dec 1926Box 113 \ 3  scan0016
Article from 'The Motor' magazine describing a new four-way direction indicator from Lucas.22th Feb 1927Box 113 \ 3  scan0017
The proposed position for carrying the jack and pump to avoid enlarging the running-board toolboxes.8th Mar 1927Box 113 \ 3  scan0018
Weight of the subframe for the 18-EX car and a query about ordering its accessories.20th Oct 1928Box 113 \ 3  scan0019
The arrangement of accessories for car 18.EX, including the instrument board and lighting.27th Oct 1928Box 113 \ 3  scan0020
Status report on the supply and fitting of accessories for experimental cars.16th Nov 1928Box 113 \ 3  scan0021
Page two of a document detailing the order status for Cobra horns for models 20-EX, 21-EX, 22-EX and 23-EX.20th Nov 1928Box 113 \ 3  scan0022
Despatch and procurement of lamps and a trunk for Mr. Royce's car, No. 18-EX.20th Nov 1928Box 113 \ 3  scan0023
List of standard and additional accessories for a 20-EX Hooper Enclosed Limousine.28th Nov 1928Box 113 \ 3  scan0024
Specifications for accessories on a 19-EX Hooper Sedanca.28th Nov 1928Box 113 \ 3  scan0025
Ordering and dispatch of various accessories for a 19-EX Hooper Sedanca vehicle.29th Nov 1928Box 113 \ 3  scan0026
Accessories for the 19-EX car, specifically the head and tail lamps.29th Nov 1928Box 113 \ 3  scan0027
Supply of various components for a Hooper enclosed limousine.30th Nov 1928Box 113 \ 3  scan0028
List of parts delivered to Hoopers, Chelsea, for the Experimental Enclosed Limousine No. 20-EX.7th Dec 1928Box 113 \ 3  scan0029
Accessory list for the 21-EX Barker Enclosed Limousine and the 22-EX Hooper Enclosed Landaulet.18th Dec 1928Box 113 \ 3  scan0030
Specification list of accessories for a Closed Coupled All Weather Barker model.18th Dec 1928Box 113 \ 3  scan0031
Supply and dispatch of accessories for Experimental Sedanca No.19-EX.19th Dec 1928Box 113 \ 3  scan0032
Letter detailing the sourcing and dispatch of various car accessories in response to a telegram.19th Dec 1928Box 113 \ 3  scan0033
Parts ordered for Chassis No.21-EX and No.22-EX.20th Dec 1928Box 113 \ 3  scan0034
Listing parts ordered and to be procured for an Experimental All-weather Car, No.16-G-4.20th Dec 1928Box 113 \ 3  scan0035
Letter to Messrs. Hooper & Co. Ltd. confirming the delivery of a Bosch dual wiper for an experimental car.9th Jan 1929Box 113 \ 3  scan0036
Letter to Barker & Co. Ltd. confirming the delivery of a Bosch dual wiper for Experimental Limousine No. 21-EX.8th Jan 1929Box 113 \ 3  scan0037
Letter to Messrs. Barker & Co. Ltd. regarding the fitting of a wiper and spot lamp to experimental car 16-G-4.9th Jan 1929Box 113 \ 3  scan0038
List of accessories despatched for experimental cars.15th Jan 1929Box 113 \ 3  scan0039
Confirming the dispatch of a spot lamp and horn to the Carlton Carriage Co. for Open Car No. 23-EX.19th Jan 1929Box 113 \ 3  scan0040
Weight of accessories, tools, and bodies for experimental cars 18-EX and 22-EX.30th Jan 1929Box 113 \ 3  scan0041
Whether to manufacture electrical accessories in-house or license designs, prompted by the reliability of Bosch products.1st Feb 1929Box 113 \ 3  scan0042
Quality and selection of various car accessories.6th Mar 1929Box 113 \ 3  scan0043
Potential improvements and alternatives for vehicle lighting systems, including tail lamps, stop lamps, and direction indicators.6th Mar 1929Box 113 \ 3  scan0044


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