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
Report analysing lost pedal movement in a rear braking system, including a table of deflection measurements and a blueprint of the linkage.28th Jan 1927Box 15 \ 2  Scan007
Test report comparing pedal travel lost in the rear axle linkage for the 40/50 HP and EAC.V11 car models.28th Jan 1927Box 15 \ 2  Scan008
Test report on the flexibility and twist of the EAC.Vll axle under braking torque, including data on lost movement due to elasticity.28th Jan 1927Box 15 \ 2  Scan009
Diagram illustrating axle torsional movement and its effect on brake pedal travel.23th Dec 1927Box 15 \ 2  Scan010
Drawings for the arrangement of clutch and brake pedals, and alternative schemes for the clutch pedal stop.23th Dec 1927Box 15 \ 2  Scan011
Revised pedal support, awaiting comments before further detailing.15th Feb 1928Box 15 \ 2  Scan012
Centralised chassis lubrication for the front brake differential shaft, pedals, and clutch operating shaft.26th May 1928Box 15 \ 2  Scan013
Modifications for 'E' type steering on the G.2.B. series Phantom.14th Jun 1928Box 15 \ 2  Scan014
The design of 'SS' pedals, cancelling the 'B' type and proposing new 'C' type pedals.28th Aug 1928Box 15 \ 2  Scan015
Query regarding the reduction in diameter of a foot pedal stem and concerns about material hardness after brazing.6th Nov 1928Box 15 \ 2  Scan016
Alignment of the S.S. chassis pedals with the 20 HP chassis, noting material and dimension considerations.6th Nov 1928Box 15 \ 2  Scan017
Requesting particulars of the steering and pedals for experimental cars 21-EX, 22-EX, and 23-EX.12th Nov 1928Box 15 \ 2  Scan018
Changes to the 'SS' Bijur lubrication system, specifically for the accelerator pedal and oil pipes.28th Nov 1928Box 15 \ 2  Scan019
Poor braking on car 18-EX, questioning if changes were made to the leverages.4th Dec 1928Box 15 \ 2  Scan020
Proposal to adopt the 20 HP pedal mounting for the Phantom II to resolve clutch pedal issues and standardize parts.28th Apr 1930Box 15 \ 2  Scan021
Seating positions, cushion dimensions, and pedal adjustments for different driver sizes.29th May 1930Box 15 \ 2  Scan022
Modifications made to the 'F' type pedals for the continental car 26-EX.14th Jun 1930Box 15 \ 2  Scan023
Modifications and testing of adjustable pedals for the R.H. P.2 model.17th Jun 1930Box 15 \ 2  Scan024
Tests of completed cars, specifically regarding an issue with bending P.2 pedal stems and a proposed improvement.26th Jun 1930Box 15 \ 2  Scan025
Extract from a report on tests of completed cars, detailing an experimental increase in pedal stem diameter.5th Jul 1930Box 15 \ 2  Scan026
Inquiry requesting the state of progress for three experiments concerning adjustable pedal stems and bonnet modifications.11th Oct 1930Box 15 \ 2  Scan027
Replying to a query about the status of experiments on pedal stems, bonnet hinges, and bonnet modifications.13th Oct 1930Box 15 \ 2  Scan028
Standardisation of chassis parts, specifically adjustable pedal stems.18th Oct 1930Box 15 \ 2  Scan029
Standardisation form for chassis part X M 470, detailing alterations, costs, and required approvals.30th Oct 1930Box 15 \ 2  Scan030
Standardisation of adjustable pedals for P.2 'OZ' Series and confirming no design for the 20/25 HP.20th Jul 1931Box 15 \ 2  Scan031
Investigating a complaint about noise caused by pedal movement from the Diamond engine mounting and proposing solutions.24th Nov 1931Box 15 \ 2  Scan032
Query regarding the stiffness and steadiness of the pedals and wheel carrier on the 20-EX Chassis.6th Apr 1932Box 15 \ 2  Scan033
Excessive fidgeting of the new canti-lever clutch pedal and the proposed solution.17th Jun 1932Box 15 \ 2  Scan034
Optimising the clutch pedal angle, noting differences between the L.H. and R.H. chassis.18th Jun 1932Box 15 \ 2  Scan035
Modification to the Phantom II clutch pedal to give greater separation, including a reference to a blueprint.23th Jun 1932Box 15 \ 2  Scan036
Standardisation of a clutch pedal with a spring washer and collar fitted to the bearing.12th Aug 1932Box 15 \ 2  Scan037
Standardisation document for chassis parts concerning the petrol filler cap and boot dust proofing.12th Sep 1938Box 15 \ 2  Scan038
From Mr. Royce requesting the fitting of the latest type flexible skirt pistons to specific chassis.30th Dec 1925Box 15 \ 3  Scan001
Flexibility test performed on pedestal pistons compared to standard pistons.12th Oct 1926Box 15 \ 3  Scan002
Piston flexibility tests, including a diagram of the test rig and a table of results.10th Oct 1927Box 15 \ 3  Scan003
Test report on a Phantom engine investigating the relationship between piston friction and overrun vibrations.10th Oct 1927Box 15 \ 3  Scan004
Drawings for 'Y' metal pistons for EAC.10 and 14.28th Nov 1927Box 15 \ 3  Scan005
Use of EAC.10 & 14 die-cast pistons for production and sporting Phantom models.29th Nov 1927Box 15 \ 3  Scan006
Piston pin lubrication methods and suggesting experimental modifications.9th Dec 1927Box 15 \ 3  Scan007
From E. to B.J. Hs. regarding Mr. Royce's requested modifications to a cross web piston design.13th Dec 1927Box 15 \ 3  Scan008
Trialling sand cast pistons made from Hall's Special Alloy for the 12-EX and a bench test engine.26th Jan 1928Box 15 \ 3  Scan009
Comparing cross web and diagonal web piston designs, concluding the diagonal web piston is the superior design for car work.18th Feb 1928Box 15 \ 3  Scan010
Recommending a material change for piston pins from casehardened steel to high duty alloy steel.15th Mar 1928Box 15 \ 3  Scan011
The material properties and fatigue testing of piston pins for aero and car engines.4th Jul 1928Box 15 \ 3  Scan012
Two types of pistons for a 10,000-mile Phantom engine test.1st May 1928Box 15 \ 3  Scan013
Single bolt pedestal pistons with a lower scraper ring for Phantom and EAC.10 models.1st May 1928Box 15 \ 3  Scan014
Design and development of new experimental 20 HP pistons, including a novel design with an invar ring.20th Jul 1928Box 15 \ 3  Scan015
Modifications to Phantom piston rings to increase cylinder wall pressure.23th Jul 1928Box 15 \ 3  Scan016
From Royce to Hives regarding piston ring solutions for Twenty HP and Phantom models.23th Jul 1928Box 15 \ 3  Scan017
Telegram suggesting engine modifications, including specific types of rings and altered oil grooves in bearings.23th Jul 1926Box 15 \ 3  Scan018
Telegram concerning piston rings for the 20 horsepower and Phantom models.23th Jul 1928Box 15 \ 3  Scan019
Post Office Telegraph form with a handwritten message from Royce.23th Jul 1928Box 15 \ 3  Scan020
Fitting and testing pistons and rings for the 20 HP and Phantom engines.25th Jul 1928Box 15 \ 3  Scan021
Requesting a set of 'Perfect Circle' piston rings for a Phantom engine, with a preference for a 45° joint.31th Aug 1928Box 15 \ 3  Scan022
Running experience and performance issues of single bolt pedestal pistons, specifically concerning piston knock and gas leakage.12th Oct 1928Box 15 \ 3  Scan023
Engine lubrication, seizure risks after cold starts, and piston design improvements.12th Oct 1928Box 15 \ 3  Scan024
The optimal number of piston rings to prevent blow past and a proposal for a new piston design test.10th Oct 1928Box 15 \ 3  Scan025
Design and specifications for pistons and their rings.10th Oct 1928Box 15 \ 3  Scan026
Specification document detailing the features and dimensions of pistons for the Phantom and 20 HP chassis.2nd Nov 1928Box 15 \ 3  Scan027
Testing of two different piston types for the 'SS' engine.2nd Nov 1928Box 15 \ 3  Scan028
Modifications for the G.4 engine crankcase and 4-point mounting.23th Apr 1929Box 15 \ 3  Scan029
Piston knocks in F.2-B series engines, attributing the cause to temporary piston seizure from lack of lubrication on cold starts.30th Apr 1929Box 15 \ 3  Scan030
The design objectives and features of SS. Invar Strut Pistons.27th Jun 1929Box 15 \ 3  Scan031
Modification to S.S. pistons, lengthening the skirt by .375 inches to resolve issues with piston slap.12th Jul 1929Box 15 \ 3  Scan032
Car with defective pistons sent for repair and feedback on the performance of a 20 HP engine.16th Jul 1929Box 15 \ 3  Scan033
Inquiring about the production status of various car pistons.17th Sep 1929Box 15 \ 3  Scan034
Report outlining the designs and features of various car pistons.4th Oct 1929Box 15 \ 3  Scan035
Specifications and features for various piston designs, detailing alterations, ring arrangements, and gudgeon pin fixings.16th Jul 1928Box 15 \ 3  Scan036
The test results of Invar pistons on a Phantom 11 engine.13th Nov 1929Box 15 \ 3  Scan037
Order for a set of Phantom pistons with two spares, specifying magnesium instead of aluminium.3rd Dec 1929Box 15 \ 3  Scan038
Test bed running and clearances for Invar pistons in a Phantom II engine.27th Dec 1929Box 15 \ 3  Scan039
Clearances and hot testing procedures for pads on a test bed.24th Dec 1929Box 15 \ 3  Scan040
Blueprint showing a cross-section of a piston with an Invar strut, indicating where it tightens in the bore.24th Dec 1929Box 15 \ 3  Scan041
Test bed results for Phantom II Invar pistons, detailing issues with clearances and cold knocks.15th Jan 1930Box 15 \ 3  Scan042
Piston design, comparing issues with standard aluminium and cast iron pistons, and the need for flexibility.23th Jan 1930Box 15 \ 3  Scan043
Modifying Phantom II Invar pistons to introduce flexibility for a better fit.23th Jan 1930Box 15 \ 3  Scan044
The satisfactory testing of pistons made from R.R.53 material for Phantom II and 20/25 HP models, requesting a new standardisation sheet.2nd Sep 1930Box 15 \ 3  Scan045
Questioning the standardisation of pistons made in RR.50 alloy without a 10,000-mile test.29th Sep 1930Box 15 \ 3  Scan046
The decision to production test pistons made from R.R.50 alloy.3rd Oct 1930Box 15 \ 3  Scan047
Standardisation of chassis parts, proposing a change of piston material from alloy No. 221 to RR. 53.4th Sep 1930Box 15 \ 3  Scan048
Proposing an increase in the dimensions of Phantom II pistons to combat 'cold knocks' and extend piston life.29th Dec 1930Box 15 \ 3  Scan049
Redesign of the P.2 piston by increasing its length and testing a new design.10th Jan 1931Box 15 \ 3  Scan050
Short memo forwarding a note from Mx and proposing a test for an item with more bearing area.14th Jan 1931Box 15 \ 3  Scan051
Quarterly complaints regarding Phantom II pistons, suggesting an increase in piston length.5th Jan 1931Box 15 \ 3  Scan052
Longer experimental pistons for the P. 2. model, with illustrations and design suggestions.20th Jan 1931Box 15 \ 3  Scan053
Testing longer pistons for the Phantom II engine to address piston 'slap'.1st Apr 1931Box 15 \ 3  Scan054
Asking about the severity of piston knocks on the Phantom II and if extra oil would help.16th Apr 1931Box 15 \ 3  Scan055
Customer complaints and potential solutions for piston knock and brake squeaks on Phantom II cars.21th Apr 1931Box 15 \ 3  Scan056
Issues and modifications concerning the clutch, front shock dampers, and high tension wires.21th Apr 1931Box 15 \ 3  Scan057
Standardisation proposal for a longer skirt piston to safeguard against piston knocks.17th Apr 1931Box 15 \ 3  Scan058
Merits and proposed changes to the practice of pinning piston rings for aero and car engines.24th May 1932Box 15 \ 3  Scan059
19-EX piston failures due to breaking piston stops and rapid ring wear at high speeds.1st Jul 1932Box 15 \ 3  Scan060
Experimental piston with stiffer rings for a Phantom II chassis.8th Jul 1932Box 15 \ 3  Scan061
Potential causes and investigations into piston failure.14th Jul 1932Box 15 \ 3  Scan062
Limitations of chassis engine pistons with spring skirts and proposing design improvements.11th May 1933Box 15 \ 3  Scan063
Modifications to a Phantom Piston, including a change to Staybrite steel for the stops.21th Apr 1934Box 15 \ 3  Scan064
Standardisation of parts for the 40/50 model, specifically deleting stops for scraper rings on pistons.16th Oct 1934Box 15 \ 3  Scan065
Standardisation of parts form detailing costs for extra jigs and tools for the 'U' series chassis.20th Oct 1934Box 15 \ 3  Scan066
Revised dashboard design, changing from a sheet metal construction to a casting for 'B' steering.8th Jan 1926Box 15 \ 4  Scan001
Use of a Mechanic's joint from the USA for the EAC.7 propeller shaft.2nd Feb 1926Box 15 \ 4  Scan002


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