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