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
The use of Discol fuel in car engines.19th Aug 1924Box 32 \ 1  Scan100
Performance test comparison between 'Discol' and 'Petrol' fuels on a specific chassis.25th Jul 1924Box 32 \ 1  Scan101
Blank document page with a print room stamp from Derby.20th Aug 1924Box 32 \ 1  Scan102
Laboratory report detailing the distillation and specific gravity of a 50-50 Aviation Spirit and Benzole sample.21th May 1925Box 32 \ 1  Scan103
Use of BP, Shell, and Pratts petrol for testing cars and aero engines, including the introduction of tetra ethyl lead.15th Nov 1926Box 32 \ 1  Scan104
Internal memorandum about 'Ethyl' petrol containing T.E.L. and its suitability for company cars.21th Jan 1928Box 32 \ 1  Scan105
Outlining two tests to be carried out on a K-S petrol gauge.20th Oct 1928Box 32 \ 1  Scan106
Covering memo regarding correspondence with the Zollpeer Motor Fuel Co. about motor fuel.1st May 1929Box 32 \ 1  Scan107
Letter from Zollpeer Motor Fuel Co. offering a free sample of their 'Zollpeer Car Power' fuel additive for testing.30th Apr 1929Box 32 \ 1  Scan108
Letter to The Zolineer Motor Fuel Co. clarifying the procedure for motor fuel testing.1st May 1929Box 32 \ 1  Scan109
From Roy to Hs. regarding the late delivery of Ethylene Glycol.12th Aug 1929Box 32 \ 1  Scan110
Quality of Ethylene Glycol delivered by Imperial Chemical Industries.13th Aug 1929Box 32 \ 1  Scan111
Engine pinking, the use of different petrols, and using low-grade fuel in experimental cars to identify carburation faults.1st Oct 1929Box 32 \ 1  Scan112
Letter from British Petroleum Company Limited confirming the alcohol content of '33 Equals Brooklands Racing Mixture'.14th May 1930Box 32 \ 1  Scan113
Letter from the British Petroleum Company regarding the estimation of alcohol content in a fuel mixture.14th May 1930Box 32 \ 1  Scan114
Letter from British Petroleum concerning a meeting about 'Brooklands Racing Mixture' fuel.19th May 1930Box 32 \ 1  Scan115
The safety and effectiveness of Ethyl Petrol in the company's car engines.22th Jun 1931Box 32 \ 1  Scan116
Harold Moore opening a new laboratory for testing lubricating oils and motor fuels.1st Dec 1931Box 32 \ 1  Scan117
Letter from Harold Moore announcing the opening of a new laboratory for fuel analysis and valuation using a C.F.R. engine.1st Dec 1931Box 32 \ 1  Scan118
Article in 'Automobile Engineer' on tests of Dominion Motor Fuels and a related supply arrangement.7th Dec 1931Box 32 \ 1  Scan119
Clarifying the position on recommended fuels, particularly National Benzole Mixture.12th Feb 1932Box 32 \ 1  Scan120
Suggested letter stating the policy of not recommending specific fuel brands, such as National Benzole Mixture.19th Feb 1932Box 32 \ 1  Scan121
Specifications of a 'Safety Fuel' from the Standard Oil Co in New Jersey.11th Mar 1932Box 32 \ 1  Scan122
List of octane values for various commercially available fuels tested on an S.30 engine.24th Mar 1933Box 32 \ 1  Scan123
The relationship between front wheel braking systems and the geometry of true pivotal steering.18th Feb 1910Box 32 \ 2  Scan001
Published letter to the editor discussing the merits of true pivotal steering, with a diagram and an image of a Rudge-Whitworth wheel.4th Mar 1911Box 32 \ 2  Scan002
Technical discussion in the form of two letters regarding the design of front wheel brakes and pivotal steering.13th Jun 1907Box 32 \ 2  Scan003
Departmental memo suggesting alterations to rear brakes to prevent them from sticking due to water and mud.18th Mar 1911Box 32 \ 2  Scan004
Instruction regarding special larger covers for brake drums on wheels.20th Oct 1911Box 32 \ 2  Scan005
Two proposed schemes for the length of the brake hand lever and gear.15th Feb 1912Box 32 \ 2  Scan006
Suggestion to try a different fabric lining for the footbrake, instead of Ferodo.24th Oct 1912Box 32 \ 2  Scan007
The design and condition of the brakes, propeller shaft, and universal joints.24th Nov 1913Box 32 \ 2  Scan008
The investigation of uneven wear on rear wheel foot brake liners following tests.22th Aug 1914Box 32 \ 2  Scan009
Suggestion to test rear brakes by attaching a rolled steel rim to a sheet metal disc centre.15th Jun 1915Box 32 \ 2  Scan010
Extract detailing modifications to the back axle and brakes on experimental cars to reduce weight.1st May 1919Box 32 \ 2  Scan011
Requesting the standardization of a small stud to prevent outer brake shoe springs from fouling the inner brake drum.27th Aug 1919Box 32 \ 2  Scan012
Recommending an increase in clearance for the Brake Rope Connections on the 40/50 Chassis.29th Aug 1919Box 32 \ 2  Scan013
Prevention of oil leakage to the brakes from the back axle by fitting diaphragms.23th Sep 1919Box 32 \ 2  Scan014
Prints for making three experimental sets of a proposed oil catcher for the rear axle of a 40/50 chassis.23th Sep 1919Box 32 \ 2  Scan015
Issues with rear axle brake lubrication and arguing against American suggestions to remove lubricators.29th Jan 1920Box 32 \ 2  Scan016
Lubrication of the rear axle brake mechanism and the potential use of oilless bearings.2nd Feb 1920Box 32 \ 2  Scan017
Lubrication issues with the rear axle brake mechanism and a proposal for improvement.7th Sep 1920Box 32 \ 2  Scan018
Extract listing future schemes and improvements for starter and ignition systems.7th Sep 1920Box 32 \ 2  Scan019
Letter to Ferodo Limited regarding the co-efficient of friction for 9L brake and clutch material.7th Mar 1921Box 32 \ 2  Scan020
Letter confirming an order for 250 sets of Brake Shoe Facings made from the latest Ferobestos material.3rd Mar 1921Box 32 \ 2  Scan021
Test results for Ferodo brake material without brass wire, noting a lower co-efficient of friction.3rd Mar 1921Box 32 \ 2  Scan022
Acceptable gap for loose wheel flanges with reference to Goodyear and Dunlop specifications.5th Apr 1921Box 32 \ 2  Scan023
Faulty working brakes, specifically the seizing of the rear axle mechanism and related lubrication issues.25th Apr 1921Box 32 \ 2  Scan024
Squeaking brake mechanisms, attributing the fault to over-lubrication of the guide pins.10th Aug 1921Box 32 \ 2  Scan025
Brake polishing issues and proposing tests with a new brake material and annealed brake drums.10th Aug 1921Box 32 \ 2  Scan026
Footbrake glazing issues on the 40/50 chassis, proposing a new annealing treatment for brake drums.10th Oct 1921Box 32 \ 2  Scan027
Correspondence with supplier Ferodo Ltd. about a missing graph for a 40/50 HP chassis rear hub and brake.13th Oct 1921Box 32 \ 2  Scan028
Suggesting experimental tests to address issues with brake drum polishing and the consequent loss of braking effectiveness.14th Oct 1921Box 32 \ 2  Scan029
Performance, materials, and friction coefficient of brake drums and Ferodo brake liners.14th Oct 1921Box 32 \ 2  Scan030
Continued letter discussing experimental work and requesting assistance from Messrs. Ferodo Ltd.14th Oct 1921Box 32 \ 2  Scan031
Proposal to supply Ferodo Ltd. with a complete rear hub and brake assembly for testing brake liners.11th Nov 1921Box 32 \ 2  Scan032
Request for the return of a loaned pamphlet concerning 4-wheel brakes.4th Nov 1921Box 32 \ 2  Scan033
Brief note of thanks for a pamphlet on 4-wheel braking, which is being returned.5th Nov 1921Box 32 \ 2  Scan034
Cover note from Hs. to R. regarding an attached article on four-wheel braking.8th Nov 1921Box 32 \ 2  Scan035
Modification to the heat treatment process for 40/50 chassis brake drums.25th Aug 1922Box 32 \ 2  Scan036
Material characteristics and friction coefficient of the Ferodo brake lining on the 40/50 chassis rear brakes.3rd Oct 1922Box 32 \ 2  Scan037
Complaints of rattling brake ropes on the 40/50 chassis and a proposed temporary fix.12th Oct 1922Box 32 \ 2  Scan038
Sending drawings concerning the front wheel brakes of Saurer lorries.25th Oct 1922Box 32 \ 2  Scan039
Design and patent status of front wheel brakes used on Saurer Lorries.30th Oct 1922Box 32 \ 2  Scan040
Investigation report into the cause of rear brake squeaks, including a diagram of the brake shoes.28th Apr 1923Box 32 \ 2  Scan041
Foot brake issues, specifically squeaking and binding when brake shoes are reversed.30th May 1923Box 32 \ 2  Scan042
Blueprint and notice for a front wheel brake produced by Messrs LEMOINE.30th May 1923Box 32 \ 2  Scan043
Letter from Établissements Lemoine proposing their new HERBOT front-wheel braking system.29th May 1923Box 32 \ 2  Scan044
Promotional document in French for the Hersot front brake system by Établissements Lemoine.29th May 1923Box 32 \ 2  Scan045
Promotional leaflet for the Lemoine-patented Hersot front brake system, detailing its characteristics and advantages.29th May 1923Box 32 \ 2  Scan046
Tests to ascertain the effect of a 20 lb load on 40/50 Chassis Brake Springs G335 when heated to various temperatures.31th Aug 1923Box 32 \ 2  Scan047
Fifth laboratory test report on 40/50 Chassis Brake Springs G335, detailing changes in length after heat treatment.31th Aug 1923Box 32 \ 2  Scan048
Cover note for a press extract concerning the Midland Automobile Club's Shelsley Walsh Hill Climb.11th Sep 1923Box 32 \ 2  Scan049
Letter from automobile component manufacturer Alford & Alder regarding their patented Front Wheel Brakes.29th Sep 1923Box 32 \ 2  Scan050
Continuation sheet of a letter from Alford & Alder regarding the trial of their brakes.27th Nov 1923Box 32 \ 2  Scan051
Attaching a copy of the description and blueprints for the U.S. Axle Company's front wheel brake design.27th Nov 1923Box 32 \ 2  Scan052
Letter forwarding a front wheel brake design from the U.S. Axle Company for inspection and comment.16th Nov 1925Box 32 \ 2  Scan053
Letter to the U.S. Axle Company acknowledging receipt of front wheel brake blueprints and forwarding them to the design department in England.16th Nov 1923Box 32 \ 2  Scan054
Copy of a document from The U.S. Axle Company detailing their front wheel brake data.16th Nov 1923Box 32 \ 2  Scan055
Graph of torque input versus torque output, showing the friction effect for a W.W. slow speed servo.18th Jun 1924Box 32 \ 2  Scan056
Excessive wear on brake drums for chassis 56-S-5 and the proposed repair procedures.18th Jun 1924Box 32 \ 2  Scan057
Air Brakes and the forwarding of related documents.7th Jul 1924Box 32 \ 2  Scan058
The inaccuracies of road tests published in motor papers due to speedometer errors.1st Mar 1925Box 32 \ 2  Scan059
Analysing the improbable performance claims of a 45 HP Renault competitor vehicle.21th Mar 1925Box 32 \ 2  Scan060
Page discussing vehicle performance discrepancies and testing methods.21th Mar 1925Box 32 \ 2  Scan061
Renault acceleration curves and horsepower calculations.21th Mar 1925Box 32 \ 2  Scan062
Concave HP curves and the impossibility of constant acceleration in touring car engines.1st Mar 1925Box 32 \ 2  Scan063
Analyzing braking test methodologies and their inherent inaccuracies.23th Mar 1925Box 32 \ 2  Scan064
Brake efficiency and critiquing braking curves from 'The Motor' magazine.1st Mar 1925Box 32 \ 2  Scan065
Page 4 of an experimental report critiquing the braking test methodology used by 'The Motor' magazine.23th Mar 1925Box 32 \ 2  Scan066
Time-velocity curve graph for a 40/50 R.R. Open Touring car, comparing it with a 45 Renault.26th Feb 1923Box 32 \ 2  Scan067
Blueprint graph showing braking curves for a 40/50 model car under various conditions.19th Mar 1925Box 32 \ 2  Scan068
Three graphs comparing braking performance curves for a 14 HP Sports Delage, a 12-25 HP Vermorel, and an 11-24 Lagonda.23th Mar 1925Box 32 \ 2  Scan069
Stamped document from the Print Room in Derby.23th Mar 1925Box 32 \ 2  Scan070
Comparative analysis of velocity curves for a Bentley Speed Model and a Vermorel 12-25, with commentary.17th Mar 1925Box 32 \ 2  Scan071
Blank document page featuring a red ink stamp.25th May 1925Box 32 \ 2  Scan072
Graphical analysis of the acceleration curves for a 45 HP Renault.3rd Mar 1925Box 32 \ 2  Scan073
Blank document sheet with a Print Room stamp.21th Mar 1925Box 32 \ 2  Scan074
Graph charting the average coefficient of friction and temperature of Ferodo bonded asbestos lining over one hour.8th May 1925Box 32 \ 2  Scan075
Stamped page from the Print Room with a list of four handwritten numbers.8th May 1925Box 32 \ 2  Scan076


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