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
Graph showing the power increase due to lower depression in the induction pipe for a 20hp engine.30th Mar 1927Box 19 \ 7  Scan105
Blank page with a purple date stamp from Derby.1st Apr 1927Box 19 \ 7  Scan106
Graph showing the power increase in a 20 HP engine due to using larger valves.31th Mar 1927Box 19 \ 7  Scan107
Performance graph comparing standard vs. larger valves on a 20 HP engine.31th Mar 1927Box 19 \ 7  Scan108
Graph comparing Brake Horse Power and Brake Mean Effective Pressure of a standard 20HP engine against a modified version.1st Apr 1927Box 19 \ 7  Scan109
Stamped cover page from the Derby works.1st Apr 1927Box 19 \ 7  Scan110
Graph comparing gas velocity past standard and larger valves against engine RPM for a 20 HP engine.31th Mar 1927Box 19 \ 7  Scan111
Blueprint showing the arrangement of two Zenith carburettors on the 20 HP engine.1st Apr 1927Box 19 \ 7  Scan112
Page with a purple ink stamp in the bottom right corner, the main text is illegible.1st Apr 1927Box 19 \ 7  Scan113
Delivery of the 14-EX car and altering the engine compression ratio.10th May 1928Box 19 \ 7  Scan114
Revisions to the EAC.7 engine with dry and wet liners and requesting compression ratio information.24th May 1927Box 19 \ 7  Scan115
Recommending an increased compression ratio for general purpose cars using an aluminium engine.27th May 1927Box 19 \ 7  Scan116
Power and compression ratios for the F.2.B. series engine.7th Jun 1928Box 19 \ 7  Scan117
Confirming the policy that compression ratios on F.2.B. Series chassis will not be raised for customer delivery without testing by Sales officials and personal sanction.1st Jun 1928Box 19 \ 7  Scan118
Compression pressure test results for engine No. SS-3 at various RPMs.28th Sep 1928Box 19 \ 7  Scan119
Engine noise investigation, covering piston knock, rocker mechanism, timing gears, and valve mechanism issues.25th Sep 1928Box 19 \ 7  Scan120
Graph of compression pressures for a Super Sports Engine at various RPMs.25th Sep 1928Box 19 \ 7  Scan121
Blank document with a Print Room date stamp.28th Sep 1928Box 19 \ 7  Scan122
Graph showing Mechanical Efficiency and Friction Horse Power against R.P.M. for the Super Sports Engine No SS-3.25th Sep 1928Box 19 \ 7  Scan123
On engine compression experiments, torque reactions, and carburettor improvements for the EAC.10 chassis.17th Oct 1928Box 19 \ 7  Scan124
Issue of 'booming bodies' in limousines, potential solutions, and the impact of the turbulent head.12th Nov 1928Box 19 \ 7  Scan125
Modifications and performance of the 20 HP car 14-G4.23th Mar 1929Box 19 \ 7  Scan126
Modifying the India 1V engine cylinder head to address pre-ignition problems by altering the compression ratio.28th Mar 1929Box 19 \ 7  Scan127
Preignition issues, comparing the water cooling properties of cast iron and aluminium cylinder heads.28th Mar 1929Box 19 \ 7  Scan128
Engine preignition issues at a specific compression ratio and proposed testing methods.28th Mar 1929Box 19 \ 7  Scan129
Comparison of performance data for two cars during various hill climbs.10th Apr 1929Box 19 \ 7  Scan130
Ignition plug temperature, pre-ignition, and cooling issues on a 20 HP engine.10th Apr 1929Box 19 \ 7  Scan131
Proposed engine modifications regarding compression ratios, spark plug cooling, and ignition timing.10th Apr 1929Box 19 \ 7  Scan132
Conclusions from a cylinder head test regarding hot spots, compression ratios, and ignition plugs.18th Apr 1929Box 19 \ 7  Scan133
Tests regarding pre-ignition trouble on an India-4 turbulent head by comparing cylinder head temperatures.18th Apr 1929Box 19 \ 7  Scan134
The effects of pre-ignition on Dadia IV and cast iron engines, comparing turbulent and cast iron cylinder heads.18th Apr 1929Box 19 \ 7  Scan135
Spark plug suitability for high compression engines and issues with pre-ignition.18th Apr 1929Box 19 \ 7  Scan136
Summary of engine tests comparing aluminium and cast iron cylinder heads, focusing on temperature, pre-ignition, and compression ratios.21th Apr 1929Box 19 \ 7  Scan137
Diagram showing the position of thermocouples in an India IV cylinder head.21th Apr 1929Box 19 \ 7  Scan138
Heavily faded and almost entirely illegible document page with a purple date stamp.18th Apr 1929Box 19 \ 7  Scan139
Surprisingly low performance improvements of a 20 HP engine fitted with a new Turbulent Head.22th Apr 1929Box 19 \ 7  Scan140
Performance analysis of a 20 HP engine with a new turbulent head, comparing compression ratios and power increases.26th Apr 1929Box 19 \ 7  Scan141
Implementation of two compression ratios and improvements to the SS chassis.29th May 1929Box 19 \ 7  Scan142
Engine specifications including timing, power curve data, compression ratio, and clearance volume.11th Jul 1929Box 19 \ 7  Scan143
Measuring the S.S. combustion space clearance volume and calculating the compression ratio.15th Jul 1929Box 19 \ 7  Scan144
Testing a reduced compression ratio in an S.S. car engine for smoother operation.17th Jul 1929Box 19 \ 7  Scan145
Compression ratio tests and findings on test bed engines.9th Sep 1932Box 19 \ 7  Scan146
Comparative table of compression ratios and maximum brake horsepower for various car models from 1927 to 1929.9th Sep 1932Box 19 \ 7  Scan147
Comparative table of engine specifications (B.HP and Compression Ratio) for various car models from 1927 to 1929.9th Sep 1932Box 19 \ 7  Scan148
Comparative table of B.HP and Compression Ratios for various car makes from 1927 to 1929.29th Oct 1932Box 19 \ 7  Scan149
Cover note for sketch Hs.747 detailing a modification to the cylinder head compression ratio for the Peregrine engine.29th Oct 1932Box 19 \ 7  Scan150
Modification drawing for a cylinder head to reduce the compression ratio.28th Oct 1952Box 19 \ 7  Scan151
Heavily faded and damaged document with a purple ink stamp from the Print Room.29th Oct 1932Box 19 \ 7  Scan152
On clutch oiling, detailing an issue of oil loss and the results of a fix.2nd Jun 1906Box 20 \ 1  Scan001
Note on testing the oiling of a clutch spigot on engine 60525 and a related note on engine 60544.2nd Jun 1906Box 20 \ 1  Scan002
Abandoning an experiment to oil a clutch leather in favour of a cotton belting clutch.26th Mar 1912Box 20 \ 1  Scan003
Record card detailing tests on oil being fed to a clutch leather when disengaged.26th Mar 1912Box 20 \ 1  Scan004
Design request for a lubricator for the clutch trunnion or its lever to lubricate a ball race.18th Apr 1912Box 20 \ 1  Scan005
Report log regarding the lubrication of clutch trunnion ball races.20th Apr 1912Box 20 \ 1  Scan006
Information on clutch oiling procedures to instruct owners.20th Apr 1912Box 20 \ 1  Scan007
Oiling procedures for clutches and whether they should be 'blocked out of a night'.20th Apr 1912Box 20 \ 1  Scan008
The testing of multiple trials cars to obtain an average result.10th Feb 1914Box 20 \ 1  Scan009
Instructions for the lubrication and treatment of a fabric-lined cone clutch.10th Feb 1914Box 20 \ 1  Scan010
Instructions for lubricating a dry or squeaking clutch.10th Feb 1914Box 20 \ 1  Scan011
Responding to a request for a simplified guide on clutch lubrication, attaching a relevant report.10th Feb 1914Box 20 \ 1  Scan012
Proposed note for the Instruction Book on how to remedy squeaky clutches.18th Feb 1914Box 20 \ 1  Scan013
Instructions for clutch lubrication and suitability for inclusion in the instruction book.19th Feb 1914Box 20 \ 1  Scan014
Request for a note to be inserted into the instruction book on how to remedy squeaky clutches.24th Feb 1914Box 20 \ 1  Scan015
Follow-up request for an opinion on a suggested paragraph for an instruction book regarding clutch lubrication.25th Feb 1914Box 20 \ 1  Scan016
Wording and suitability of an article on clutch lubrication for an instruction book.25th Feb 1914Box 20 \ 1  Scan017
Improvements for cone clutches, focusing on oil retention, suitable oil types, and the practice of propping clutches out.13th Jul 1914Box 20 \ 1  Scan018
Potential changes to the clutch instruction book regarding cleaning with paraffin and oil levels.20th Jul 1914Box 20 \ 1  Scan019
Appropriate oil viscosity for the clutch and its impact on the instruction book.20th Jul 1914Box 20 \ 1  Scan020
Criticism on Mr. Royce's memo R11/P20714 regarding an instruction book.21th Jul 1914Box 20 \ 1  Scan021
Technical letter regarding clutch operation, specifically the effects of using oil and paraffin.22th Jul 1914Box 20 \ 1  Scan022
Lubrication of a clutch, forwarding a report to Mr Royce.23th Jul 1914Box 20 \ 1  Scan023
Proposing changes to the clutch lubrication section of the Instruction Book.27th Jul 1914Box 20 \ 1  Scan024
Use of a graphite-lubricated plate clutch for Mr. Williamson's chassis, including an extract from his letter.13th Nov 1914Box 20 \ 1  Scan025
Experiments with Mr. Williamson's Chassis, noting that oil was not a success.23th Oct 1914Box 20 \ 1  Scan026
Notice concerning clutch over-oiling issues due to incorrect fitting on cars at the Derby factory.8th Jun 1921Box 20 \ 1  Scan027
Letter discussing tests and concerns regarding the lubrication of a clutch spigot.7th Feb 1923Box 20 \ 1  Scan028
Test report detailing various methods for oiling a clutch spigot.14th Feb 1923Box 20 \ 1  Scan029
Test report page detailing modifications and results for clutch spigot lubrication issues, numbered tests 8 through 14.14th Feb 1923Box 20 \ 1  Scan030
Test results for oil lubrication of a clutch spigot and flywheel assembly.27th Feb 1923Box 20 \ 1  Scan031
Letter from the Springfield, MA office to Derby, England regarding the lubrication of the clutch spigot.27th Feb 1923Box 20 \ 1  Scan032
Letter discussing the history, issues, and design changes related to the lubrication of the clutch spigot.27th Feb 1928Box 20 \ 1  Scan033
Technical note discussing clutch and spigot lubrication, and remedies for overoiling issues.20th Mar 1923Box 20 \ 1  Scan034
New scheme for lubricating the clutch spigot using a syringe instead of the automatic system.20th Mar 1923Box 20 \ 1  Scan035
Recommendation to adopt a scheme for an oil pipe to lubricate the clutch spigot.9th Apr 1923Box 20 \ 1  Scan036
Replacing the automatic lubrication system for the clutch spigot with hand oiling.9th Apr 1923Box 20 \ 1  Scan037
Issues with the 40/50 HP clutch spigot lubrication and a new scheme being tested.10th May 1923Box 20 \ 1  Scan038
Disagreeing with altering the 40/50 clutch spigot lubrication from the standard valve and wick pattern.17th May 1923Box 20 \ 1  Scan039
Commenting on American Proposal Sheet No.41 regarding the lubrication of a clutch spigot bearing.19th Nov 1924Box 20 \ 1  Scan040
Technical memo discussing modifications to the clutch lubrication procedure detailed in Depot Sheet No. Hm. 25 for Phantom and 20 HP chassis.24th Feb 1927Box 20 \ 1  Scan041
Instructions for lubricating the clutch on a Phantom model.29th Aug 1928Box 20 \ 1  Scan042
Instructions for the lubrication of the single plate clutch for the Phantom model.28th Feb 1927Box 20 \ 1  Scan043
Excessive oil supply to the clutch trunnion and servo cams, requesting an alteration to the lubrication system.14th Aug 1929Box 20 \ 1  Scan044
Issues and testing related to the lubrication of the Phantom II clutch.30th Oct 1929Box 20 \ 1  Scan045
New scheme for the automatic lubrication of the Phantom II clutch spigot bearing from the gearbox.6th Nov 1929Box 20 \ 1  Scan046
Modifications for the automatic lubrication of the 'Japan' clutch spigot bearing on a 20/25 HP model.1st Nov 1923Box 20 \ 1  Scan047
Lubrication issues with the S.S. Clutch and the resulting modifications.3rd Nov 1929Box 20 \ 1  Scan048
Clutch oiling tests, focusing on the collector ring, Ferodo surfaces, and modifications to floating ball bearings.1st Nov 1929Box 20 \ 1  Scan049
Modifications to a lubrication scheme and clutch assembly.1st Nov 1929Box 20 \ 1  Scan050
Blueprint of the oiling scheme for an S.S. clutch.8th Nov 1929Box 20 \ 1  Scan051
Mostly blank, folded page with a 'Print Room' date stamp in the bottom right corner.13th Nov 1928Box 20 \ 1  Scan052


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