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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Investigation of independent front wheel suspension, particularly in America, and the patent position of the Mercedes Benz design.19th Jan 1934Box 173 \ 2  img007
Research of independent front wheel springing, referencing developments in the USA.23th Jan 1934Box 173 \ 2  img008
Letter from Pratt & Whitney Aircraft Co. to Mr. Robotham enclosing two blueprints for a test house unit.24th Jan 1934Box 173 \ 2  img009
Heavily obscured document page with text visible only in the top-right corner.16th May 1934Box 173 \ 2  img010
Suggestions for independent wheel springing and customer feedback on the brakes of the first 3 1/4 litre Bentley.30th Jan 1934Box 173 \ 2  img012
Independent springing systems, comparing existing designs and proposing a new, improved scheme.29th Jan 1934Box 173 \ 2  img013
Schematic drawing of a mechanical linkage assembly in multiple views.31th Jan 1934Box 173 \ 2  img014
Blueprint of an improved form of wheel control with independent springing.27th Jan 1934Box 173 \ 2  img015
Feedback letter concerning the performance of a 3 1/2 Litre Bentley.29th Jan 1934Box 173 \ 2  img016
Letter detailing initial user feedback and complaints about a new car, including a postscript from an insurance broker.29th Jan 1934Box 173 \ 2  img017
Formulas and variable definitions for centrifugal blowers.22th Mar 1933Box 173 \ 2  img018
Performance graph for a Goshawk Blower 144X, plotting coefficients K and η against V/L for various rotor speeds.22th Mar 1933Box 173 \ 2  img019
Performance graph showing delivery pressure, efficiency, and horse power against air flow for a gearbox and blower.25th Jan 1933Box 173 \ 2  img020
Hand-drawn sketch of a manifold or pipe assembly with handwritten notes.15th Dec 1933Box 173 \ 2  img021
Hs. to Em. forwarding a note from Da.1st Feb 1934Box 173 \ 2  img022
Pros and cons of different independent wheel springing designs, focusing on tyre scrubbing and steering geometry.31th Jan 1934Box 173 \ 2  img023
Note regarding asymmetrical triangles in plan view to avoid interference with a radiator.31th Jan 1934Box 173 \ 2  img024
Correspondence from Wilcox-Rich Corporation regarding a hydraulic tappet blueprint, a potential defect, and design improvements.27th Jan 1934Box 173 \ 2  img025
Blueprint for a Hydraulic Lifter for a Dodge Truck.9th Jan 1934Box 173 \ 2  img026
Hand-drawn sketch of various items hanging from a line.21th Jan 1924Box 173 \ 2  img027
Quote from Harrison Division of General Motors for equipment to manufacture core stock.7th Feb 1934Box 173 \ 2  img028
Letter from General Motors Corporation regarding unsettled questions of manufacturing rights and licenses.7th Feb 1934Box 173 \ 2  img029
Rear spring friction, with comparisons to Cadillac vehicles and a table of theoretical formulae.9th Feb 1934Box 173 \ 2  img030
Continued analysis of spring friction, including formulas and comparisons of different spring types and their performance.9th Feb 1934Box 173 \ 2  img031
Technical memorandum page discussing spring friction, comparing cantilever and flat spring designs and performance.14th Feb 1934Box 173 \ 2  img032
'Spectre' model, engine development, and ongoing issues with braking systems.14th Feb 1934Box 173 \ 2  img033
Conclusion on the ineffectiveness of evaporative cooling and the start of testing Ethylene Glycol on the 600 HP Kestrel engine.14th Feb 1934Box 173 \ 2  img034
Proposed rig tests for a modified lubrication system on Kestrel main bearings following recommendations from Allison.6th Feb 1934Box 173 \ 2  img035
Improving main engine bearings, discussing lubrication, clearances, and new metal alloys.6th Jul 1931Box 173 \ 2  img036
Hand-drawn comparison of crankshaft oil system drilling methods for Allison and Kestrel engines.6th Jul 1931Box 173 \ 2  img037
Proposed rig tests for a modified lubrication system on Kestrel main bearings, following recommendations from Allison.20th Feb 1934Box 173 \ 2  img038
Bearing clearances, crankshaft drilling, and bearing metal alloy tests.1st Feb 1934Box 173 \ 2  img039
Blueprint comparing designs for a continuous oil system in Allison and Kestrel crankshafts.6th Feb 1934Box 173 \ 2  img040
Letter from Harrison Radiator Corporation regarding the composition and application of solder for Prestone radiators.16th Feb 1934Box 173 \ 2  img041
Unreadable document that appears to be a heavily degraded or overexposed photocopy.22th Aug 1934Box 173 \ 2  img042
Telegram received by telephone from Indianapolis regarding flywheel ratio and dynamo performance.22th Aug 1934Box 173 \ 2  img043
Telegram received by telephone from Indianapolis regarding clutch, flywheel, and dynamo performance.22th May 1934Box 173 \ 2  img044
Cablegram concerning the procurement of electrical furnace equipment for bearing production.21th May 1932Box 173 \ 2  img045
Letter from Wright Aeronautical to W. A. Robotham regarding a report on exhaust valves and the Conqueror engine.13th Mar 1934Box 173 \ 2  img046
Outstanding purchases made in the U.S.A., including a Cadillac car, pistons, oil coolers, and a clutch.20th Mar 1934Box 173 \ 2  img047
The shipping arrangements for a Graham Paige 8-cylinder Supercharged car.13th Mar 1934Box 173 \ 2  img048
Special body order form for a Style 6275 Fleetwood Limousine.13th Mar 1934Box 173 \ 2  img049
Vehicle specification sheet detailing appointments, chassis, and extra equipment.12th Mar 1934Box 173 \ 2  img050
Order form for a V-16 Cadillac Seven Passenger Limousine.12th Mar 1934Box 173 \ 2  img051
Letter to Graham Paige Motor Car Co. confirming the order of a supercharged sedan for evaluation.20th Mar 1934Box 173 \ 2  img052
Letter to the Chief Engineer of Graham Paige Motor Car Co. proposing the purchase of an eight-cylinder supercharged car.20th Mar 1934Box 173 \ 2  img053
Bill of sale for a Cadillac V-16 seven-passenger limousine to J.S. Inskip.21th Mar 1934Box 173 \ 2  img054
Notarized Bill of Sale for a vehicle, executed in New York.21th Mar 1934Box 173 \ 2  img055
Telegram about sourcing electrical equipment for bearing production from Dayton, Ohio.21th Feb 1934Box 173 \ 2  img056
Telegram received by telephone regarding a furnace order.22th Feb 1934Box 173 \ 2  img057
Two cable messages received from the USA regarding equipment and engine components.22th Feb 1934Box 173 \ 2  img058
Letter containing crankshaft inertia and critical frequency calculations.20th Feb 1934Box 173 \ 2  img059
Bentley engine performance notes on crank inertia, piston efficiency, and bearing tests.20th Feb 1934Box 173 \ 2  img060
Purchase of a 16-cylinder Cadillac and a Terraplane for technical assessment.19th Feb 1934Box 173 \ 2  img061
The specifications of a single plate long clutch, with comparisons to those used in Lincoln & Packard vehicles.13th Feb 1934Box 173 \ 2  img062
Camshafts, supercharging, and gearboxes, with observations on competitor designs.13th Feb 1934Box 173 \ 2  img063
Memo discussing and comparing various automotive systems including brakes, shock dampers, and lubrication.13th Feb 1934Box 173 \ 2  img064
Automatic induction scheme, brake gear banjos, and front-end drive systems.13th Feb 1934Box 173 \ 2  img065
Timing gear design and coachwork rattles, suggesting comparative testing against American methods.13th Feb 1934Box 173 \ 2  img066
Instructing to gather more first-hand information.23th Feb 1934Box 173 \ 2  img067
Report from the USA discussing clutch, camshaft, and supercharging technology from various car manufacturers.23th Feb 1934Box 173 \ 2  img068
Gearbox durability, simplified brake systems, shock dampers, and lubrication methods.28th Feb 1934Box 173 \ 2  img069
Front end drive, silent chains, and chassis rattles, comparing with American car manufacturers.23th Feb 1934Box 173 \ 2  img070
Memo comparing the engine smoothness and specifications of a Hudson Terraplane with a Rolls-Royce 20/25.19th Feb 1934Box 173 \ 2  img071
Comparison of engine performance, smoothness, and features against a Terraplane unit.19th Feb 1934Box 173 \ 2  img072
Analysis of a competitor's engine, focusing on crankshaft and connecting rod dimensions.19th Feb 1934Box 173 \ 2  img073
Analysis of an engine's design, components, and performance characteristics.19th Feb 1934Box 173 \ 2  img074
Engine mounting systems and proposals for future engine designs.19th Feb 1934Box 173 \ 2  img075
Comparison of engine technology, smoothness, and power output, referencing a Hudson model against a 1934 25 HP Rolls-Royce.19th Feb 1934Box 173 \ 2  img076
On gearbox improvements, referencing a Terraplane gearbox design and the potential use of a Peregrine gearbox on a Bentley.19th Feb 1934Box 173 \ 2  img077
Technical note on crankshaft dampers and split axle independent suspension.19th Feb 1934Box 173 \ 2  img078
Independent suspension experiments and comparisons with other contemporary cars.19th Feb 1934Box 173 \ 2  img079
Technical note detailing observations on piston design, including Cadillac's experimental findings and issues with T-slot pistons and rings.19th Feb 1934Box 173 \ 2  img080
Observations on piston ring performance, oil consumption, and piston design.25th Jan 1934Box 173 \ 2  img081
Anodised piston surfaces, aluminum connecting rods and aero engine detonation.25th Jan 1934Box 173 \ 2  img082
Engine performance, detailing fuel detonation curves, M.E.P. limits for different cooling systems, and maximum jacket temperatures.25th Jan 1934Box 173 \ 2  img083
Aero engine component performance, particularly regarding oil coolers, freezing prevention, and carburetors.23th Feb 1934Box 173 \ 2  img084
Visit to the Hudson Essex Plant, comparing a Terraplane 6-cylinder engine with the R.R. 20/25 unit.23th Feb 1934Box 173 \ 2  img085
Analysis of an engine's smoothness, crankshaft, and connecting rod dimensions compared to competitors.23th Feb 1934Box 173 \ 2  img086
Analysis of American engine designs, focusing on mountings, combustion chambers, and a specific six-cylinder engine.23th Feb 1934Box 173 \ 2  img087
Engine comparisons, gearbox development, and crankshaft damper design, referencing American car technology.23th Feb 1934Box 173 \ 2  img088
Different types of suspension, frames and pistons from competing car manufacturers.23th Feb 1934Box 173 \ 2  img089
Technical report discussing findings on piston rings, oil consumption, and connecting rods.23th Feb 1934Box 173 \ 2  img090
Engine detonation, including a performance graph and a comparison of M.E.P. between water-cooled and air-cooled engines.23th Feb 1934Box 173 \ 2  img091
Engine operating temperatures, cooling systems, and anti-icing measures.23th Feb 1934Box 173 \ 2  img092
Visit to a strip bearing factory, Ford bearings, connecting rod to crank ratios, and engine hot spots.15th Feb 1934Box 173 \ 2  img093
From road tests comparing a Bentley against Cadillac, and Packard vehicles.15th Feb 1934Box 173 \ 2  img094
Engine design, including silent tappets and valve configurations, with comparisons to Cadillac.15th Feb 1934Box 173 \ 2  img095
Engine design choices and the emerging superiority of steel bodies over coachbuilt ones.15th Feb 1934Box 173 \ 2  img096
Combining chassis and coachwork, and a drawing sent to Cadillac.14th Feb 1934Box 173 \ 2  img097
Report from the U.S. covering a bearing factory visit, crank ratios, thermostats, and road tests.14th Feb 1934Box 173 \ 2  img098
Report comparing Cadillac engines, discussing engine design choices, and the challenges posed by steel bodies to traditional coachwork.24th Feb 1934Box 173 \ 2  img099
The licensing and production process of Lead Bronze Bearings with the Allison Engineering Company.9th Feb 1934Box 173 \ 2  img100
Allison's bearing production process and a visit to Gleason's concerning rear axle bevels.9th Feb 1934Box 173 \ 2  img101
Gear lapping, checking, and cutting operations, proposing modifications to improve bedding.9th Feb 1934Box 173 \ 2  img102
Hand-drawn diagram illustrating the process for normal casting of lead bronze bearings.20th Feb 1934Box 173 \ 2  img103
Letter from Long Manufacturing Company regarding clutch specifications for Packard and Lincoln.20th Feb 1934Box 173 \ 2  img104
Specification sheet for a Single Plate 12-CB Clutch as supplied to Lincoln.14th Feb 1934Box 173 \ 2  img105
Telegram from Indianapolis reporting the successful completion of tests on grooved bearings.24th Feb 1934Box 173 \ 2  img106
Telegram message received by telephone regarding grooved bearings and engine revolutions.24th Feb 1934Box 173 \ 2  img107


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