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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Letter from Westinghouse regarding a trial of experimental Westinghouse Air Springs on a chassis.28th Sep 1926Box 43 \ 3  Scan025
Letter to Westinghouse Brake Co. Ltd. enquiring about fitting their air springs to a chassis.29th Sep 1926Box 43 \ 3  Scan026
Letter from Westinghouse Brake & Saxby Signal Company requesting chassis drawings regarding Westinghouse Air Springs.30th Sep 1926Box 43 \ 3  Scan027
The supply and arrangement of auxiliary air springs to be used in conjunction with leaf springs.5th Oct 1926Box 43 \ 3  Scan028
Letter to the Westinghouse Brake Co. Ltd. regarding drawings and testing of their Air Springs.5th Oct 1926Box 43 \ 3  Scan029
Letter concerning a missing drawing, number E.73699, for Westinghouse Air Springs.6th Oct 1926Box 43 \ 3  Scan030
Letter to the Westinghouse Brake Co. Ltd. about despatched drawings, one of which was incomplete.7th Oct 1926Box 43 \ 3  Scan031
Inter-office letter from the American branch to the English branch regarding communications with Westinghouse companies.8th Oct 1926Box 43 \ 3  Scan032
Letter from Rolls Royce of America to Rolls Royce Ltd regarding correspondence with Westinghouse companies.8th Oct 1926Box 43 \ 3  Scan033
Letter from Rolls Royce of America to Derby regarding Westinghouse Brake & Saxby Signal Company.8th Oct 1926Box 43 \ 3  Scan034
Letter from Westinghouse concerning the installation of air springs, including a blueprint and a photograph.10th Nov 1926Box 43 \ 3  Scan035
Photograph of a roadster equipped with Westinghouse Air Springs.10th Nov 1926Box 43 \ 3  Scan036
Photograph of a vintage sedan car, side profile.11th Nov 1926Box 43 \ 3  Scan037
Letter to The Westinghouse Brake Co. Ltd. discussing the experimental fitting of an air spring device and requesting modifications to the adaptors.11th Nov 1926Box 43 \ 3  Scan038
Letter from Westinghouse confirming a revised scheme that will not require cutting a car frame.16th Nov 1926Box 43 \ 3  Scan039
Letter from Westinghouse regarding a drawing for a chassis arrangement that avoids cutting the frame ends.26th Nov 1926Box 43 \ 3  Scan040
Letter to The Westinghouse Brake Co. Ltd. regarding a scheme for fitting parts to a car.27th Nov 1926Box 43 \ 3  Scan041
Letter from the Westinghouse Brake & Saxby Signal Company acknowledging a letter and arranging for parts to be sent.29th Nov 1926Box 43 \ 3  Scan042
Letter from the Westinghouse Brake & Saxby Signal Company regarding the trial of 'Highway' model air springs.18th Jan 1927Box 43 \ 3  Scan043
Spring suspension characteristics and testing.7th Feb 1927Box 43 \ 3  Scan044
Requesting an examination of the O'Neil Air Springs device.5th Mar 1927Box 43 \ 3  Scan045
Returning the specification for the O'Neill Air Spring with an opinion on its merits.8th Mar 1927Box 43 \ 3  Scan046
Comparing the O'Neill air suspension system with the Westinghouse and Lancia type suspensions.1st Mar 1927Box 43 \ 3  Scan047
Letter from Westinghouse Brake & Saxby Signal Co. Ltd. inquiring about the testing of previously supplied air springs.5th May 1927Box 43 \ 3  Scan048
Letter to The Westinghouse Brake Co. Ltd. regarding the testing of their air springs on a car.7th May 1927Box 43 \ 3  Scan049
Letter from Westinghouse Brake & Saxby Signal Company following up on loaned air springs for trial.3rd Jan 1928Box 43 \ 3  Scan050
Letter to The Westinghouse Brake Co. regarding a delay in testing air springs due to other urgent work.4th Jan 1928Box 43 \ 3  Scan051
Follow-up letter from Westinghouse Brake & Saxby Signal Company regarding feedback on a set of Air Springs.1st Aug 1928Box 43 \ 3  Scan052
Letter to The Westinghouse Brake Co. Ltd. regarding the status of testing their Air Springs.14th Aug 1923Box 43 \ 3  Scan053
Follow-up letter from a supplier requesting permission to invoice for air springs.15th Aug 1928Box 43 \ 3  Scan054
Returning two loaned air springs to The Westinghouse Brake Co.20th Aug 1928Box 43 \ 3  Scan055
Letter regarding the dispatch of two unused Air Springs to The Westinghouse Brake Co.20th Aug 1923Box 43 \ 3  Scan056
Blueprint detailing a 3-inch air spring installation for a Phantom model, showing modifications to the frame end.26th Oct 1926Box 43 \ 3  Scan057
Proposed alterations to cam forms and valve timing for Scheme 723.21th Jul 1926Box 43 \ 3  Scan058
Mr. Royce's remarks on temporary modifications to the Falcon 10 engine's cam forms.22th Jul 1926Box 43 \ 3  Scan059
Proposal to produce a new set of camshafts for experimentation.23th Jul 1926Box 43 \ 3  Scan060
Valve timing diagrams for the Falcon X engine with different clearances.23th Jul 1926Box 43 \ 3  Scan061
Comparing valve open diagrams of the Curtiss and F.10 engines, discussing high-lift and exhaust cams.12th Aug 1926Box 43 \ 3  Scan062
Valve lift diagram for the Curtiss D12 engine number 252.12th Aug 1926Box 43 \ 3  Scan063
The reverse of a document page featuring a 'Print Room' stamp and a handwritten reference number and date.12th Aug 1926Box 43 \ 3  Scan064
Graph comparing the inlet valve lift diagrams for the Falcon X and Curtiss D12 engines.12th Aug 1926Box 43 \ 3  Scan065
Blank logbook page with a small sketch, handwritten reference, and stamped date.12th Aug 1926Box 43 \ 3  Scan066
Diagram comparing the exhaust valve lift of the Falcon X and Curtiss D12 engines.25th Aug 1926Box 43 \ 3  Scan067
Instruction to change the material of camshaft bearings from Phosphor Bronze to Aluminium.25th Aug 1926Box 43 \ 3  Scan068
Modifications to the rocker mechanism to accommodate triple valve springs.28th Aug 1926Box 43 \ 3  Scan069
Strengthening the F.10 inlet rocker and proposing a comparative test against the old design.16th Sep 1926Box 43 \ 3  Scan070
The preparation of a 3-F-X engine with low compression for camshaft and valve comparison tests.1st Oct 1926Box 43 \ 3  Scan071
The preparation of a 3-F-X low compression engine for camshaft and valve comparison tests.4th Oct 1926Box 43 \ 3  Scan072
Preliminary runs for camshaft and valve comparisons on a Falcon X low compression engine, noting issues with high oil consumption and bearing leaks.5th Oct 1926Box 43 \ 3  Scan073
The despatch of a camshaft drive off an F.X. for examination.12th Oct 1926Box 43 \ 3  Scan074
Camshaft drive failure and proposed modifications for the Falcon 10 and Condor engines.14th Oct 1926Box 43 \ 3  Scan075
Sketch showing the fracture of a Falcon X lower camshaft drive housing.17th Nov 1926Box 43 \ 3  Scan076
Report of a strengthened inlet rocker failure, possibly caused by a broken inner valve spring.26th Nov 1926Box 43 \ 3  Scan077
The despatch of a broken inlet rocker to Mr. Royce for inspection.26th Nov 1926Box 43 \ 3  Scan078
Leakage and design issues with the camshaft drive and hand turning gear.27th Nov 1926Box 43 \ 3  Scan079
Endurance tests conducted on a wet liner engine.27th Nov 1926Box 43 \ 3  Scan080
With a diagram proposing a design for a revolution indicator drive on a camshaft.29th Nov 1926Box 43 \ 3  Scan081
Letter discussing alterations to the F.X. Camshaft Drive and Hand Turning Gear.30th Nov 1926Box 43 \ 3  Scan082
10-hour non-stop hangar test of an F.10 engine which resulted in a camshaft failure.1st Dec 1926Box 43 \ 3  Scan083
Page 2 of an engine test report detailing performance data and adjustments made to magneto gap and tappet clearances.1st Dec 1926Box 43 \ 3  Scan084
The dispatch of a broken rocker shaft to Mr. Royce for inspection.1st Dec 1926Box 43 \ 3  Scan085
Notice of material modification and heat treatment for R.R.F.X. Rocker Shafts.14th Dec 1926Box 43 \ 3  Scan086
Rocker shaft failure after 25 hours, proposing a change in material to a higher carbon, heat-treated steel tube.2nd Dec 1926Box 43 \ 3  Scan087
Design of a spring-mounted tachometer drive on a camshaft, referencing drawing LeC.2331.12th Mar 1926Box 43 \ 3  Scan088
Two mandatory modifications for R.R.F.X. engines.3rd Dec 1925Box 43 \ 3  Scan089
Analysis and proposed improvements for a broken RR.F.10 rocker arm.4th Dec 1926Box 43 \ 3  Scan090
Drawing for a breather on the crankcase and a forthcoming timing disc.8th Dec 1926Box 43 \ 3  Scan091
Drawings for gungar, stronger inlet rockers, and tachometer drive for the R.R. F.10.9th Dec 1926Box 43 \ 3  Scan092
Revised drawing for a camshaft drive and a request for prints.14th Dec 1926Box 43 \ 3  Scan093
Attaching a preliminary drawing of valve rockers without rollers.16th Dec 1926Box 43 \ 3  Scan094
Test report on the ability of scavenger pumps to handle additional oil in the crankcase.18th Dec 1926Box 43 \ 3  Scan095
Modifications to cam design to prevent valve float and spring breakage at high speeds.20th Dec 1926Box 43 \ 3  Scan096
Engine valve spring pressure and rating in relation to air flow.21th Dec 1926Box 43 \ 3  Scan097
Design of valve rockers and cams for a new 750 HP engine, with an accompanying sketch.21th Dec 1926Box 43 \ 3  Scan098
Causes of valve bounce, particularly the effect of air pressure versus elasticity and friction.22th Dec 1926Box 43 \ 3  Scan099
Drawings for valve rockers without rollers.23th Dec 1926Box 43 \ 3  Scan100
Design of cams, springs, and valves for an engine.29th Dec 1926Box 43 \ 3  Scan101
Design of non-roller type valve rockers and cams.30th Dec 1926Box 43 \ 3  Scan102
Expressing dissatisfaction with rollerless valve rockers and awaiting new designs.31th Dec 1926Box 43 \ 3  Scan103
Design and arrangement of exhaust rockers for a new engine.1st Jan 1927Box 43 \ 3  Scan104
Contributing factors to valve bounce in F.10 engines.1st Jan 1927Box 43 \ 3  Scan105
Valve friction, bounce, and a new apparatus for recording valve motion.4th Jan 1927Box 43 \ 3  Scan106
Graph showing the load-lift curves for F.X. inlet valves with lubricated triple springs.4th Jan 1927Box 43 \ 3  Scan107
Blueprint detailing an apparatus for recording engine valve bounce.4th Jan 1927Box 43 \ 3  Scan108
Typed document with handwritten reference numbers and a date stamp, where the main text is illegible.4th Jan 1927Box 43 \ 3  Scan109
Design improvements and testing for engine components including springs, rockers, and cylinder block studs.10th Jan 1927Box 43 \ 3  Scan110
Advantages and implementation of rollerless divided valve rockers.1st Jan 1927Box 43 \ 3  Scan111
Valve bounce and advocating for further investigation into valve spring failures.13th Jan 1927Box 43 \ 3  Scan112
Investigations into valve bounce and spring breakage on the Falcon engine, comparing double and triple spring types.13th Jan 1927Box 43 \ 3  Scan113
Report page analyzing valve bounce and spring oscillation at high camshaft speeds.13th Jan 1927Box 43 \ 3  Scan114
Tests comparing the spring motion of dual and triple springs, noting coil surging and bunching.13th Jan 1927Box 43 \ 3  Scan115
Conclusion on valve bounce and spring oscillation, proposing modifications for further testing.1st Jan 1929Box 43 \ 3  Scan116
Particulars of valve springs and a loading chart for Falcon X valve bounce tests.1st Jan 1929Box 43 \ 3  Scan117
Cover page with a handwritten reference number and a print room stamp.13th Jan 1927Box 43 \ 3  Scan118
Diagram illustrating the action of Falcon X triple valve springs just below bouncing speed.12th Jan 1927Box 43 \ 3  Scan119
Falcon X engine valve bounce tests comparing double and triple spring setups.12th Jan 1927Box 43 \ 3  Scan120
Faded and largely illegible typed document with a handwritten reference and a date stamp.13th Jan 1927Box 43 \ 3  Scan121
Design propositions for valve rockers and rocker bar centres.15th Jan 1927Box 43 \ 3  Scan122
Design alterations and progress on engine components, including cams, rockers, valve springs, and camshaft brackets.9th Jan 1927Box 43 \ 3  Scan123
Selection of new valve springs, weighing the benefits of different specifications against potential engine modifications.1st Jan 1927Box 43 \ 3  Scan124


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