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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Instructions to chamfer bolt holes in planet wheels at 30 degrees to remove fraize from drilling and reaming.23th Jun 1917Box 37 \ 4  scan 154
100-hour engine test, detailing experimental parts tested and subsequent component failures.19th Jul 1917Box 37 \ 4  scan 155
Condition of various engine components after a test run, including the camshaft, gears, and pistons.19th Jul 1917Box 37 \ 4  scan 156
Continued page of a document describing a severe test on a piston.21th Jun 1917Box 37 \ 4  scan 157
Instructions for experiments to be incorporated into the 100-hour endurance test of the Experimental Falcon 'B' Engine.21th Jun 1917Box 37 \ 4  scan 158
'Eagle' engine's epicyclic gear floating sun wheel bush scheme, including part numbers and an assembly sketch.15th May 1917Box 37 \ 4  scan 159
Chasing an urgent and delayed order for a floating sunwheel bush.18th Jun 1917Box 37 \ 4  scan 160
Decision not to fit the X.3047 floating bush in the sunwheel for the Experimental Eagle 'E' Engine.23th Jun 1917Box 37 \ 4  scan 161
Chasing a report on the Epicyclic Gear - Floating Sunwheel Bush Scheme.9th Jul 1917Box 37 \ 4  scan 162
To Mr. Clark regarding the completion status of the floating sun wheel bush job.9th May 1917Box 37 \ 4  scan 163
Instruction sheet noting the fitting of a sun wheel with a floating bush on an epicyclic gear for an experimental engine.15th Aug 1917Box 37 \ 4  scan 164
Performance of a floating sun-wheel bush, recommending to continue with the existing method of fixing bushes with round keys.1st Oct 1917Box 37 \ 4  scan 165
The experiment for a floating sunwheel bush.3rd Jan 1918Box 37 \ 4  scan 166
Order for modified magneto driving pieces for 'Eagle' engines.18th May 1917Box 37 \ 4  scan 167
Instructions for incorporating an experiment on more flexible magneto couplings into an engine endurance test.22th Jun 1917Box 37 \ 4  scan 168
To Mr. Clark detailing the conversion of a C2 engine into an Eagle 8 type, listing the experimental parts used.5th Oct 1917Box 37 \ 4  scan 169
Experiment remarks on thinner plates for magneto driving spindles.23th Oct 1917Box 37 \ 4  scan 170
Issues with a new magneto drive, comparing it unfavorably to the previous design.24th Oct 1917Box 37 \ 4  scan 171
Use of aluminium versus gun-metal for starter motor brush holders.13th Jun 1919Box 37 \ 4  scan 172
Proposed induction system for the Condor engine based on Mr. Royce's instructions.22th Feb 1918Box 37 \ 4  scan 173
Instructions concerning an urgent test of a proposed induction system for the Condor engine, comparing it with the Eagle engine's setup.26th Apr 1917Box 37 \ 4  scan 174
Performance results of Condor type induction pipes compared to standard pipes and plans for further tests.28th Feb 1918Box 37 \ 4  scan 175
Extract detailing the testing of 3-cylinder induction pipes on a six-cylinder Eagle engine.1st Mar 1918Box 37 \ 4  scan 176
Potential cracking in new drop-forged rocker levers and the need for an endurance test.25th Oct 1918Box 38 \ 1  Scan001
Letter from a supplier regarding the machining and material properties of rocker stampings and forgings.22th Oct 1918Box 38 \ 1  Scan002
Letter from Linotype & Machinery Ltd. regarding the supply of special rockers and subsequent modifications to jigs.1st Dec 1918Box 38 \ 1  Scan003
Request for a report on the endurance test of valve rocker levers made from new style forgings.1st Dec 1918Box 38 \ 1  Scan004
Stating that Linotype valve rocker levers are now standard.20th Mar 1919Box 38 \ 1  Scan005
Issues with a sample delivery of Hessbright ball bearings for American engines, requesting an urgent experimental test.24th Apr 1918Box 38 \ 1  Scan006
Testing of Hessbright ball bearings for epicyclic gears and the use of steel versus phosphor bronze cages.15th Jun 1918Box 38 \ 1  Scan007
Letter discussing sample planet ball bearings sent to Derby for trial, comparing Hess-Bright and Hoffman bearings.4th May 1918Box 38 \ 1  Scan008
The handover of American ball bearings for testing upon arrival.21th Nov 1918Box 38 \ 1  Scan009
Test report on the performance and failure of Hess-Bright ball bearings for planet wheels after running on an Eagle engine.23th Oct 1918Box 38 \ 1  Scan010
The failure of ball bearings used in place of roller bearings on an 'Eagle' Epicyclic Gear.24th Oct 1918Box 38 \ 1  Scan011
Bearing endurance testing, the replacement of Hess-Bright bearings, and sending parts to Mr. Royce.26th Apr 1917Box 38 \ 1  Scan012
Report concerning the failure of sample Hessbright planet wheel ball bearings for American engines.25th Oct 1918Box 38 \ 1  Scan013
Request for balls from a faulty planet wheel bearing to analyze the chromium percentage.31th Oct 1918Box 38 \ 1  Scan014
The shipment and testing of planet wheel ball bearings for American engines' epicyclic gears.8th Nov 1918Box 38 \ 1  Scan015
Laboratory report on the chemical analysis of a failed Hessbright Bearing from an American Planet Wheel.23th Jan 1919Box 38 \ 1  Scan016
Letter regarding an order and testing of standard 35mm ball bearings from the Hess-Bright Manufacturing Co.6th Nov 1917Box 38 \ 1  Scan017
List of parts sent from the United States requiring experimental work.30th Jan 1920Box 38 \ 1  Scan018
List of parts received from Mr. Olley for inspection and testing.4th Mar 1920Box 38 \ 1  Scan019
Extract discussing the sourcing of various car parts proposed to be sent to America.7th Jun 1920Box 38 \ 1  Scan020
Two illustrations of a 'Q' Meter, a device for measuring air flow capacity.4th Jan 1918Box 38 \ 1  Scan021
Letter from consulting engineer G. J. Gibbs concerning the design and operation of patented air meters.19th Nov 1918Box 38 \ 1  Scan022
Inquiry about the accuracy of flow meters used for measuring air supply to internal combustion engines.7th Dec 1918Box 38 \ 1  Scan023
Page 2 of a letter inquiring about the supply of meters to measure atmospheric conditions.12th Dec 1918Box 38 \ 1  Scan024
Letter from consultant G. J. Gibbs arranging a visit to discuss air and flow meters.12th Dec 1918Box 38 \ 1  Scan025
Letter to Mr. G.J. Gibbs confirming a meeting regarding air flow meters.16th Dec 1918Box 38 \ 1  Scan026
New D.C. Constant Voltage Generator, suggesting a potential experiment using parts from an old starter motor.26th Apr 1917Box 38 \ 1  Scan027
Evaluation of a new system from 'Electrical Review', cautioning against its construction if it is too heavy.11th Nov 1918Box 38 \ 1  Scan028
Page from 'The Electrical Review' detailing a D.C. generator for constant pressure at variable speed.4th Oct 1918Box 38 \ 1  Scan029
Blank document page with a Print Room reception stamp from Derby.4th Oct 1918Box 38 \ 1  Scan030
Page from The Electrical Review journal discussing machine voltage and listing new patents.4th Oct 1918Box 38 \ 1  Scan031
Cover page marked with a Print Room reception stamp.2nd Nov 1913Box 38 \ 1  Scan032
Urgent need to test a double-strength spring on the petrol control valve to prevent wear on the needles.20th Sep 1918Box 38 \ 1  Scan033
Proposal for material changes to an altitude control valve for carburetters, specifying Brinell hardness.7th Nov 1918Box 38 \ 1  Scan034
Fitting of altitude control needles for 'Eagle' engines on DeH.4 machines.26th Apr 1917Box 38 \ 1  Scan035
Series 8 Altitude Controls, engine settings, and post-delivery adjustments.23th Nov 1917Box 38 \ 1  Scan036
Internal memorandum about standardising the altitude control needles for Falcon and Eagle engines.30th Nov 1917Box 38 \ 1  Scan037
Corrosion found on carburetter petrol control valves, suggesting the use of stainless steel for both the valves and rivets.11th Feb 1918Box 38 \ 1  Scan038
Carburettor vibration issues with the 8-Eagle Altitude Control Needle.16th Aug 1921Box 38 \ 1  Scan039
Design modifications to the steering gear for the 45/50 HP chassis.29th Nov 1918Box 38 \ 1  Scan040
Request to manufacture a single F.887 Steering Worm for testing purposes.28th Jan 1919Box 38 \ 1  Scan041
Query regarding the black finish and engraving on chassis steering column quadrants.20th Jun 1919Box 38 \ 1  Scan042
Assembly list for Chassis 1. E.X., detailing components, part numbers, and remarks for the 'F' section.30th Jun 1919Box 38 \ 1  Scan043
Fractured steering box rocking lever and front road spring during chassis testing on a bumping rig, including material analysis.11th Aug 1919Box 38 \ 1  Scan044
Analysis report on a fractured road spring, detailing its chemical composition and Brinell hardness tests.11th Aug 1919Box 38 \ 1  Scan045
40/50 chassis bumping test, its setup, and a comparison of results to pre-war tests.18th Aug 1919Box 38 \ 1  Scan046
Tabulated log detailing component failures, their run time, and remarks on the issues.18th Apr 1918Box 38 \ 1  Scan047
Failure of a pendulum steering lever, debating its cause and appropriate material selection.27th Aug 1919Box 38 \ 1  Scan048
The mandatory Brinell hardness testing of steering levers to ensure correct heat treatment.6th Sep 1919Box 38 \ 1  Scan049
Proposal to standardize steering columns to two positions for English cars.19th Sep 1919Box 38 \ 1  Scan050
Fractured rocking lever in a steering box for a 40/50 HP chassis.25th Sep 1919Box 38 \ 1  Scan051
Decision between 'A' steering and a long chassis, relaying Mr. Royce's opinion on the matter.27th Sep 1919Box 38 \ 1  Scan052
Investigation into the failures of pendulum steering levers and summarizing results from bumping tests.30th Sep 1919Box 38 \ 1  Scan053
The rig testing of standard and redesigned levers, analysing failures and proposing design modifications to improve strength and reduce cracking.30th Sep 1919Box 38 \ 1  Scan054
Extract from Coachbuilders Conference No 6 discussing new steering column positions.8th Oct 1919Box 38 \ 1  Scan055
Standardisation of steering types and long chassis for the 40/50 HP model.13th Oct 1919Box 38 \ 1  Scan056
Proposal to abandon 'A' type steering in favour of 'B' type steering on the long chassis after the first 500 are produced.7th Oct 1919Box 38 \ 1  Scan057
Proposal to abandon 'A' type steering in favour of 'B' type for longer chassis models.9th Oct 1919Box 38 \ 1  Scan058
The decision to cancel a proposal to abandon 'A' type steering, continuing its use pending tests on an experimental long chassis.30th Oct 1919Box 38 \ 1  Scan059
The failure of a side member and steering rocking lever during a bump test on a 40/50 chassis.27th Nov 1919Box 38 \ 1  Scan060
Laboratory analysis report on a fractured steering rocking shaft and a car frame part.14th Apr 1919Box 38 \ 1  Scan061
Analysis of a component failure attributed to a low yield point and repeated bending stress.25th Nov 1919Box 38 \ 1  Scan062
Modifications requested by Mr. Royce for a steering box axle following a bump test.5th Dec 1919Box 38 \ 1  Scan063
Faulty oil lip type lubricators on the steering column, which are easily damaged, and a suggestion for a smaller replacement.29th Mar 1920Box 38 \ 1  Scan064
Response to various reported complaints about an open trials car, including noises and a radiator leak.14th Apr 1920Box 38 \ 1  Scan065
Follow-up letter detailing an ongoing investigation into vehicle faults, including a slipper drive and side shaft slack.6th Mar 1946Box 38 \ 1  Scan066
Failure of aluminium steering boxes and general unsatisfactory steering, with proposed considerations for improvement.23th Apr 1920Box 38 \ 1  Scan067
Improvements and tests on steering problems, specifically regarding springs and pendulum levers.28th Apr 1920Box 38 \ 1  Scan068
Design of a withdrawing device for a pendulum steering lever.3rd Jun 1920Box 38 \ 1  Scan069
Pressing for a scheme of plain thrust in the steering column using journal ball bearings to make it less reversible.2nd Aug 1920Box 38 \ 1  Scan070
Comparison of deflection and permanent set under load for Old style H section levers versus Oval section levers.19th Aug 1920Box 38 \ 1  Scan071
Test report card detailing a bumper spring failure.1st Sep 1920Box 38 \ 1  Scan072
Letter from Rolls-Royce of America reporting steering troubles on imported cars due to ball bearing wear.1st Sep 1920Box 38 \ 1  Scan073
Failure of a cross steering shaft on an experimental car due to low-speed steering wobbles.28th Oct 1920Box 38 \ 1  Scan074
Proposed thickening of a steering column ball bearing housing.27th Nov 1920Box 38 \ 1  Scan075
Steering column ball bearing housing slack and potential design modifications.4th Oct 1920Box 38 \ 1  Scan076
The uses and potential applications of Bakelite in automobile components like gears, coachwork, and steering wheels.21th Dec 1920Box 38 \ 1  Scan077


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