| Description | Date | Identifier | |
| Letter from the Air Board Technical Dept. requesting a reply regarding carburettors for engines. | 5th Mar 1918 | Box 37 \ 2 scan 195 | |
| Responding to an Air Board query about R.R.C.H. carburettors, disputing the results of R.A.F. tests. | 8th Mar 1918 | Box 37 \ 2 scan 196 | |
| Carburetter test results, the efficiency of the R.R.C.H. type, and a proposal to test an improved C.H.7 carburetter on an 'Eagle' engine. | 1st Mar 1918 | Box 37 \ 2 scan 197 | |
| Reply to the Air Board regarding a letter about carburettors for engines. | 5th Mar 1918 | Box 37 \ 2 scan 198 | |
| Letter from the Air Board Technical Department requesting a reply concerning engine carburetters. | 5th Mar 1918 | Box 37 \ 2 scan 199 | |
| Letter from the Royal Flying Corps regarding carburettor adjustments and throttle control issues on an experimental Eagle engine. | 17th Sep 1917 | Box 37 \ 2 scan 200 | |
| Report page concluding on an engine trial, noting good performance despite slight carburetter trouble. | 26th Apr 1917 | Box 37 \ 2 scan 201 | |
| Modifications to the Claudel-Hobson carburetter diffuser jet for Condor, Eagle, and Falcon engines. | 29th Jul 1918 | Box 37 \ 2 scan 202 | |
| Modifications to the pilot jet tube for Condor, Eagle, and Falcon carburetters. | 29th Jul 1918 | Box 37 \ 2 scan 203 | |
| Future design work procedures for the Claudel-Hobson jet. | 15th Feb 1916 | Box 37 \ 2 scan 204 | |
| Letter from a rubber manufacturer regarding a sample of 'RUBMETAL' for testing purposes. | 8th Jun 1917 | Box 37 \ 3 scan 001 | |
| Request to test a sample of No.5 Rubmetal against the rubber joints currently used on Aero Engines or Chassis Water Connections. | 27th Jun 1917 | Box 37 \ 3 scan 002 | |
| Requesting the testing of a 'Rubmetal' rubber sheeting sample for use in water connections. | 28th Jun 1917 | Box 37 \ 3 scan 003 | |
| From RHC to EFC listing completed experiments ready for fitting to an engine. | 12th Feb 1918 | Box 37 \ 3 scan 004 | |
| Tests on using hydrogen to prime engines for easier starting. | 2nd Oct 1917 | Box 37 \ 3 scan 005 | |
| Requesting to push forward the testing of a hydrogen priming device. | 19th Feb 1918 | Box 37 \ 3 scan 006 | |
| Approval letter from the Air Board for a hydrogen priming device on new primers for Eagle and Falcon engines. | 16th Feb 1918 | Box 37 \ 3 scan 007 | |
| Extract outlining a rough specification for a modified Eagle engine, focusing on carburettor and ignition system alterations. | 27th Sep 1917 | Box 37 \ 3 scan 008 | |
| Letter regarding drawings for the Battery Ignition system for the Eagle and Falcon engines, with requests for prints and design modifications. | 2nd Oct 1917 | Box 37 \ 3 scan 009 | |
| Modifications to the Remy ignition system, its coupling, and control gear, with comparisons to the 'Falcon' and 'Eagle' engine designs. | 9th Aug 1917 | Box 37 \ 3 scan 010 | |
| And proposing modifications to the interconnected controls for a Magneto Remy-Ignition system. | 13th Oct 1917 | Box 37 \ 3 scan 011 | |
| Controls and synchronisation for Magneto and Remy ignition systems on 'Falcon' and 'Eagle' engines. | 15th Oct 1917 | Box 37 \ 3 scan 012 | |
| Explaining the function of the hand starting magneto as a backup system for battery ignition. | 9th Jun 1917 | Box 37 \ 3 scan 013 | |
| Interconnection of magneto and battery ignition on airship engines, raising concerns about timing and potential backfires. | 16th Oct 1917 | Box 37 \ 3 scan 014 | |
| The interconnection of magneto and battery ignition controls on air-ship and Eagle engines. | 18th Oct 1917 | Box 37 \ 3 scan 015 | |
| Adjustments to the battery ignition control range and subsequent test results on a low compression airship engine. | 27th Oct 1917 | Box 37 \ 3 scan 016 | |
| Continuation of a report on diagnosing an engine issue by syringing water onto the distributor and coil. | 27th Oct 1917 | Box 37 \ 3 scan 017 | |
| Request to test a fixed jet to replace the altitude control on commercial machines operating on the Paris Service. | 1st Aug 1921 | Box 37 \ 3 scan 018 | |
| Letter from Robinhood Engineering Works regarding new Spring Terminal Clips for K.L.G. sparking plugs. | 21th Sep 1917 | Box 37 \ 3 scan 019 | |
| Order office note concerning Spring Terminal Clips for Robinhood Engineering Co. | 24th Sep 1917 | Box 37 \ 3 scan 020 | |
| Letter to The Robinhood Engineering Co. regarding a short shipment of Spring Terminal Clips. | 4th Oct 1917 | Box 37 \ 3 scan 021 | |
| Advice note from The Robinhood Engineering Works for clips for K.L.G. sparking plugs. | 5th Oct 1917 | Box 37 \ 3 scan 022 | |
| Order for 24 K.L.S. clips for sparking plugs from Robinhood Engineering Co. | 6th Oct 1917 | Box 37 \ 3 scan 023 | |
| The testing of special spring terminal clips for sparking plugs. | 10th Oct 1917 | Box 37 \ 3 scan 024 | |
| Requesting testing and a report on a sample Spring Terminal Clip received from The Robinhood Engineering Works, Ltd. | 10th Oct 1917 | Box 37 \ 3 scan 025 | |
| Instruction note from the Aluminium Foundry requesting an order number for pistons to be made from Hall's special metal. | 15th Oct 1917 | Box 37 \ 3 scan 026 | |
| Note specifying the metallic composition of standard pistons under reference X.3198. | 15th Oct 1917 | Box 37 \ 3 scan 027 | |
| Experiments fitted to an Eagle 'A' engine. | 12th Feb 1918 | Box 37 \ 3 scan 028 | |
| The metallic composition for standard pistons, noting the experiment is superseded. | 7th Sep 1918 | Box 37 \ 3 scan 029 | |
| Pistons made from Mr. Hall's special metal for the 'Condor' engine. | 13th Dec 1918 | Box 37 \ 3 scan 030 | |
| Porosity issues with a special 'H' Alloy aluminium piston and proposed casting solutions. | 21th May 1919 | Box 37 \ 3 scan 031 | |
| Urgent experiment to modify an anchor ring by removing internal beading and machining the web. | 29th Aug 1917 | Box 37 \ 3 scan 032 | |
| Confirming the fitting of a special Anchor Ring without internal beading to a 'Falcon' B engine. | 13th Oct 1917 | Box 37 \ 3 scan 033 | |
| Requesting an opinion on 'Fastnut' washers for potential testing. | 29th Aug 1917 | Box 37 \ 3 scan 034 | |
| Dismissing the use of 'Fastnut' washers following a negative report from Mr. Hives. | 19th Sep 1917 | Box 37 \ 3 scan 035 | |
| Letter detailing improvements in a new Watford magneto ignition system for use on engines. | 21th Aug 1917 | Box 37 \ 3 scan 036 | |
| Magneto and battery ignition systems for 'Eagle' aero engines. | 13th Nov 1916 | Box 37 \ 3 scan 037 | |
| The development of an electrical starting device for the 'Eagle' engine. | 13th Nov 1916 | Box 37 \ 3 scan 038 | |
| The concluding page of a set of notes from the Engineer-in-chief. | 28th Aug 1917 | Box 37 \ 3 scan 039 | |
| Request to test a new magneto model for future aero engines. | 28th Aug 1917 | Box 37 \ 3 scan 040 | |
| Instructing the handover of two 'CC' Watford Magnetos to Mr. Hives for testing and reporting. | 5th Sep 1917 | Box 37 \ 3 scan 041 | |
| Letter to the Controller of the Air Board Office discussing improvements to Watford magnetos. | 21th Aug 1917 | Box 37 \ 3 scan 042 | |
| The design and implementation of jump spark and battery ignition systems for 'Eagle' aero engines. | 21th Aug 1917 | Box 37 \ 3 scan 043 | |
| Design of an electrical starting device for the 'Eagle' engine. | 8th Sep 1917 | Box 37 \ 3 scan 044 | |
| Technical note on the new C.6 type Watford Magnetos, detailing alterations and comparisons to the previous model. | 8th Sep 1917 | Box 37 \ 3 scan 045 | |
| Continued page of a report on the testing and weight comparison of duralumin and steel rocker arms. | 18th Oct 1917 | Box 37 \ 3 scan 046 | |
| Cancellation of an experiment on a magneto type for future aero engines. | 18th Oct 1917 | Box 37 \ 3 scan 047 | |
| Departmental memo to Mr. Hives about a sketch for a clutch jack, including a humorous handwritten note. | 28th May 1919 | Box 37 \ 3 scan 048 | |
| Hand-drawn sketch of a lever mechanism with an aluminium heel plate and a cross-section of a vertical link. | 30th Jun 1919 | Box 37 \ 3 scan 049 | |
| Modification of a Michelin jack to make it suitable for their vehicles, specifically by reducing its height. | 30th Jun 1919 | Box 37 \ 3 scan 051 | |
| Procuring a suitable chassis jack from a supplier, discussing sample sizes. | 17th Oct 1919 | Box 37 \ 3 scan 052 | |
| Product leaflet for 'The Speedily Jack' detailing its operation, specifications, and prices for different models. | 1st Jan 1919 | Box 37 \ 3 scan 053 | |
| Promotional leaflet for 'The Speedily Jack' detailing its features and operation. | 21th Oct 1919 | Box 37 \ 3 scan 054 | |
| Letter from The Wolseley Sheep Shearing Machine Company introducing their 'Speedily Jack' for cars. | 21th Oct 1919 | Box 37 \ 3 scan 055 | |
| Comparing Michelin jacks to those from Lake & Elliott, recommending Michelin as the superior option. | 16th Dec 1919 | Box 37 \ 3 scan 056 | |
| Cover note for a circular concerning Hi-Lo Jacks. | 15th Apr 1920 | Box 37 \ 3 scan 057 | |
| To Mr Clark detailing the receipt of various parts including hydrometers, a jack, springs, and a dynamo. | 10th May 1920 | Box 37 \ 3 scan 058 | |
| Sending a Duff-Jack from the Duff Jack Sales Co. for testing in the Experimental Department. | 10th May 1920 | Box 37 \ 3 scan 059 | |
| Axle height measurements for jacking purposes and issues with the front axle jack pad. | 9th Jun 1920 | Box 37 \ 3 scan 060 | |
| Supply difficulty of Michelin Jacks and requesting an opinion on the Duff Jack as a temporary alternative. | 6th Jun 1920 | Box 37 \ 3 scan 061 | |
| Requesting a report on the testing of a Duff Jack. | 1st Aug 1920 | Box 37 \ 3 scan 062 | |
| Querying the origin of three motorcar jacks received from The Blackheath Garage. | 27th Apr 1921 | Box 37 \ 3 scan 063 | |
| Trial of three model jacks sent by a Mr. W.A. Chapman. | 13th May 1921 | Box 37 \ 3 scan 064 | |
| Specification for a jack for a 40/50 HP model fitted with 7-inch Dunlop low-pressure tyres. | 25th Sep 1924 | Box 37 \ 3 scan 065 | |
| Unsuitability of the standard jack for 20HP and 40/50 chassis fitted with Balloon Tyres. | 25th Sep 1924 | Box 37 \ 3 scan 066 | |
| Reporting on tests to determine the suitability of the standard jack with various sizes of balloon tyres. | 9th Apr 1926 | Box 37 \ 3 scan 067 | |
| The jack for the 7-EX model not shortening enough to fit under the front axle with medium pressure tyres. | 7th Jun 1926 | Box 37 \ 3 scan 068 | |
| Proposed housing for a jack and pump to avoid enlarging the running-board toolboxes. | 8th Mar 1927 | Box 37 \ 3 scan 069 | |
| Test report and review of the 'SKYHI' hydraulic jack, detailing its shortcomings. | 27th May 1927 | Box 37 \ 3 scan 070 | |
| Suitability of Rapson lifting jacks and the requirements for a new jack for the 'SS' model. | 1st Feb 1929 | Box 37 \ 3 scan 071 | |
| Assessment of a SKYHI Hydraulic Jack, Model No.163, detailing its dimensions, weight, and suitability for Phantom II cars. | 8th Jan 1930 | Box 37 \ 3 scan 072 | |
| Specifications for hydraulic jacks for the Phantom II and 20/25 HP chassis. | 11th Feb 1930 | Box 37 \ 3 scan 073 | |
| Design requirements and difficulties of hydraulic jacks for vehicles. | 28th Feb 1930 | Box 37 \ 3 scan 074 | |
| The merits and issues of the Dunlop Jack and Jackall System for jacking vehicles. | 28th Feb 1930 | Box 37 \ 3 scan 075 | |
| Required specifications for hydraulic jacks for company vehicles, including lift calculations. | 24th Feb 1930 | Box 37 \ 3 scan 076 | |
| Specifications for a car jack system and issues with existing models. | 17th Feb 1930 | Box 37 \ 3 scan 077 | |
| Clarifying the method for determining hydraulic jack dimensions for the Phantom II vehicle. | 17th Feb 1930 | Box 37 \ 3 scan 078 | |
| Calculations for determining jack requirements based on rear axle height and wheel dimensions. | 17th Feb 1930 | Box 37 \ 3 scan 079 | |
| Specifications and requirements for a suitable car jack. | 17th Feb 1930 | Box 37 \ 3 scan 080 | |
| Standardising D.W.S. jacks on the 40/50HP chassis to replace the screw jacks. | 5th Oct 1932 | Box 37 \ 3 scan 081 | |
| Letter from the Air Board Office discussing the Upton Lewis Testing Machine and requesting conductivity test results for aluminium alloys. | 24th Aug 1917 | Box 37 \ 3 scan 082 | |
| Instruction sheet detailing the relative conductivity test results for various metals and alloys. | 30th Aug 1917 | Box 37 \ 3 scan 083 | |
| The method used for conductivity tests on aluminum alloys. | 31th Aug 1917 | Box 37 \ 3 scan 084 | |
| Method for conducting conductivity tests on aluminium alloys. | 31th Aug 1917 | Box 37 \ 3 scan 085 | |
| Letter responding to a request for results of conductivity tests on Aluminium Alloys. | 3rd Sep 1917 | Box 37 \ 3 scan 086 | |
| Results of conductivity tests on aluminium alloys. | 3rd Sep 1917 | Box 37 \ 3 scan 087 | |
| Requesting reliability testing of various aluminium alloys for new 'Condor' Series III crankcases. | 7th Mar 1923 | Box 37 \ 3 scan 088 | |
| Plan to test the deflection of aluminium pieces using a rotating rig and under a static load over time. | 1st Jul 1923 | Box 37 \ 3 scan 089 | |
| Porosity of a piston alloy with 7% copper and proposing tests without zinc or tin. | 4th Sep 1917 | Box 37 \ 3 scan 090 | |
| Requesting six pistons made from a new 7% copper, 93% aluminium alloy for testing. | 6th Sep 1917 | Box 37 \ 3 scan 091 | |
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