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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Table of results from performance tests conducted on various magnetos.2nd Sep 1924Box 4 \ 5  05-page348
Test data table comparing magneto performance at various speeds, including voltage output and noise levels.25th Aug 1925Box 4 \ 5  05-page349
Modifications to the New Phantom magneto and a related ignition fault.25th Aug 1925Box 4 \ 5  05-page350
Negotiations for magnetos for EAC chassis and clarifying the required specifications.26th Aug 1925Box 4 \ 5  05-page351
Copy of a letter from The M.L. Magneto Synd. Ltd. regarding modifications to a six-cylinder magneto.29th Oct 1924Box 4 \ 5  05-page352
Graph of open circuit volt-speed and short circuit ampere-speed curves for B.T.H. and Watford magnetos.1st Dec 1925Box 4 \ 5  05-page353
Magnetos without automatic advance for the New Phantom chassis.1st Dec 1925Box 4 \ 5  05-page354
Comparing the bench test results, design, weight, and price of B.T.H. magnetos against a standard Watford machine.1st Dec 1925Box 4 \ 5  05-page355
Comparing the specifications and performance of Watford and B.T.H. magnetos.12th Dec 1925Box 4 \ 5  05-page356
Page detailing endurance, circuit, and utility tests on two magnetos.12th Dec 1925Box 4 \ 5  05-page357
Continuation detailing magneto spark gap and utility tests.1st Dec 1925Box 4 \ 5  05-page358
Comparing the high and low-speed sparking characteristics of different magnetos.8th Dec 1925Box 4 \ 5  05-page359
Continued experimental report on steering column backlash, with a later note on magneto noise comparison.10th Dec 1925Box 4 \ 5  05-page360
Curve showing the variation of DC volts with the position of a hand lever on a cam for a B.T.H. Magneto Type FM6.6th Feb 1923Box 4 \ 5  05-page361
Curve showing the variation of D.C. volts with cam lever position for a Watford Edge Magneto No. 7947C.1st Jan 1928Box 4 \ 5  05-page362
Cross-reference note for information on chassis magnetos.31th Dec 1930Box 4 \ 5  05-page363
Complaints of noise and excessive end-play in front spring shackles on high-speed cars.15th Apr 1921Box 4 \ 6  06-page01
Persistent issues with rear spring shackle lubrication and proposing the development of an improved system.10th May 1921Box 4 \ 6  06-page02
The difficulties of forcing grease through shackles and a recommendation for using a strong grease gun.10th May 1921Box 4 \ 6  06-page03
Agreeing with a suggestion to install hardened washers on front springs to reduce wear.10th May 1921Box 4 \ 6  06-page04
Extract discussing end play limits and testing for spring shackles.3rd Aug 1921Box 4 \ 6  06-page05
Inter-office correspondence concerning spring shackle rattles and an investigation into Belflex non-metallic shackles.9th Jun 1922Box 4 \ 6  06-page06
Alternative spring suspension and shackle designs to address lubrication and rattling issues.9th Jun 1922Box 4 \ 6  06-page07
Shackle lubrication methods, comparing different lubricators and proposing alternative schemes.9th Jun 1922Box 4 \ 6  06-page08
Lubrication scheme for various car parts using selector rods as pumps, and referencing a pending U.S. patent.9th Jun 1922Box 4 \ 6  06-page09
Sketch of a typical American adjustable spring shackle.9th Jun 1922Box 4 \ 6  06-page10
Rough sketch comparing a Sheldon spring without shackles to Mack bus shackles.9th Jun 1922Box 4 \ 6  06-page11
Sketch of a Belflex shackle for the front and rear springs of a Willys-Knight experimental car.28th Dec 1922Box 4 \ 6  06-page12
Concerns over shackle and footbrake squeaks on 20 HP demonstration cars.28th Dec 1922Box 4 \ 6  06-page13
Letter from The Rubber Shock Insulator Company regarding their rubber shackle bolts and enclosing a blueprint.2nd Jan 1923Box 4 \ 6  06-page14
The distribution of a document and photographs concerning rubber shackles.12th Jun 1923Box 4 \ 6  06-page15
Letter detailing the performance of rubber shackles fitted to a Hupmobile car.1st Jun 1925Box 4 \ 6  06-page16
The design and performance of rubber shackles for vehicle suspension systems.1st Jun 1925Box 4 \ 6  06-page17
Spring experiments on 20 HP and 40/50 models and requesting permission to submit prints to makers.1st Jun 1925Box 4 \ 6  06-page18
Photograph showing the rear three-quarter view of a vintage saloon car on a ramp.10th Aug 1923Box 4 \ 6  06-page20
Rubber shackles, forwarding a copy of a document received from Springfield.10th Aug 1923Box 4 \ 6  06-page21
Letter detailing the contents of two parcels containing blueprints and photographs regarding rubber shackles.21th Jul 1925Box 4 \ 6  06-page22
The function of rubber blocks in a suspension system and the potential cost of an experiment.20th Aug 1923Box 4 \ 6  06-page23
From B.J. to H. attaching a letter received from Springfield regarding shackles.20th Aug 1923Box 4 \ 6  06-page24
Letter from F.W. Taylor requesting an interview with Mr. Royce and enclosing a letter of introduction from the International Motor Company.26th Sep 1920Box 4 \ 6  06-page25
Letter of introduction for a young engineering student returning to England with samples of rubber shackles.27th Aug 1923Box 4 \ 6  06-page26
Letter regarding the receipt of rubber shackle samples and information from R-R (America) Inc.1st Oct 1923Box 4 \ 6  06-page27
Standardisation of a rear spring shackle to provide more wearing surface.26th Sep 1923Box 4 \ 6  06-page28
Communication regarding a lost Mackenzie's change speed fan drive and the status of spring shackles.1st Feb 1924Box 4 \ 6  06-page29
Fan drive experiment proposal and the decision against testing spring shackles.14th Feb 1924Box 4 \ 6  06-page30
Acquiring and testing American-designed rubber shackles for the 40/50 car.1st Jan 1924Box 4 \ 6  06-page31
Chasing a promised set of Rubber Shackle parts for the 40/50 HP model.12th Jun 1924Box 4 \ 6  06-page32
Calculations for front spring stiffness, considering factors like encastrement and shackle inclination.9th Jun 1926Box 4 \ 6  06-page33
Letter from the American branch to the UK discussing Belflex shackles and their potential to eliminate front-end shimmy.28th Apr 1928Box 4 \ 6  06-page34
Letter from Maurice Olley to E. W. Hives regarding rubber mountings in American automotive practice.14th Jul 1926Box 4 \ 6  06-page35
Article from 'Automotive Industries' detailing the design and features of a new Mack gas-electric bus.22th Apr 1926Box 4 \ 6  06-page36
Patent for improvements in motor vehicle road spring attachments.10th Jun 1927Box 4 \ 6  06-page37
Patented arrangement by Springfield, its similarity to an Australian suggestion, and plans to test shackles on experimental cars.18th Jun 1927Box 4 \ 6  06-page38
Letter to Mr. Douglas Robertson in Australia declining his submitted design for a spring shackle due to a pre-existing patent and similar internal development.13th Apr 1927Box 4 \ 6  06-page39
Drawing of a front spring shackle assembly, including the front horn and shackle components.14th Sep 1925Box 4 \ 6  06-page40
Querying a potential clerical error regarding a date, with a handwritten annotation confirming the correct year.14th Jun 1927Box 4 \ 6  06-page41
Letter from B. Johnson to Mr. Claremont enclosing a copy of a letter and a memorandum from other parties.14th Jun 1927Box 4 \ 6  06-page42
Requesting a correction of a date from 1927 to 1917 in a letter to Mr. Douglas Robertson.15th Jun 1927Box 4 \ 6  06-page43
Inquiry to Delaunay-Belleville Motors regarding their spring-loaded shackle to cure steering road shocks.8th May 1931Box 4 \ 6  06-page44
Letter to Delaunay-Bellville Motors Ltd. regarding a spring loaded shackle to cure steering road shocks.9th May 1931Box 4 \ 6  06-page45
Letter from Delaunay Belleville Motors Ltd. regarding a patented spring-loaded shackle to prevent 'shimmy'.11th May 1931Box 4 \ 6  06-page46
Follow-up letter to Delaunay Belleville Motors chasing for information from their French counterpart.21th May 1931Box 4 \ 6  06-page47
Letter regarding Delco Shock Absorbers, shimmy shackles, and synchro-mesh gearboxes.21th May 1931Box 4 \ 6  06-page48
Letter from Cadillac Motor Car Company regarding testing and development of shock absorbers.12th May 1931Box 4 \ 6  06-page49
Technical comparison of synchro mesh gearboxes and steering systems from Buick and other American manufacturers.12th May 1931Box 4 \ 6  06-page50
Vehicle dynamics, including shimmy, frame stiffness, and vibration frequencies.12th May 1931Box 4 \ 6  06-page51
Analysis of vehicle chassis dynamics, frame stiffness, and the effects of damping.15th Jun 1931Box 4 \ 6  06-page52
Request to produce a modified flexible spring shackle for comparative testing on a 25-EX vehicle.15th Jun 1931Box 4 \ 6  06-page53
Request for a catalogue and sample of oil-less bushes for the Peregrine project, specifying the 'silent bloc' type.16th Dec 1931Box 4 \ 6  06-page54
Outlining two schemes for oil-less bushes, one using bronze with graphite and the other using solid rubber shackles.14th Dec 1931Box 4 \ 6  06-page55
The suitability of oil-less bushes for heavy loads, with reference to the 'Silent bloc' scheme used by Delage.23th Dec 1931Box 4 \ 6  06-page56
Decision to permanently fit flexible spring shackles based on trials and a request to prepare three more sets.4th Mar 1932Box 4 \ 6  06-page57
Fitting of a spring shackle for steering joggles on models P.2, J.3, & J.1.7th Mar 1932Box 4 \ 6  06-page58
Experiments on exhaust silencers, steering modifications, and flexible shackle suspension.14th Apr 1932Box 4 \ 6  06-page59
Proposal and discussion regarding a spring-controlled rear shackle for front springs on the P.2 model.15th Apr 1932Box 4 \ 6  06-page60
Alternative design suggestions for a spring-controlled rear shackle for front springs.15th Apr 1932Box 4 \ 6  06-page61
Drawbacks in the design of a spring cantilever rear shackle for the 10 HP Royce car.22th Apr 1932Box 4 \ 6  06-page62
Fitting of a flexible shackle to car 24-EX.28th Apr 1932Box 4 \ 6  06-page63
Fitting of a flexible spring shackle to car 24-EX.28th Apr 1932Box 4 \ 6  06-page64
Standardisation report for a 40/50 HP Shimmy Shackle designed to reduce road shocks.27th Jun 1932Box 4 \ 6  06-page65
Introduction of a new part to a chassis for testing, including costs and dates.3rd Sep 1932Box 4 \ 6  06-page66
Instruction to replace the No.2 bijur with a No.3 to fix failing lubrication on rear road springs.10th Jan 1933Box 4 \ 6  06-page67
Page with the handwritten number 441 at the top.17th Aug 1910Box 4 \ 7  07-page01
Inquiry regarding royalty payments made by the New Engine Company to Lanchester for car springs.17th Aug 1910Box 4 \ 7  07-page02
Letter from 'The Auto' magazine discussing royalty payments and the differences between N.F.C. and Lanchester suspension systems.29th Sep 1910Box 4 \ 7  07-page03
Dynamometer test report for a 6-cylinder Silver Ghost chassis.5th Feb 1912Box 4 \ 7  07-page04
Note concerning the Lanchester plate clutch, initiated by a question from Mr. Royce.5th Feb 1912Box 4 \ 7  07-page05
Request to obtain specific lubricating oil for a Lanchester chassis and Daimler.8th Feb 1912Box 4 \ 7  07-page06
Report by Mr Royce and Mr Platford on a 38 HP 6-Cylinder Lanchester Car.8th Mar 1912Box 4 \ 7  07-page07
Continuation of a report detailing issues and opinions on the 38 HP 6-cylinder Lanchester Car.1st Apr 1912Box 4 \ 7  07-page08
Further report on the Lanchester Car, detailing its epicyclic gear and engine characteristics.8th Mar 1912Box 4 \ 7  07-page09
Engineering report detailing issues with crankshaft dampers, worm gears, brakes, axles, and steering components.14th Feb 1927Box 4 \ 7  07-page10
Use of flat races versus hollow recessed races in thrust ball bearings.8th Mar 1912Box 4 \ 7  07-page11
Lanchester back axle oil and a request for a Ford instruction book.8th Mar 1912Box 4 \ 7  07-page12
Request to analyze a sample of oil used in a Lanchester back axle to determine its composition.13th Mar 1912Box 4 \ 7  07-page13
Letter from the Midland Counties Motor Garage Company regarding an enquiry for Lanchester oil and a Ford instruction book.11th Mar 1912Box 4 \ 7  07-page14
Dynamometer test report for a chassis, detailing engine horsepower at various RPMs and other performance metrics.9th Mar 1912Box 4 \ 7  07-page15
Driving a Lanchester chassis, focusing on the worm axle and epicyclic charge speed gear.19th Mar 1912Box 4 \ 7  07-page16
Brief typed memo concluding a discussion on horsepower standards.21th Jan 1920Box 4 \ 7  07-page17
Inspection report on the condition and weight of engine and transmission components, and the general state of a vehicle upon arrival.21th Jan 1920Box 4 \ 7  07-page18


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