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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Specifications for a large bore engine unit (No. U75), detailing the cylinder head, Stromberg carburettor, and jet settings.12th Feb 1936Box 20 \ 9  Scan118
Modifications and carburettor specifications for Unit E.S.M. (large bore).12th Feb 1936Box 20 \ 9  Scan119
Preliminary test results and identified faults for a Phantom III Stromberg Carburetter.24th Feb 1936Box 20 \ 9  Scan120
Adjustments to the throttle return spring and the torsional return spring on the choke.24th Feb 1936Box 20 \ 9  Scan121
Official order for received Tecalemit filters and Stromberg carburettors.24th Feb 1936Box 20 \ 9  Scan122
Letter to Zenith Carburetter Co. Ltd. about sticking accelerator pumps caused by misalignment.25th Feb 1936Box 20 \ 9  Scan123
Invoice from Zenith Carburetter Co. Ltd for By Pass Jets.26th Feb 1936Box 20 \ 9  Scan124
Invoice from Zenith Carburetter Co. for replacement Bypass Jets.29th Feb 1936Box 20 \ 9  Scan125
Request to place an official order for duplex carburetter parts for a Phantom III, received from the Zenith Carb. Co.2nd Mar 1936Box 20 \ 9  Scan126
Invoice for a Zenith carburetter and instructing the stores department to book it in.4th Mar 1936Box 20 \ 9  Scan127
The receipt of an E.E.3 carburettor from Zenith Carburetter Co. and the need to raise an official order.6th Mar 1936Box 20 \ 9  Scan128
Specification for the Stromberg Carburetter for the 20/25 model, detailing part dimensions and an initial manufacturing agreement.27th Mar 1936Box 20 \ 9  Scan129
Official order for carburettor parts received from the Zenith Carburetter Co.28th Mar 1936Box 20 \ 9  Scan130
Request to check attached drawings against parts proposed for standardization, with reference to an attached letter from Zenith Carb. Co.31th Mar 1936Box 20 \ 9  Scan131
Instruction to modify the petrol feed for the Stromberg duplex carburetters on a Phantom III.7th Apr 1936Box 20 \ 9  Scan132
Modifications to the Phantom III Stromberg carburettor and S.U. petrol pumps to resolve fuel starvation issues at high speeds.8th Apr 1936Box 20 \ 9  Scan133
Performance and pressure characteristics of petrol pumps, including free flow, back pressure, and spring ratings.8th Apr 1936Box 20 \ 9  Scan134
Graph comparing the delivery flow of a standard petrol pump against one with stronger springs under varying back pressure.1st Apr 1936Box 20 \ 9  Scan135
Stamped document from the print room.8th Apr 1936Box 20 \ 9  Scan136
Tests for fire risk and misfiring on a Stromberg carburettor for the Big Bore 20/25 HP model.8th Apr 1936Box 20 \ 9  Scan137
Flooding tests on a 25/30 HP model to provide an effective overflow drain for a Stromberg carburettor float chamber.8th Apr 1936Box 20 \ 9  Scan138
Extract from a letter by G. Summers suggesting improvements to the ignition system for wet weather performance.3rd Apr 1936Box 20 \ 9  Scan139
Schematic diagram of a float chamber vent and drainage system for a Stromberg carburetter.8th Apr 1936Box 20 \ 9  Scan140
Largely blank page with a purple 'Print Room' stamp in the bottom right corner.8th Apr 1936Box 20 \ 9  Scan141
Visit from Col. Hutchinson and a tyre offer from the Michelin Tyre Co. for armoured cars.22th Sep 1920Box 20 \ 10  Scan001
Accompanying two blueprints for 'F' Scheme 573, showing the modified position of an extra oil and petrol tank on the production chassis.23th Sep 1920Box 20 \ 10  Scan002
Confirmation of a telegram telephoned to Chichester regarding a government order and the ability to deliver parts.12th Oct 1920Box 20 \ 10  Scan003
Short note from Royce requesting models of purchasable items to be brought to the Russell Hotel.11th Aug 1920Box 20 \ 10  Scan004
Dispatch of blueprints for an armoured car's barring gear, specifically the ratchet and retaining rings.19th Oct 1928Box 20 \ 10  Scan005
Blueprints for a battery in frame for Armoured Cars.21th Oct 1920Box 20 \ 10  Scan006
Positioning of headlamps on armoured cars to clear the radiator shutters.22th Oct 1920Box 20 \ 10  Scan007
Blueprints and fitting of a hand barring gear for Armoured Cars.25th Oct 1920Box 20 \ 10  Scan008
Blueprints and the positioning of hand barring gear for armoured cars, seeking approval from the coachbuilder.25th Oct 1920Box 20 \ 10  Scan009
Proposal for a new method of driving a tyre pump on armoured cars using a flexible shaft.11th Oct 1920Box 20 \ 10  Scan010
The fit of castellated gears for the 40/50 gearbox under 'N' Scheme 622.26th Oct 1920Box 20 \ 10  Scan011
Blueprints for the wiring arrangement of a battery in an armoured car frame.26th Oct 1920Box 20 \ 10  Scan012
Proposal for an alternative hand barring gear for armoured cars, using a wire rope to swing the flywheel.30th Oct 1920Box 20 \ 10  Scan013
Modification and strengthening of towing hooks for armoured cars.9th Nov 1920Box 20 \ 10  Scan014
Letter responding to an inquiry about experimenting with corrugated sand drums for armoured cars.12th Nov 1920Box 20 \ 10  Scan015
Proposal for mounting a spare wheel carrier on an armoured car, discussing dimensions and clearances.2nd Dec 1920Box 20 \ 10  Scan016
Practicalities of carrying a spare wheel, focusing on weight distribution and potential issues with deflated tyres.1st Dec 1920Box 20 \ 10  Scan017
The hubs for 19 armoured cars destined for India, referencing 'N' Scheme 784.19th Mar 1921Box 20 \ 10  Scan018
Confirmation of a telegram from Royce to Hives regarding testing an armoured car air pump.4th Oct 1922Box 20 \ 10  Scan019
Telegram about an agreement for tall radiator caps for armoured cars and a request to send a Bijur Bendix model.6th Dec 1921Box 20 \ 10  Scan020
Meeting notes on a proposal to increase the number of experimental cars from three to six for more efficient testing.8th Dec 1911Box 20 \ 11  Scan001
Meeting minutes discussing information on competitor vehicles from Delaunay-Belleville, Napier, and Lanchester.14th Dec 1911Box 20 \ 11  Scan002
Confidential memorandum regarding the purchase and technical examination of competitor vehicles for design improvement.1st Jan 1908Box 20 \ 11  Scan003
Meeting minutes discussing trial reports on competitor vehicles including Siddeley, Sunbeam, and Daimler.4th Jan 1912Box 20 \ 11  Scan004
Confidential memo regarding the purchase of competitor cars for analysis and comparison.13th Dec 1911Box 20 \ 11  Scan005
Proposal to annually purchase and test competitor vehicles to benchmark performance and inform design improvements.21th Dec 1911Box 20 \ 11  Scan006
Extract from a note regarding the procurement of experimental cars to address noisy engine gears.21th Dec 1911Box 20 \ 11  Scan007
Confidential memo regarding the scheduled delivery of competitor chassis and the instruction to remove all identifying numbers.29th Dec 1911Box 20 \ 11  Scan008
Test run of chassis 1926 with body 1731, focusing on deep frame performance and rattles.20th May 1912Box 20 \ 11  Scan009
Chassis performance, noting the absence of 'coronation rattles', the effectiveness of the ventilation scheme, and the audibility of helical gear noise.20th May 1912Box 20 \ 11  Scan010
Technical evaluation report on vehicle components including a cotton belting clutch, deep tooth axle, and springing.20th May 1912Box 20 \ 11  Scan011
Report page detailing observations on vehicle components including suspension, engine lubrication, and wiring.20th May 1912Box 20 \ 11  Scan012
Creaking wheel noise and an overall assessment of a car's comfort.24th Jun 1912Box 20 \ 11  Scan013
Experimental run report on Chassis 1714, evaluating the performance of the axle, gears, clutch, and flywheel.24th Jun 1912Box 20 \ 11  Scan014
Vehicle component performance including vibration, an oil-tank cap, pedal plates, a radiator, and bonnet beading.24th Jun 1912Box 20 \ 11  Scan015
Vehicle component performance including side lamp brackets, a new ventilation scheme, and Mercedes type tappets.24th Jun 1912Box 20 \ 11  Scan016
Issues with new fibre high-tension wires, poor springing, and body rattles on a vehicle.4th Mar 1912Box 20 \ 11  Scan017
Test run of Experimental Chassis 1718, evaluating its underslung springs and Marshall tyre jackets.4th Mar 1912Box 20 \ 11  Scan018
The performance of various vehicle components including wheels, clutch, brake, axle, and gears.4th Mar 1912Box 20 \ 11  Scan019
Test report page detailing observations on various vehicle components.1st Oct 1941Box 20 \ 11  Scan020
New steering wheel and general observations on body noises and rattles.1st Oct 1941Box 20 \ 11  Scan021
Letter from F.H. Royce regarding the educational overhaul of a new chassis by specific personnel.6th Jun 1912Box 20 \ 11  Scan022
The inspection and overhaul of chassis from other car manufacturers for learning purposes.12th Jun 1912Box 20 \ 11  Scan023
To Mr. Royce regarding the transport of a Daimler and a Napier for experimental work.12th Sep 1912Box 20 \ 11  Scan024
Experimental test run of a 25 HP Argyll car regarding engine vibration and performance.9th Oct 1912Box 20 \ 11  Scan025
Report page detailing observations on vehicle vibration, floorboard isolation, proposed engine tests, and brake feel.1st Nov 1912Box 20 \ 11  Scan026
Road test report on a vehicle's braking, body booming at speed, bonnet noise, and suspension.1st Nov 1912Box 20 \ 11  Scan027
The testing of an improved throttle with a spring-seated valve.25th May 1914Box 20 \ 11  Scan028
Instructions regarding modifications to the experimental chassis, specifically the 2200 series.11th Dec 1919Box 20 \ 11  Scan029
Instruction regarding the 3-month lead time for experimental chassis production ahead of the standard model.10th Jun 1912Box 20 \ 11  Scan030
Internal instruction memo regarding the delivery schedule for experimental cars.12th Dec 1912Box 20 \ 11  Scan031
Departmental memo regarding motor car licences, the use of red plates, and the cancellation of registrations.27th Jan 1913Box 20 \ 11  Scan032
The cancellation of motor car licences and the use of a number plate for station work.28th Jan 1913Box 20 \ 11  Scan033
Instruction sheet for the Experimental Department detailing work on four specific vehicles.4th Feb 1913Box 20 \ 11  Scan034
Instructions regarding the status and future use of four specific experimental cars.1st Feb 1913Box 20 \ 11  Scan035
Internal instructions regarding the experimental value and potential disposal of competitor cars.11th Nov 1912Box 20 \ 11  Scan036
Mr. Hive's report on standardizing experimental cars for disposal.5th Feb 1913Box 20 \ 11  Scan037
Body specifications for experimental cars 2300 and 2301.19th Feb 1913Box 20 \ 11  Scan038
Instruction to replace cracked front cross members on experimental cars chassis 2100E and 1714.4th Jun 1913Box 20 \ 11  Scan039
Internal memorandum regarding the overhaul and sale of chassis 1718, and a handwritten reply concerning its continued use.16th Jul 1913Box 20 \ 11  Scan040
Instructions for the reassembly of Chassis 1718 with a swivel type front cross member, new springs, and experimental gearbox gears.23th Sep 1913Box 20 \ 11  Scan041
Instructions for repairs and alteration of the steering on chassis no. 1718.23th Jan 1914Box 20 \ 11  Scan042
The specifications and delivery of a car for Mr. Royce.29th Jul 1913Box 20 \ 11  Scan043
Letter confirming arrangements for an experimental car viewing at the Angel Hotel, Peterborough.31th Jul 1913Box 20 \ 11  Scan044
Wire sent about a car being prepared for Mr. Royce.31th Jul 1913Box 20 \ 11  Scan045
Telegram received by telephone from Royce regarding car and travel arrangements.1st Aug 1913Box 20 \ 11  Scan046
Forwarding a query from Mr. Lomas about the status of the Le Canadel Car.1st Aug 1913Box 20 \ 11  Scan047
Options for sourcing a new demonstration class car.22th Aug 1913Box 20 \ 11  Scan048
Suggestion and empowering the recipient to decide on Mr Platford's request.23th Jun 1913Box 20 \ 11  Scan049
The practice for handling old experimental cars, which involved replacing experimental fittings and selling them second-hand.2nd Sep 1913Box 20 \ 11  Scan050
List of parts for a 10,000-mile car test for approval by Mr Royce.11th Oct 1913Box 20 \ 11  Scan051
Whether to send a chassis to Mr. Jellinek of Mercedes and reporting a breakdown of an experimental car due to faulty connecting rods.7th Nov 1913Box 20 \ 11  Scan052
Typed memo regarding the repair of a car, including parts orders and expected timeline.7th Nov 1913Box 20 \ 11  Scan053
Request for a list of all cars in the Experimental Shop, with the handwritten response listing them.26th Jan 1914Box 20 \ 11  Scan054
Instructions regarding required parts for a 1918 chassis.3rd Jan 1914Box 20 \ 11  Scan055
Disagreement over the repair or rebuilding of Chassis 1718.27th Jan 1914Box 20 \ 11  Scan056


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