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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Simple pencil sketch of a diagram with four nodes.6th May 1927Box 37 \ 1  scan 312
Ignition timing diagram for the E.A.C.10 engine.26th Sep 1928Box 37 \ 1  scan 313
Heavily faded document, possibly a carbon copy, with a handwritten reference number and an ink date stamp.28th Sep 1928Box 37 \ 1  scan 314
Specification sheet comparing present and revised ignition timing settings for the Phantom engine.27th Sep 1928Box 37 \ 1  scan 315
Request for a quotation on a rectifier set for charging chassis batteries from an alternating current supply.18th Dec 1929Box 37 \ 1  scan 316
Obtaining a quotation for a car dynamo rectifier unit from the Westinghouse Brake & Saxby Signal Co.8th Dec 1929Box 37 \ 1  scan 317
Visit from Herbert Frood to discuss his Ferodo asbestos material for use in plate clutches.21th Dec 1918Box 37 \ 2  scan 001
Different materials for clutch plates, including asbestos and cotton-based compounds, and a scheme to prevent rusting.21th Dec 1918Box 37 \ 2  scan 002
Impregnating spring material with graphite or emery to improve shock damping effects.12th Dec 1918Box 37 \ 2  scan 003
Test results for different friction materials at varying temperatures.12th Dec 1918Box 37 \ 2  scan 004
Obtaining a new pressed asbestos material for the Friction Anchored Sun Wheel as the previously used Ferodo was unsatisfactory.8th Jan 1919Box 37 \ 2  scan 005
Letter from The Herbert Frood Company regarding tests on material samples No. 9.L. and No. 9.C.7th Jan 1919Box 37 \ 2  scan 006
Office order to purchase 24 plates of hard pressed wire-woven asbestos from Messrs Herbert Frood Ltd.26th Apr 1917Box 37 \ 2  scan 007
Sample of a new friction material from Messrs. Herbert Frood for the 'Eagle' engine's epicyclic gear.1st Apr 1919Box 37 \ 2  scan 008
Notification regarding the receipt of a hard-pressed wire-woven asbestos disc for friction anchorage gear.8th Apr 1919Box 37 \ 2  scan 009
To Mr. Clark detailing the receipt of various parts from suppliers for experiments.11th Apr 1919Box 37 \ 2  scan 010
Receipt of parts including felt washers, mica, and bearings for experiments.2nd Jun 1919Box 37 \ 2  scan 011
Cancellation of an experiment on hard pressed wire woven asbestos discs for friction anchorage.18th Sep 1919Box 37 \ 2  scan 012
Letter to Herbert Frood, Ltd. requesting a small order of hard pressed wire woven asbestos friction plates for aero engines.31th Dec 1918Box 37 \ 2  scan 013
Urgent request to the Print Room for a print of a tracing for a Chassis Bearing Bracket.9th Apr 1919Box 37 \ 2  scan 014
Print of a bearing bracket arrangement drawing.1st May 1919Box 37 \ 2  scan 015
Requesting dimensions for a Bearing Bracket Drawing following a test on brush positions.1st May 1919Box 37 \ 2  scan 016
From EFC to Mr. Coverley regarding a print for the arrangement of a bearing and bracket on a chassis.3rd Jun 1919Box 37 \ 2  scan 017
Assembly completion list for Chassis 1. E.X., detailing fitted components and their part numbers.30th Jun 1919Box 37 \ 2  scan 018
Print for a bearing bracket.9th Aug 1919Box 37 \ 2  scan 019
Supplying electrical starter sets with Lucas and C.A.V. motors for Eagle engines to be tested on a cruiser flying boat.14th Feb 1918Box 37 \ 2  scan 020
Confirmation of a telegram regarding Lucas's decision on an unbalanced reduction gear arrangement.17th Jun 1918Box 37 \ 2  scan 021
Letter from the Air Board Office regarding a modified reduction gear design for electric starting motors.28th Jun 1918Box 37 \ 2  scan 022
Page 2 of a letter regarding difficulties in adopting a new armature shaft design for bulk production.26th Apr 1917Box 37 \ 2  scan 023
Cover note for an attached telegram requesting an experiment be carried out.3rd Jul 1918Box 37 \ 2  scan 024
Telegram from Mr. Elliott requesting the pressure required to slide the Eagle starter gear into mesh.3rd Jul 1918Box 37 \ 2  scan 025
Instruction to cease work on electrical starter schemes for Eagle engines in favour of a new standard design by Mr. Royce.3rd Jul 1918Box 37 \ 2  scan 026
Specification regarding the force required on the lever for an electrical starter gear.4th Jul 1918Box 37 \ 2  scan 027
Directive to stop work on specific reduction gear parts for the electric starter due to a new design.4th Jul 1918Box 37 \ 2  scan 028
Note specifying the thirteen pounds of force required on lever E.15414 to engage the starter jaws.4th Mar 1915Box 37 \ 2  scan 029
'Eagle' electrical starter, associated drawings, and required modifications.10th Jul 1918Box 37 \ 2  scan 030
Alteration of worm gearing ratios and the forwarding of documents to the Air Board.10th Jul 1918Box 37 \ 2  scan 031
Letter to the Air Board regarding a new design for an electrical starter for aircraft engines.10th Jul 1918Box 37 \ 2  scan 032
Proposal for redesigning the starter gear for the Eagle engine to reduce cost while maintaining strength.30th Dec 1918Box 37 \ 2  scan 033
Letter regarding modifications required for a Lucas electric starter motor to be fitted to an aero engine.10th Jul 1918Box 37 \ 2  scan 034
Design and fitting of a Lucas electric starter motor for an aero engine.10th Jul 1918Box 37 \ 2  scan 035
Continued document discussing motor gear and heavy timber engine supports on seaplanes.26th Apr 1917Box 37 \ 2  scan 036
Confirming the attachment of documents LeC.968 and LeC.969 concerning the Eagle Electrical Starter.12th Jul 1918Box 37 \ 2  scan 037
Blueprints for the Eagle Electrical Self Starter.12th Jul 1918Box 37 \ 2  scan 038
Design modifications for the 'Eagle' electrical starter, including new drawings and bracket lightening holes.12th Jul 1918Box 37 \ 2  scan 039
Modifications for an aeroplane's hand starter mechanism.16th Jul 1918Box 37 \ 2  scan 040
Covering memo for a copy of the Eagle Electrical Starter Control Gear document.16th Jul 1918Box 37 \ 2  scan 041
Parts for an 'Eagle' engine electrical self-starter experiment.22th Jul 1918Box 37 \ 2  scan 042
Listing parts for an 'Eagle' engine electrical self-starter and requesting three sets for testing.29th Jul 1918Box 37 \ 2  scan 043
Letter from Joseph Lucas Limited regarding their inability to manufacture the Rolls-Royce design of reduction gear for starting motors.30th Jul 1918Box 37 \ 2  scan 044
Request to place an order with the Lucas Company for 12 small type aero engine motors, type A.650.26th Sep 1918Box 37 \ 2  scan 045
Order for Lucas electrical self-starter motors for 'Eagle' engines and potential manufacturing issues with shafts.5th Oct 1918Box 37 \ 2  scan 046
Receipt of Control Springs for the Electrical Starter Reduction from G. Salter & Co.15th Oct 1918Box 37 \ 2  scan 047
Design modification issue for a starter motor with supplier Messrs. Lucas.25th Oct 1918Box 37 \ 2  scan 048
Delay and shared responsibility with Lucas regarding a fault found in an electrical starter blueprint.25th Oct 1918Box 37 \ 2  scan 049
Modifications to the 'Eagle' Electrical Starter in response to objections from Messrs. Lucas regarding a ball bearing position.31th Oct 1918Box 37 \ 2  scan 050
Design changes and instructions for various engine components including a planet pinion and epicyclic gear.31th Oct 1918Box 37 \ 2  scan 051
Notification regarding the receipt of Starter Oil Retaining Spinnings for an electric self-starter.1st Nov 1918Box 37 \ 2  scan 052
Cover note for LeC. No.1020 regarding modifications to the Eagle Electrical Starter to suit Lucas Requirements.5th Nov 1918Box 37 \ 2  scan 053
Letter to Joseph Lucas Ltd. regarding an issue with the epicyclic gear for starting motors.6th Nov 1918Box 37 \ 2  scan 054
Lubrication and cantilever design modifications for the 'Eagle' electrical starter.6th Nov 1918Box 37 \ 2  scan 055
Instruction to cancel parts for a superseded electrical starter for aero engines due to a new design.8th Nov 1918Box 37 \ 2  scan 056
Querying the status of an unfulfilled order for Eagle electric starter motors.14th Nov 1918Box 37 \ 2  scan 057
Notice to hold all work on a list of parts for the 'Eagle' engine electrical self-starter due to a revision.9th Nov 1918Box 37 \ 2  scan 058
Issue of a print for a Lucas Motor Shaft End for the 'Eagle' engine's electrical self-starter.15th Nov 1918Box 37 \ 2  scan 059
Listing parts and drawings for an 'Eagle' engine electrical self-starter.21th Nov 1918Box 37 \ 2  scan 060
Letter to tester F. Cliburn about his illness with the 'Flu' and the urgent need for test figures for the 'C' engine.13th Nov 1918Box 37 \ 2  scan 061
Experiment on magneto brackets with improved lugs for the 'C' engine.13th Dec 1918Box 37 \ 2  scan 062
Unsuitable design for electrical starters on aero engines, leading to production issues and a disagreement with the Air Board.30th Dec 1918Box 37 \ 2  scan 063
Instruction to alter the quantity of experimental electrical starters for Eagle Engines from three sets to one.30th Dec 1918Box 37 \ 2  scan 064
Reduction of experimental electrical starter sets for Eagle engines from three to one.30th Dec 1918Box 37 \ 2  scan 065
The supply of an armature spindle to Messrs. Lucas for a sample electrical starter for Eagle engines.22th Jan 1919Box 37 \ 2  scan 066
Standardising C.M.3 Morganite starter motor brushes to replace the C.M. type.16th Jan 1920Box 37 \ 2  scan 067
Letter to American Supplies Co. Ltd. regarding sparking plugs and the supply of 12 Cylinder Magnetos.23th May 1918Box 37 \ 2  scan 068
The failure of 'Splitdorf' sparking plugs during testing in an aero engine.9th Jul 1918Box 37 \ 2  scan 069
Letter from Splitdorf Electrical Co. confirming they are sending 12 Common Sense Spark Plugs for testing.17th Dec 1920Box 37 \ 2  scan 070
Request to send an official order for one dozen Splitdorf sparking plugs.21th Dec 1920Box 37 \ 2  scan 071
Extract from a report on a visit to the Delco Factory, discussing generators, contact breakers, and ignition systems.17th Apr 1918Box 37 \ 2  scan 072
The design and manufacturing of starting motors and dynamos by Delco.17th Apr 1918Box 37 \ 2  scan 073
Description of a hardened gear and ground band pressed into a soft wheel for a free wheel's rollers.17th Apr 1918Box 37 \ 2  scan 074
Order for 8 Carbon Brushes for a Liberty Dynamo.13th Jun 1918Box 37 \ 2  scan 075
Query on calculating the number of turns per coil for a Liberty dynamo based on its armature resistance measurements.15th Jun 1918Box 37 \ 2  scan 076
Confirmation to prepare a 'Liberty' dynamo for a bench test involving a temporary bearing.2nd Jul 1918Box 37 \ 2  scan 077
Notification of received parts available for collection at the stores.4th Jul 1918Box 37 \ 2  scan 078
From EFC to Mr. Coverley listing a series of urgent experimental jobs.14th Aug 1918Box 37 \ 2  scan 079
Confirming the 'Liberty' dynamo for experiment X.3306 is ready for testing.2nd Oct 1918Box 37 \ 2  scan 080
List detailing the weights of four different models of dynamos.14th Mar 1919Box 37 \ 2  scan 081
Technical article about the Liberty Engine, focusing on its ignition system and electrical diagrams.5th Feb 1919Box 37 \ 2  scan 082
Advertisement for The Aircraft Manufacturing Company (AIRCO) promoting their air service between London and Paris for the Peace Conference.5th Feb 1919Box 37 \ 2  scan 083
Detailed explanation of the carburetion, oiling, and cooling systems of the Liberty Twelve engine, including ignition and oil pump diagrams.5th Feb 1919Box 37 \ 2  scan 084
Advertisement page for 'The Aeroplane Library' listing several aviation-related books for sale.5th Feb 1919Box 37 \ 2  scan 085
Test results for a Liberty dynamo's cut-out point under plain shunt cold conditions at 21°C.7th Jun 1920Box 37 \ 2  scan 086
Test results sheet for a Liberty dynamo's output under hot conditions.8th Jun 1920Box 37 \ 2  scan 087
Instruction sheet detailing test results for a Liberty Dynamo under cold conditions.7th Jun 1920Box 37 \ 2  scan 088
Test results for a Liberty dynamo, showing speed versus volts under hot conditions.8th Jun 1920Box 37 \ 2  scan 089
Instruction note regarding the acquisition of a Liberty Dynamo from stores for experimental purposes.26th Jul 1919Box 37 \ 2  scan 090
Specification details for the 'Liberty' Shunt Wound Dynamo, including weights, air gap, field and armature circuits.7th Aug 1920Box 37 \ 2  scan 091
Specifications for an armature winding, including materials, dimensions, and testing results.19th Jul 1917Box 37 \ 2  scan 092
Specification sheet detailing the dimensions and installation of four brushes.19th Jul 1917Box 37 \ 2  scan 093
Extract regarding a list of suggested dynamo parts for Mr. Royce, noting their design is based on the Bosch machine.18th Aug 1920Box 37 \ 2  scan 094


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