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 Autovac Manufacturing Co. Ltd. regarding a faulty Autovac apparatus from an experimental car.8th Jan 1932Box 40 \ 4  Scan357
Letter to The Autovac Manufacturing Co. Ltd. regarding a faulty Autovac apparatus sent for investigation.11th Jan 1931Box 40 \ 4  Scan358
Letter from Autovac Manufacturing Co. Ltd explaining the cause of failure of a returned Autovac apparatus due to wear on the suction valve.14th Jan 1932Box 40 \ 4  Scan359
Blueprint diagram of a float chamber assembly with various valves and connections.27th Feb 1933Box 40 \ 4  Scan360
Issues with the Autovac's conical gauze filter causing petrol supply problems and recommending its deletion.27th Feb 1933Box 40 \ 4  Scan361
Letter to The Autovac Manufacturing Co. regarding issues with a small conical gauze filter choking up on the autovac system.28th Feb 1933Box 40 \ 4  Scan362
Choking of the autovac's conical gauze filter and proposed tests and actions.28th Feb 1933Box 40 \ 4  Scan363
Letter from Autovac Manufacturing Co. Ltd. responding to an inquiry about a conical gauze petrol filter.1st Mar 1933Box 40 \ 4  Scan364
Choking of the Autovac petrol supply filter and proposing modifications.20th Mar 1933Box 40 \ 4  Scan365
Improvements and alternatives for the Autovac petrol supply filter.21th Mar 1933Box 40 \ 4  Scan366
The persistent issue of choked Autovac filters on Phantom II and 25-HP chassis.12th May 1933Box 40 \ 4  Scan367
The potential standardisation of deleting the autovac filter on Phantom II & 25 HP chassis.15th May 1933Box 40 \ 4  Scan368
Autovac tests measuring petrol flow for the Phantom II, Standard Continental Phantom, and a new 8 litre engine.18th May 1933Box 40 \ 4  Scan369
Comparison test of engine power output using an Autovac fuel supply versus a test bed supply, noting power loss due to petrol starvation.3rd Jul 1933Box 40 \ 4  Scan370
Query regarding the fitment of a larger autovac filter following the deletion of tank-filters on two models.3rd Jul 1933Box 40 \ 4  Scan371
Proposal to remove the small conical filter in Autovacs on 20/25 HP and Phantom II cars.4th Jul 1933Box 40 \ 4  Scan372
Standardisation of chassis parts concerning the deletion of the filter in the Autovac.5th Jul 1933Box 40 \ 4  Scan373
The standardisation of fitting a filter in the Autovac system.2nd Aug 1933Box 40 \ 4  Scan374
Dynamometer test report on petrol supply from an autovac to an S.U. carburetter.26th Oct 1933Box 40 \ 4  Scan375
Test results showing petrol level loss in an Autovac system at various engine speeds with low fuel.26th Oct 1933Box 40 \ 4  Scan376
General notes for Chassis 1 EX, detailing a modification to the magneto's base plate.21th Aug 1919Box 40 \ 5  Scan001
Ignition system improvements on the 1 EX experimental car, including spring material and magneto accessibility.21th Aug 1919Box 40 \ 5  Scan002
With sketches detailing Mr. Royce's design approval for a 40/50 HP magneto strap.8th Oct 1919Box 40 \ 5  Scan003
Adoption of scheme 155 for the magneto base on the 40/50 HP chassis.3rd Nov 1919Box 40 \ 5  Scan004
Fitting a Watford Magneto on a sloping base for the 40/50 Chassis to improve accessibility.23th Dec 1919Box 40 \ 5  Scan005
Blueprints for parts to fit a Watford Magneto on a 40/50 Chassis.2nd Feb 1920Box 40 \ 5  Scan006
Proposal to test the 4.EX experimental chassis at West Wittering, listing its new features.27th Feb 1920Box 40 \ 5  Scan007
List of experimental parts fitted to chassis 6.EX.22th Jun 1920Box 40 \ 5  Scan008
Extract detailing a list of experimental parts to be fitted to car 6.EX.28th Jun 1920Box 40 \ 5  Scan009
Distributing standardisation sheets for a list of experiments.12th Oct 1920Box 40 \ 5  Scan010
Cover memo for standardisation sheets detailing various part modifications.26th Oct 1920Box 40 \ 5  Scan011
Listing standardisation sheets for several experiments.3rd Nov 1920Box 40 \ 5  Scan012
Standardisation of a sloping base for the magneto and a new clip.3rd Nov 1920Box 40 \ 5  Scan013
Preparation and modification of an experimental car for testing in the U.S.A.4th Nov 1920Box 40 \ 5  Scan014
Design change to the magneto with a sloping base on the 40/50 chassis to simplify production.16th Nov 1920Box 40 \ 5  Scan015
Inclined base for a magneto, enclosing copies of other correspondence.29th Apr 1921Box 40 \ 5  Scan016
Inclined base for a magneto, to be discussed by the Works Committee.30th Apr 1931Box 40 \ 5  Scan017
Letter regarding a design defect on the inclined base for the magneto, suggesting a material change from steel to brass.9th Apr 1921Box 40 \ 5  Scan018
The low sparking speeds of an experimental magneto with a sloping base.8th May 1921Box 40 \ 5  Scan019
Report investigating a magneto with a sloping base, where the securing strap is short-circuiting the magnetic flux.10th May 1921Box 40 \ 5  Scan020
Sample Boyce Moto-Meter received from America for potential testing.5th Sep 1919Box 40 \ 5  Scan021
Instructions and sketch detailing temperature readings for a Boyce Motor Meter.7th Jul 1918Box 40 \ 5  Scan022
Technical memo evaluating the Boyce Moto-Meter, with test results and a diagram.9th Sep 1919Box 40 \ 5  Scan023
Querying the number of Boyce Motor Meter models received from the supplier.25th Sep 1919Box 40 \ 5  Scan024
Sample Boyce Moto-Meters and the attached letter from the manufacturer.15th Oct 1919Box 40 \ 5  Scan025
Sales letter from The Moto Meter Company, Inc. proposing the adoption of the BOYCE MOTO-METER as equipment.26th Oct 1921Box 40 \ 5  Scan026
Quoting a letter from The Benjamin Electric Ltd. regarding their Boyce Moto-Meter temperature gauge.26th Oct 1921Box 40 \ 5  Scan027
Letter to The Moto Meter Company declining the use of their 'Boyce' Moto Meters and confirming their return.3rd Nov 1919Box 40 \ 5  Scan028
Letter from The Moto Meter Company regarding the supply of motor temperature indicators.24th Nov 1919Box 40 \ 5  Scan029
Alteration proposal for the Boyce Motometer from the Springfield factory.28th Aug 1923Box 40 \ 5  Scan030
Proposal to use a Boyce distance-type thermometer in place of a Foxboro instrument to save on delays and expense.15th Aug 1928Box 40 \ 5  Scan031
Design considerations for producing left-hand steering vehicles, particularly for the American market.29th May 1919Box 40 \ 5  Scan032
New chassis for the American factory and the steering position.29th May 1919Box 40 \ 5  Scan033
The required modifications for a left-hand drive American model, including changes to the engine and various components.27th Sep 1919Box 40 \ 5  Scan034
List of modifications for various vehicle components, page 2.27th Sep 1919Box 40 \ 5  Scan035
List of modifications and notes for various vehicle components, including changes for a left/right-hand drive conversion.27th Sep 1919Box 40 \ 5  Scan036
Forwarding a cable from America regarding proposed alterations to a chassis.12th Dec 1919Box 40 \ 5  Scan037
Design specifications for the American chassis, including left-hand steering and frame length.10th Dec 1919Box 40 \ 5  Scan038
Recommendation to switch from right-hand to left-hand steering for cars built in the United States.30th Jul 1920Box 40 \ 5  Scan039
With sketches discussing the design of a petrol tank side filler vent pipe, based on points raised by Mr. Royce.8th Aug 1920Box 40 \ 5  Scan040
Hand-drawn sketch of a float mechanism with some cursive doodles.19th Mar 1920Box 40 \ 5  Scan041
Design specifications for a filler cap handle, strainer, and washer joint, including sketches and comments from Mr. Royce.19th Mar 1920Box 40 \ 5  Scan042
Note clarifying the fuel filler position based on the car's steering configuration.5th Aug 1920Box 40 \ 5  Scan043
Requesting rapid progress on drawings for a left-hand drive 40/50 chassis.3rd Sep 1920Box 40 \ 5  Scan044
Copy of a telegram from Royce with instructions for drawings of a left-hand drive car.3rd Sep 1920Box 40 \ 5  Scan045
Design alterations required for a left-hand steering car.6th Sep 1920Box 40 \ 5  Scan046
Extract detailing future improvements to electrical components, a new three-speed gearbox, and the introduction of left-hand steering.7th Sep 1920Box 40 \ 5  Scan047
Supply of left-hand drive chassis to right-hand drive countries and the potential market reception of central gear levers.30th Dec 1920Box 40 \ 5  Scan048
Extract discussing experiments with a new pump design to resolve issues with lubrication and bearing placement.28th Apr 1917Box 40 \ 5  Scan049
New scheme for the 'Eagle' water pumps to address issues with worn rotor spindles.4th Jun 1919Box 40 \ 5  Scan050
Experimental union connection for the low-pressure oil system and alterations to the carburettor jacket water connection.4th Jun 1919Box 40 \ 5  Scan051
Listing drawings being sent for information regarding an 'Eagle' water pump and 20 HP rear axle components.5th Jun 1919Box 40 \ 5  Scan052
Print for the Eagle Double Gland Water Pump.6th Jun 1919Box 40 \ 5  Scan053
Dispatch of two blueprints for the Eagle Water Pump.11th Nov 1919Box 40 \ 5  Scan054
List of parts for an Eagle Water Pump, accompanying two Blue Prints for one experimental set.11th Nov 1919Box 40 \ 5  Scan055
Listing goods received from various suppliers for specific experiments.3rd Feb 1920Box 40 \ 5  Scan056
Improvements to water pumps for Eagle engines on airships, including a larger pattern and a new lubrication system.24th Jun 1920Box 40 \ 5  Scan057
Letter from Bijur Motor Appliance Company describing the construction of an automatic gear engaging device.16th Dec 1921Box 40 \ 5  Scan058
Description of the operation of a starter motor's friction clutch and pinion engagement mechanism.16th Dec 1921Box 40 \ 5  Scan059
Explanation of the operation of an automatic meshing device, including its engagement, disengagement, and behavior under non-ideal conditions.16th Dec 1921Box 40 \ 5  Scan060
Comparing the operation of Bendix and Bijur starter drive mechanisms.16th Dec 1921Box 40 \ 5  Scan061
Technical explanation of the advantages and safety features of the Bijur starter drive system.16th Dec 1921Box 40 \ 5  Scan062
Specifications for the Bijur drive and requesting information for ordering test samples.16th Dec 1921Box 40 \ 5  Scan063
Letter from the European Representative to Henri Lauer regarding a starter motor sample and layout drawing No.E-1236.16th Dec 1921Box 40 \ 5  Scan064
Sketch of an automatic gear shifting device for an electric starter in its disengaged position.16th Dec 1921Box 40 \ 5  Scan065
Cross-section sketch of an automatic gear shifting device for an electric starter in the cranking position.18th Dec 1921Box 40 \ 5  Scan066
Sketch No. 3 of an automatic gear shifting device for an electric starter.16th Dec 1921Box 40 \ 5  Scan067
Letter from Bijur Motor Appliance Company describing an automatic gear engaging device.16th Dec 1921Box 40 \ 5  Scan068
Description of the operation of a starter motor engagement mechanism.16th Dec 1921Box 40 \ 5  Scan069
Explanation of a starter pinion and flywheel engagement mechanism, with a comparison to the Bendix Drive system.16th Dec 1921Box 40 \ 5  Scan070
Technical comparison of a starter drive mechanism with the Bijur drive, focusing on its advantages and safety features.16th Dec 1921Box 40 \ 5  Scan071
Flywheel gear cutting and specifications for ordering Bijur drive test samples.16th Dec 1921Box 40 \ 5  Scan072
Letter from a European Representative awaiting instructions regarding a test sample starter with a Bijur drive.16th Dec 1921Box 40 \ 5  Scan073
Cross-section drawing of an automatic gear shifting device for an electric starter.16th Dec 1921Box 40 \ 5  Scan074
Reverse side of a document page featuring a 'Print Room' ink stamp.26th Dec 1938Box 40 \ 5  Scan075
Cross-section sketch of an automatic gear shifting device for an electric starter in the cranking position.16th Dec 1921Box 40 \ 5  Scan076
Cross-section schematic of an automatic gear shifting device for an electric starter.19th Dec 1921Box 40 \ 5  Scan077
The reverse side of a photograph or document page with a purple ink date stamp.28th Dec 1921Box 40 \ 5  Scan078
Technical drawing of a Bijur Inboard Type Sleeve Shift with dimensions.6th Jan 1921Box 40 \ 5  Scan079
The reverse side of a document showing a purple ink reception stamp from the print department.14th Mar 1921Box 40 \ 5  Scan080


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