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
Engineering committee meeting report on engine lubrication and piston issues.10th Mar 1926Box 16 \ 1  Scan102
Engine performance issues including wristpin fits, city driving complaints, and oil suitability.10th Mar 1926Box 16 \ 1  Scan103
Engine adjustments relating to pilot jets, oil pressure, and extra oil supply.10th Mar 1926Box 16 \ 1  Scan104
The factors controlling overoiling on Phantom engines compared to Silver Ghost engines.4th May 1926Box 16 \ 1  Scan105
Report analyzing oil consumption in relation to oil flow through bearings, with comparative data for Silver Ghost and Phantom cars.4th May 1926Box 16 \ 1  Scan106
Comparison of oil consumption and pressure between the Silver Ghost and Phantom models, attributing differences to bearing clearances.4th May 1926Box 16 \ 1  Scan107
Comparison of oil flow between the Silver Ghost and Phantom models and the methods for reducing excessive oil flow.4th May 1926Box 16 \ 1  Scan108
Engine testing results, focusing on oil flow, piston lubrication, and the effectiveness of 'L' section piston rings.4th May 1926Box 16 \ 1  Scan109
Summary of findings on engine oil consumption, exhaust smoke, and potential solutions.4th May 1926Box 16 \ 1  Scan110
High oil consumption in the Phantom engine, attributing the issue to the fit of bearings and piston rings.28th Jul 1930Box 16 \ 1  Scan111
Overoiling issue on PII S pistons and a potential solution.28th Jul 1930Box 16 \ 1  Scan112
Issue of over-oiling in English-built Phantom II chassis and the effectiveness of new piston rings and bleeder holes.2nd Jul 1930Box 16 \ 1  Scan113
Piston oil consumption improvements and the potential contributing factors.8th Jul 1930Box 16 \ 1  Scan114
Fitting Perfect Circle piston rings and drilling holes to address overoiling issues.30th Aug 1930Box 16 \ 1  Scan115
New scheme to prevent over-oiling during slow running by fitting improved Asbestos washers.30th Aug 1930Box 16 \ 1  Scan116
Dimensional changes to channel scraper rings to resolve an overoiling problem on Phantom II and 20/25HP chassis.7th Jan 1931Box 16 \ 1  Scan117
Page 2 of a letter from a customer, Stanley Johnson, detailing ongoing engine trouble and contrasting it with another vehicle.13th Jun 1910Box 16 \ 1  Scan118
Experiment card to determine the standard for piston rings, comparing plain versus double-ring types.13th Jun 1910Box 16 \ 1  Scan119
Departmental memo regarding a procedure to fix sticking piston rings using parrafin.16th Jul 1912Box 16 \ 1  Scan120
Departmental memo from E.P. suggesting a point be brought before other departments of the Company.3rd May 1912Box 16 \ 1  Scan121
Article from 'The Autocar' magazine discussing the design, manufacture, and efficiency of different types of piston rings.7th Sep 1912Box 16 \ 1  Scan122
Newspaper clipping detailing a pinned piston ring design and a custom wire tool for removal.21th Sep 1912Box 16 \ 1  Scan123
Potential fault with a piston ring pin in Lord Portarlington's car, number 2107.2nd Apr 1913Box 16 \ 1  Scan124
Chassis 2301, detailing the special double piston rings with a new locking device.22th Apr 1913Box 16 \ 1  Scan125
Works order memo regarding production cards and instruction sheets for Piston Rings.25th Apr 1913Box 16 \ 1  Scan126
Brake leverage, piston design, engine rings, and balance weights for a new car series.5th May 1913Box 16 \ 1  Scan127
Remark regarding the production of pip locking piston rings for pistons X.294.10th Jun 1913Box 16 \ 1  Scan128
Adoption of parallel piston rings for aero and car engines.31th Dec 1914Box 16 \ 1  Scan129
Query regarding the best type of piston rings to use.5th Oct 1915Box 16 \ 1  Scan130
Extract concerning a 10,000-mile bench test for piston rings.21th Jul 1914Box 16 \ 1  Scan131
Alteration to a piston ring drawing to specify clearance for shop practice.21th Jul 1914Box 16 \ 1  Scan132
Suitability of engine oil for the Australian climate, based on a report.13th Oct 1915Box 16 \ 1  Scan133
Letter from L.C. Harvey regarding the supply and testing of 'Wedgerite' piston rings.23th Mar 1921Box 16 \ 1  Scan134
Advertisement for Wedgerite Piston Rings which expand in width as well as in diameter.23th Mar 1921Box 16 \ 1  Scan135
Retail price list and promotional leaflet for WedgeRite Piston Rings, including a diagram of its function.2nd Aug 1921Box 16 \ 1  Scan136
Letter from supplier Morris, Russell about a new patented scraper piston ring.2nd Aug 1921Box 16 \ 1  Scan137
Letter from Wellworthy Ltd. to the Technical Dept. regarding their patented piston rings, enclosing a small pamphlet and a newspaper clipping.11th Nov 1921Box 16 \ 1  Scan138
Advertisement for Wellworthy Universal Radially Direct Pressure Piston Rings.11th Nov 1921Box 16 \ 1  Scan139
From Wellworthy Limited detailing the importance, manufacturing challenges, and development of the piston ring.15th Sep 1922Box 16 \ 1  Scan140
New method from the American division for dealing with piston ring stops on the 40/50 chassis.15th Sep 1922Box 16 \ 1  Scan141
Springfield plant's decision to stop pinning pistons, contrasting it with the standard Derby practice.28th Nov 1922Box 16 \ 1  Scan142
The American practice of fixing piston ring stops to resolve over-oiling issues.29th Dec 1922Box 16 \ 1  Scan143
Springfield's return to the standard system for pinning piston rings and demanding an inquiry into the unauthorized deviation.1st Feb 1923Box 16 \ 1  Scan144
Letter discussing the trial of a special piston ring for the 40/50 chassis, manufactured by Clews Peterson & Co.4th Apr 1923Box 16 \ 1  Scan145
Customer complaint letter detailing a recurring ring trouble issue and extensive repair history for Chassis No. 23-PB.30th Aug 1923Box 16 \ 1  Scan146
Piston ring knocks on pre-war chassis and the compatibility of pre-war pistons with post-war rings.4th Sep 1923Box 16 \ 1  Scan147
Experiments and solutions for piston ring knock on a pre-war chassis.4th Sep 1923Box 16 \ 1  Scan148
French language bulletin on piston modifications for the installation of R.H. oil control rings, with diagrams and a table of dimensions.5th Sep 1923Box 16 \ 1  Scan149
Proposing experiments to investigate and resolve piston ring knock issues.5th Sep 1923Box 16 \ 1  Scan150
Experiments with post-war piston rings to resolve ring clap issues on pre-war pistons.24th Sep 1923Box 16 \ 1  Scan151
The incompatibility of post-war aluminium pistons with pre-war connecting rods to cure piston ring clap for Chassis 41-NA.17th Nov 1923Box 16 \ 1  Scan152
Piston clap issues and various component breakages in pre-war and post-war cars.14th Nov 1923Box 16 \ 1  Scan153
The causes of troubles with aluminium pistons versus cast iron pistons, focusing on gas leakage.7th Nov 1923Box 16 \ 1  Scan154
Chasing a decision from an individual regarding 'Piston Ring Clap'.7th Nov 1923Box 16 \ 1  Scan155
Customer complaint regarding piston ring clap on Chassis 23-PB.22th Oct 1923Box 16 \ 1  Scan156
Chasing a reply from CJ regarding a proposal on 'Piston Ring Clap'.11th Oct 1923Box 16 \ 1  Scan157
Chasing for instructions regarding a 'Piston Ring Clap' issue due to pressure from car owners.6th Oct 1923Box 16 \ 1  Scan158
Proposal to resolve piston ring clap issues in pre-war engines by fitting post-war narrow rings.26th Sep 1923Box 16 \ 1  Scan159
Experiments on post-war piston rings fitted to pre-war pistons to resolve complaints about ring clap.24th Sep 1923Box 16 \ 1  Scan160
Proposal for a series of experiments to investigate and resolve the issue of piston ring knocks.5th Sep 1923Box 16 \ 1  Scan161
Piston knocks on pre-war chassis, specifically about using pre-war cast-iron pistons.4th Sep 1923Box 16 \ 1  Scan162
Issue of piston ring knock in pre-war engines after an overhaul.29th Aug 1923Box 16 \ 1  Scan163
Roy to Hs seeking confirmation on a draft reply to the British Piston Ring Company.7th Jan 1924Box 16 \ 1  Scan164
Letter to The British Piston Ring Co. Ltd. regarding the supply and testing of heat-formed lapped rings.7th Jan 1924Box 16 \ 1  Scan165
From B.J. to Hs. requesting an update on issues with lubricating oils.1st Oct 1924Box 16 \ 1  Scan166
Promotional letter from R. A. Rothermel, Ltd. regarding their PERFECT CIRCLE Oil Regulating Ring.24th Nov 1924Box 16 \ 1  Scan167
Page 2 of a letter from R. A. Rothermel, Ltd. offering sample engine rings and guaranteeing improved performance.18th Dec 1924Box 16 \ 1  Scan168
Procurement and testing of 'Perfect Circle Scraper Rings' on car and aero engines.18th Dec 1924Box 16 \ 1  Scan169
Piston design, oil consumption, and potential solutions for component failure.23th Mar 1925Box 16 \ 1  Scan170
Patent application for oil scraper rings, particularly the attribution of the 'L' section ring design.27th Mar 1925Box 16 \ 1  Scan171
Laboratory report on engine lubrication, detailing experiments with mineral oils and fatty acids.24th Jun 1925Box 16 \ 1  Scan172
Letter to Messrs. R.A. Rothermel Ltd. requesting a quotation and availability for 'Perfect Circle Scraper rings'.18th Sep 1925Box 16 \ 1  Scan173
Letter from a supplier confirming the manufacture of 'Perfect Circle Oil Regulating Rings' based on provided blueprints.21th Sep 1925Box 16 \ 1  Scan174
Comparing the oil scraping performance and accuracy of Wellworthy and Brico piston rings.21th Oct 1925Box 16 \ 1  Scan175
Comparing the poor performance of 'Wellworthy' piston rings with the superior 'Brico' rings, and recommending a change in supply.21th Oct 1925Box 16 \ 1  Scan176
Proposal to modify the grinding of Wellworthy piston rings, with a comparison to Brico rings.21th Oct 1925Box 16 \ 1  Scan177
Clear marking of components fitted with 'Wellworthy' rings for testing.21th Oct 1925Box 16 \ 1  Scan178
Advice note from R. A. Rothermel, Ltd. for the supply of oil regulating and compression piston rings.7th Dec 1925Box 16 \ 1  Scan179
Order for oil regulating and compression piston rings.3rd Mar 1926Box 16 \ 1  Scan180
Tests investigating the effect of piston ring clearance on gumming up tendencies in a Phantom engine.18th Nov 1926Box 16 \ 1  Scan181
Test results on piston ring groove clearance and carbon build-up.19th Nov 1926Box 16 \ 1  Scan182
The influence of stiff versus weak piston rings on 'gumming up' within the grooves of a Phantom engine.19th Nov 1926Box 16 \ 1  Scan183
Page concluding the results of tests on piston ring gumming tendency and stiffness.31th Mar 1927Box 16 \ 1  Scan184
Design of scraper rings for engines.31th Mar 1927Box 16 \ 1  Scan185
Graph plotting oil flow through bearings against engine RPM for car 12.EX.2nd May 1927Box 16 \ 1  Scan186
Use of tapered piston rings as oil scrapers and their effect on oil consumption.2nd May 1927Box 16 \ 1  Scan187
Oil consumption experiment on a Phantom test bench engine comparing standard versus upward sloping drain holes.9th May 1927Box 16 \ 1  Scan188
Instructions and considerations for piston design, addressing issues like gummed pistons and oil consumption.23th May 1927Box 16 \ 1  Scan189
Instructions for the correct fitting of piston rings for automobile and aviation engines, by Amédée Bollée.23th May 1927Box 16 \ 1  Scan190
Advertisement for the Amédée Bollée special vice for adjusting oblique-cut piston rings.23th May 1927Box 16 \ 1  Scan191
Advertisement leaflet for Amédée Bollée double scraper piston rings.23th May 1927Box 16 \ 1  Scan192
Technical leaflet for Amédée Bollée scraper piston rings, detailing different types, their advantages, and a list of clients.1st Apr 1927Box 16 \ 1  Scan193
French product sheet for 'Amédée Bollée' piston rings, detailing specifications and fitting instructions.1st Apr 1927Box 16 \ 1  Scan194
'Perfect Circle Piston Rings' and arranging an interview with Mr. Potter.15th Jul 1927Box 16 \ 1  Scan195
Letter asking for clarification on the standardization of Perfect Circle piston rings.20th Oct 1927Box 16 \ 1  Scan196
Use and effectiveness of 'The Perfect Circle' piston rings on aero and Phantom engines.22th Oct 1927Box 16 \ 1  Scan197
The trial and potential adoption of Perfect Circle piston rings.7th Nov 1927Box 16 \ 1  Scan198
Installation instructions for Dubois Oilproof Rings on pistons.9th Nov 1927Box 16 \ 1  Scan199
Letter from DuBois Machine Company to the Chief Engineer proposing their new Combination Oilproof Ring.9th Nov 1927Box 16 \ 1  Scan200
Concluding page of a letter from DuBois Machine Company.11th Sep 1927Box 16 \ 1  Scan201


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