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
Tests on steering problems, proposing spring modifications, and actions regarding pendulum levers.28th Apr 1920Box 20 \ 2  Scan087
Solution for Mr. Horlick's complaint by altering a trials car's steering.5th May 1920Box 20 \ 2  Scan088
Steering modifications to an open trials car and arranging a visit with Mr. Horlick.7th May 1920Box 20 \ 2  Scan089
Proposed improvements and standardization for steering systems, including pivot lean and ball ends.10th May 1920Box 20 \ 2  Scan090
Proposed scheme for a plain thrust steering column to make it less reversible.2nd Aug 1920Box 20 \ 2  Scan091
Comparison of steering performance and behaviour between experimental cars 1.EX and 6.EX.23th Aug 1920Box 20 \ 2  Scan092
Continued memo describing vehicle stability on a narrow, curved road track, analogized to a belt on a pulley.23th Aug 1920Box 20 \ 2  Scan093
Customer complaints about production cars, attributing steering issues to the American tyres being used.7th Sep 1920Box 20 \ 2  Scan094
Steering faults, including 'steering wobbles', their causes, and proposed remedies.7th Sep 1920Box 20 \ 2  Scan095
Steering at high speed, detachable rims, steering wobble, and transmission knock.7th Sep 1920Box 20 \ 2  Scan096
Suspension design, transmission issues, and electrical installation plans for a new chassis.19th Jul 1920Box 20 \ 2  Scan097
Steering complaints, detailing four possible causes for steering trouble in cars.9th Sep 1920Box 20 \ 2  Scan098
Report page discussing the causes of steering wobble and experiments to resolve the issue.9th Sep 1920Box 20 \ 2  Scan099
Wheel wobble testing, linking it to pivot alignment, and historical issues with post-war car steering.9th Sep 1920Box 20 \ 2  Scan100
Steering instability, wheel oscillation, and Mr. Royce's proposed solutions involving friction and springs.9th Sep 1920Box 20 \ 2  Scan101
Steering system experiments, detailing friction adjustments and material tests to resolve steering wobble issues.9th Sep 1920Box 20 \ 2  Scan102
The causes and potential cures for steering wobbles, including tests on wheels, tyres, and friction devices.9th Sep 1920Box 20 \ 2  Scan103
Front axle wear and the use of a plain thrust washer to manage steering friction.9th Sep 1920Box 20 \ 2  Scan104
Letter discussing chassis troubles and steering complaints, specifically relating to low-speed steering wobble.7th Oct 1920Box 20 \ 2  Scan105
The causes and potential cures for steering wobble, including tire pressure and friction devices.7th Oct 1920Box 20 \ 2  Scan106
Letter discussing steering wobble in cars, potential cures, and the effects of different components on steering sensitivity.24th Jan 1921Box 20 \ 2  Scan107
Comparison of 'Marmon' steering with the company's own central point steering system.24th Jan 1921Box 20 \ 2  Scan108
Continued discussion on steering design, comparing different wheel types and pivot arrangements.24th Jan 1921Box 20 \ 2  Scan109
Causes of road shock in steering systems and proposed modifications for all cars.29th Mar 1924Box 20 \ 2  Scan110
Danger of fitting front brakes to cars with steel artillery wheels due to steering issues caused by increased pivot over-hang.1st Apr 1924Box 20 \ 2  Scan111
Modifications to steering and suspension to mitigate road shocks, including a diagram of a pendulum lever with a friction damper.10th Apr 1924Box 20 \ 2  Scan112
Private memo from 'Ps' to 'Hs' regarding an enclosed letter about a steering mechanism.28th Jun 1926Box 20 \ 2  Scan113
Letter from a consulting engineer detailing a patent for a new hydraulic steering mechanism.24th Aug 1926Box 20 \ 2  Scan114
Voluminous French file on M. Renaudin's steering invention.24th Aug 1926Box 20 \ 2  Scan115
Declining interest in M. Renaudin's steering gear mechanism after examination.1st Sep 1926Box 20 \ 2  Scan116
Steering ratios, comparing them with competitors, and considering improvements for flexibility and comfort.16th Apr 1928Box 20 \ 2  Scan117
Data sheet on Bensport steering 'Out of centre point' measurements for various models and wheel types.19th May 1933Box 20 \ 2  Scan118
Efficiency tests of a Steering Nut with Reduced Surfaces compared to a standard nut.22th Nov 1933Box 20 \ 2  Scan119
Effects on thread contact when adjusting for wear in a nut by reducing shims.22th Nov 1933Box 20 \ 2  Scan120
Suggestion to add a square to the clutch trunnion's ball end socket for future forgings.21th Sep 1911Box 20 \ 3  Scan001
Improvements to clutch design, proposing a new arrangement with a non-combustible, non-metallic face and no oil.12th Oct 1911Box 20 \ 3  Scan002
Clutch design, comparing leather, cone, and dry plate clutches, and experiments with cotton and asbestos friction materials.12th Dec 1910Box 20 \ 3  Scan003
Request to produce six socket bolts for a clutch mechanism for experimental purposes.27th Oct 1911Box 20 \ 3  Scan004
Meeting minutes discussing the materials, storage, and testing of the cone clutch, and the progress of the plate clutch.1st Nov 1911Box 20 \ 3  Scan005
Meeting notes discussing a suggestion for clutch trunnion lubrication and the storage method for clutch leathers.16th Nov 1911Box 20 \ 3  Scan006
Urgent implementation of a new heavier flywheel as standard and the required alterations.27th Nov 1911Box 20 \ 3  Scan007
Experimental clutch ring and large flywheel test report card.30th Sep 1911Box 20 \ 3  Scan008
Requesting the addition of a second oil hole to the clutch trunnion lever C766 for improved lubrication.17th Nov 1911Box 20 \ 3  Scan009
Meeting minutes discussing the design of the C711 Clutch Trunnion socket link regarding clearance of the ball end.29th Nov 1911Box 20 \ 3  Scan010
Meeting minutes discussing a lubricating hole for a clutch lever and a clutch cone from an external supplier.6th Dec 1911Box 20 \ 3  Scan011
Meeting minutes concerning cone clutch noise, lubrication issues, and material supplied by the Scandinavian Belting Company.8th Dec 1911Box 20 \ 3  Scan012
Committee discussion on the Cone Clutch, prioritizing the lubrication of the leather clutch.15th Dec 1911Box 20 \ 3  Scan013
To Mr Spinney about standardizing the flats cut on a clutch trunnion ball socket link.15th Dec 1911Box 20 \ 3  Scan014
Copy of a meeting minute regarding the design of a C711 Clutch trunnion socket link.19th Dec 1911Box 20 \ 3  Scan015
Meeting minutes discussing the clearance in a clutch trunnion socket link and the evaluation of Renault and Crossley clutch designs.8th Jan 1912Box 20 \ 3  Scan016
Request to review the layout of the Clutch Trunnion Socket Link C711 regarding its clearance and bearing surface.8th Jan 1912Box 20 \ 3  Scan017
Departmental memo regarding a broken part from The Hon. E.S. Montagu, requesting an examination for a possible free of charge replacement.15th Feb 1912Box 20 \ 3  Scan018
Broken pieces of a ball case for a clutch trunnion, requesting an examination and report.14th Feb 1912Box 20 \ 3  Scan019
Clutch rivets catching, despite being countersunk.10th Jul 1912Box 20 \ 3  Scan020
Departmental memo chasing an overdue report from Mr Wormald regarding a broken clutch trunnion for Chassis 1331.21th Feb 1912Box 20 \ 3  Scan021
Failure of a socket bolt and arranging a technical committee meeting.22th Feb 1912Box 20 \ 3  Scan022
Departmental memo discussing the lubrication of trunion ball races and suggesting improvements.29th Mar 1912Box 20 \ 3  Scan023
Letter from F.H. Royce regarding the possibilities of using magnetic clutches in change speed boxes.24th Jun 1912Box 20 \ 3  Scan024
Departmental memo regarding a potential rectification of a clutch to be reviewed by the designers.3rd Jul 1912Box 20 \ 3  Scan025
Dirt accumulation in the flywheel guard and potential modifications to prevent clutch failure.8th Jul 1912Box 20 \ 3  Scan026
The probable cause of clutch heating and a plan for its replacement.25th Jul 1912Box 20 \ 3  Scan027
Report concerning changing the leather clutch to a fabric one on Chassis 1378 for Mrs Fitzgerald.25th Jul 1912Box 20 \ 3  Scan028
Requesting information on single plate clutches of the De Dion type.25th Jul 1912Box 20 \ 3  Scan029
To Mr. Royce regarding research into single plate clutches from competitor cars.30th Jul 1912Box 20 \ 3  Scan030
The concluding page of a typed document signed by T.S. Mercer.13th Aug 1912Box 20 \ 3  Scan031
To Mr. Royce regarding descriptions of Panhard, De Dion, and Arrol-Johnston plate clutches.13th Aug 1912Box 20 \ 3  Scan032
Small diameter clutch, noting vibration issues at certain speeds.14th Aug 1912Box 20 \ 3  Scan033
Recommendation to adopt steel clutch rings as standard following successful experimental testing.20th Aug 1912Box 20 \ 3  Scan034
The successful testing of steel clutch rings, leading to their approval for standard use.21th Aug 1912Box 20 \ 3  Scan035
Note confirming the standard use of steel clutch rings following successful testing.21th Aug 1912Box 20 \ 3  Scan036
From F.H.R. (Frederick Henry Royce) expressing satisfaction with the results of cone clutch tests on steel clutch rings.23th Aug 1912Box 20 \ 3  Scan037
The standardization of steel clutch rings for cone clutches, quoting Mr. Royce.26th Aug 1912Box 20 \ 3  Scan038
To Mr Johnson regarding a press cutting about cone clutches.27th Aug 1912Box 20 \ 3  Scan039
To Mr Bailey regarding a report from Mr Hives about steel rivets on a clutch cone showing wear on chassis 1926.26th Sep 1912Box 20 \ 3  Scan040
Extract from Mr. Platford's report on cars in the Spanish Grand Prix regarding the clutch.17th Sep 1914Box 20 \ 3  Scan041
Technical description and critique of an expanding band type clutch and a note on the gearbox.24th Nov 1913Box 20 \ 3  Scan042
Axle 'periods' or vibrations on test cars, identifying a potential solution by using a damped spring type engine coupling.7th Feb 1914Box 20 \ 3  Scan043
Issue of 'jaggering' clutches and the effect of different engine couplings and oiling.7th Feb 1914Box 20 \ 3  Scan044
Car's clutch-related 'jaggering' trouble and the resulting strain on the chassis and transmission.7th Feb 1914Box 20 \ 3  Scan045
'axle period' issue, the refusal to pass axles with this fault, and potential solutions involving different coupling types.7th Feb 1914Box 20 \ 3  Scan046
Whether to continue sending out cars until a permanent cure for an issue is found, referencing double brake axles.7th Feb 1914Box 20 \ 3  Scan047
Clarification regarding Mr. Platford's intentions about passing axles to avoid misunderstanding.7th Feb 1914Box 20 \ 3  Scan048
Issue of axle periods and seeking a decision on engine coupling types.10th Sep 1936Box 20 \ 3  Scan049
Studying a damped spring type engine coupling to solve clutch 'jaggering' issues without stopping output.10th Sep 1936Box 20 \ 3  Scan050
Use of a damped spring type coupling to cure jaggering clutches and vibration.10th Sep 1936Box 20 \ 3  Scan051
Issues with axle 'periods' and 'jaggering' clutches, and further experimental work.12th Feb 1914Box 20 \ 3  Scan052
To Mr Hives requesting a report on axle periods and jaggering clutches.12th Feb 1914Box 20 \ 3  Scan053
To Mr Johnson regarding issues with axle periods and clutch jaggering, recommending against spring couplings and proposing further experiments.17th Feb 1914Box 20 \ 3  Scan054
To Mr Johnson about issues with axle periods and jaggering clutches.17th Feb 1914Box 20 \ 3  Scan055
Note on clutch jaggering, its cause, cure, and the consequences for the spring coupling.9th Sep 1916Box 20 \ 3  Scan056
Extract concerning the poor performance of the clutch in chassis 7-CA, comparing it to model 49-GB.9th Sep 1916Box 20 \ 3  Scan057
Inquiring about the details of the E. Baudaux patent clutch.8th May 1919Box 20 \ 3  Scan058
Test results for 'Mex' Spirit on bench engine X976.21th Jul 1909Box 20 \ 4  Scan001
Bench engine test results for 'Rupidin' spirit fuel.21th Jul 1909Box 20 \ 4  Scan002
Porcelain soot condition and jet settings.2nd May 1914Box 20 \ 4  Scan003
Customer query on the exclusive use of 'Mex'.2nd May 1914Box 20 \ 4  Scan004
Internal memorandum clarifying the use of Mex Spirit versus the superior Shell No.1 Spirit for testing cars.6th May 1914Box 20 \ 4  Scan005
Giving an opinion on a cheaper but equally good alternative.23th Feb 1914Box 20 \ 4  Scan006
Clarifying the use of Mex Spirit versus Shell No. 1 Spirit for vehicle testing purposes.8th May 1914Box 20 \ 4  Scan007
Relative effectiveness and engine detonation issues between 'Mex' and 'Pratt's' spirits.30th Jun 1914Box 20 \ 4  Scan008


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