| Description | Date | Identifier | |
| Instructions regarding blueprints for the Wraith 11 petrol tank. | 28th Jan 1938 | Box 10 \ 2 02-page43 | |
| Requesting the scheme for the remote vent tube (FCD.489) on the Wraith petrol tank be applied to the first 100 chassis. | 28th Feb 1938 | Box 10 \ 2 02-page45 | |
| Report cover sheet for the Aero Engine Design Department outlining publication restrictions. | 23th Sep 1929 | Box 10 \ 2 02-page46 | |
| Instruction to change the petrol filler elbow lower connection tube for the 25/30 HP (Wraith III) petrol tank. | 29th Nov 1938 | Box 10 \ 2 02-page47 | |
| Modification to the oil pump drive for later Kestrel aero engines. | 11th Sep 1936 | Box 10 \ 2 02-page48 | |
| Advising against soldering the petrol feed pipe to the anti-surge tower on Wraith models due to vibration concerns. | 27th Feb 1939 | Box 10 \ 2 02-page49 | |
| The document is completely illegible due to severe fading and poor image quality. | 16th Mar 1939 | Box 10 \ 2 02-page50 | |
| Petrol supply failure on the Wraith model due to the feed pipe design. | 16th Mar 1939 | Box 10 \ 2 02-page51 | |
| Test report comparing the breaking load of riveted and welded petrol tank support straps for the Wraith model. | 5th Apr 1939 | Box 10 \ 2 02-page53 | |
| Heavily faded and almost entirely illegible typed document. | 12th Apr 1939 | Box 10 \ 2 02-page54 | |
| The practicality of spotwelding Wraith petrol tank straps. | 12th Apr 1939 | Box 10 \ 2 02-page55 | |
| The petrol filler pipe for the Wraith chassis being too short, suggesting a Phantom III part as an alternative. | 24th May 1939 | Box 10 \ 2 02-page57 | |
| Test report detailing a modification to a gilled cooler fitting on Kestrel engines to resolve a 'kink' issue. | 31th Aug 1939 | Box 10 \ 2 02-page58 | |
| Cost-saving and reliability improvement by changing the petrol pumps for the next 100 Wraith chassis. | 6th Jul 1939 | Box 10 \ 2 02-page59 | |
| Fault with Wraith HP petrol pumps causing fuel siphoning and a potential fire risk. | 20th Nov 1940 | Box 10 \ 2 02-page61 | |
| Outlining Mr. Royce's questions regarding engine side thrust, connecting rods, and crank web designs. | 22th Nov 1940 | Box 10 \ 2 02-page62 | |
| Customer issues and maintenance procedures for Wraith high-pressure petrol pumps. | 23th Nov 1940 | Box 10 \ 2 02-page63 | |
| Heavily faded, typewritten internal procedural notice or memorandum. | 23th Nov 1940 | Box 10 \ 2 02-page64 | |
| Urgent memo regarding noise from bouncing engine oil relief valves on the Wraith II and the proposed solution. | 22th Jan 1937 | Box 10 \ 3 03-page001 | |
| Test of an Aero Carburettor II Circuit following modifications to the diffuser tube. | 26th Mar 1934 | Box 10 \ 3 03-page002 | |
| Initial test results and issues with the Wraith oil relief valve and filter system. | 28th Jan 1937 | Box 10 \ 3 03-page003 | |
| Analysis of cooling test data and radiator drag for the Fairey 'Battle' aircraft. | 22th Dec 1938 | Box 10 \ 3 03-page004 | |
| Comparing different oil filter and pressure relief valve systems, recommending the use of the external filter LeC.4692. | 28th Jan 1937 | Box 10 \ 3 03-page005 | |
| Study on the aerodynamic efficiency of fixed and variable pitch aerial propellers. | 28th Jan 1937 | Box 10 \ 3 03-page006 | |
| The necessity of the LeC.4412 rocker control relief valve and results of a 10,000-mile test. | 28th Jan 1937 | Box 10 \ 3 03-page007 | |
| Addendum regarding increasing oil pressure in the Falcon III engine by replacing a spring. | 4th Dec 1918 | Box 10 \ 3 03-page008 | |
| Request for double sets of valve gear for the Wraith II engine to be made from Low Carbon Case Hardening Steel for testing. | 12th Feb 1937 | Box 10 \ 3 03-page009 | |
| Notice of cancellation for a drawing of B.HP & petrol consumption curves for the 'F' type engine. | 18th Nov 1927 | Box 10 \ 3 03-page010 | |
| Testing new Bentley valve springs on the Wraith III engine. | 1st Mar 1937 | Box 10 \ 3 03-page011 | |
| Typed document where the text is too faded to be read. | 3rd Mar 1937 | Box 10 \ 3 03-page012 | |
| Secret memo detailing modified valve rockers for the Wraith III model to suit a reduced cam lift. | 3rd Mar 1937 | Box 10 \ 3 03-page013 | |
| Specifications for the Wraith III valve lift curve, modifying the cam base circle diameter. | 3rd Mar 1937 | Box 10 \ 3 03-page015 | |
| The special radiator and shutter for Phantom II Chassis No. 182 JS. | 15th Dec 1930 | Box 10 \ 3 03-page016 | |
| Tests carried out on Wraith III valve gear springs on a Bentley unit. | 16th Mar 1937 | Box 10 \ 3 03-page017 | |
| From the Aero Engine Department regarding modifications to carburettor controls. | 9th Sep 1936 | Box 10 \ 3 03-page018 | |
| Test report tabulating results of valve bouncing with different spring sets at various engine speeds. | 16th Mar 1937 | Box 10 \ 3 03-page019 | |
| Heavily faded carbon copy of an internal memo regarding an experimental chassis. | 28th Aug 1944 | Box 10 \ 3 03-page020 | |
| Valve spring lengths for a Wraith III engine valve gear. | 18th Jan 1937 | Box 10 \ 3 03-page021 | |
| Consultation with Vauxhall regarding issues with Wraith tappets. | 16th Jun 1937 | Box 10 \ 3 03-page023 | |
| The document is completely illegible due to severe fading and low image quality. | 16th Jun 1937 | Box 10 \ 3 03-page024 | |
| Noisy camshafts, comparing them with Vauxhall and Chevrolet designs, and discussing tappet issues. | 16th Jun 1937 | Box 10 \ 3 03-page025 | |
| Blueprint detailing the casting and finished dimensions for a Vauxhall valve tappet. | 19th Jun 1937 | Box 10 \ 3 03-page027 | |
| Blank sheet of headed paper from the Print Room in Derby. | 19th Jun 1937 | Box 10 \ 3 03-page028 | |
| Technical drawing for a Vauxhall Valve Tappet. | 19th Jun 1937 | Box 10 \ 3 03-page029 | |
| Blank document with a 'Print Room' stamp from the Derby facility. | 19th Jun 1937 | Box 10 \ 3 03-page030 | |
| Blueprint detailing the specifications for a Vauxhall Valve Tappet. | 19th Jul 1937 | Box 10 \ 3 03-page031 | |
| Cover sheet for documents related to Wraith Tappets. | 19th Jul 1937 | Box 10 \ 3 03-page032 | |
| Comparison of the weights of Chevrolet and Wraith valve gear components. | 18th Jun 1937 | Box 10 \ 3 03-page033 | |
| Alteration note detailing modifications to a drawing or part. | 8th Apr 1931 | Box 10 \ 3 03-page034 | |
| Comparison of camshaft and tappet displacement specifications between a Chevrolet and a Wraith. | 18th Jun 1937 | Box 10 \ 3 03-page035 | |
| Trip to Belfast regarding high-speed cutting fluids. | 27th Feb 1932 | Box 10 \ 3 03-page036 | |
| Comparison of valve spring loads between a Chevrolet and a Wraith engine. | 18th Jun 1937 | Box 10 \ 3 03-page037 | |
| Heavily faded typewritten memorandum or test report form. | 10th Oct 1938 | Box 10 \ 3 03-page038 | |
| Request for the production of specific tappet guides and top spring washers for the Wraith III model. | 25th Jun 1937 | Box 10 \ 3 03-page039 | |
| Instructions for fitting valve springs and top washers to Wraith III units. | 9th Jul 1937 | Box 10 \ 3 03-page041 | |
| This document is unreadable due to the extremely poor quality and faded nature of the image. | 12th Jul 1937 | Box 10 \ 3 03-page042 | |
| Instruction to manufacture a set of Wraith III push rods with a new diameter of .312. | 12th Jul 1937 | Box 10 \ 3 03-page043 | |
| Trials to determine the temperature drop of water passing through condenser tubes. | 5th Oct 1911 | Box 10 \ 3 03-page044 | |
| The machining of 24 tappet blanks for Wraith III units. | 12th Jul 1937 | Box 10 \ 3 03-page045 | |
| Extremely faint and illegible typed document. | 9th Aug 1937 | Box 10 \ 3 03-page046 | |
| Urgent request for drawings of the valve mechanism of the Wraith engine. | 9th Aug 1937 | Box 10 \ 3 03-page047 | |
| Heavily faded document where the content is illegible. | 4th Aug 1937 | Box 10 \ 3 03-page048 | |
| List of drawings required for experiments on Wraith engine rockers and bottom tappets. | 4th Aug 1937 | Box 10 \ 3 03-page049 | |
| Experimental modification to valve rockers on the Wraith III to reduce valve lift. | 19th Aug 1937 | Box 10 \ 3 03-page051 | |
| Experimental modification to the Wraith III valve rockers to reduce valve lift. | 19th Aug 1937 | Box 10 \ 3 03-page053 | |
| Requesting the production of experimental Wraith tappet guides to test using the crankcase material directly. | 24th Aug 1937 | Box 10 \ 3 03-page055 | |
| Issues with Merlin engine fuel and requesting a sample of a different fuel type. | 18th Dec 1934 | Box 10 \ 3 03-page056 | |
| Instructions to fit different material tappet bushes to a Wraith III No. 6 unit for a comparative wear test. | 25th Aug 1937 | Box 10 \ 3 03-page057 | |
| Delay to engine/vehicle C.P.E.9 due to a leaking supplementary petrol tank. | 26th Feb 1913 | Box 10 \ 3 03-page058 | |
| Coolant jet tests for the Wraith III engine, comparing different jet configurations and recommending deletion from the specification. | 27th Aug 1937 | Box 10 \ 3 03-page059 | |
| The examination of Goshawk supercharger gears and proposed modifications to prevent fatigue cracks. | 28th Jun 1938 | Box 10 \ 3 03-page060 | |
| Examination of a broken exhaust valve from a Wraith vehicle following a failure. | 1st Sep 1937 | Box 10 \ 3 03-page061 | |
| Experimental condensed report on a 50-hour test and strip-down examination of a Condor III engine. | 23th Feb 1934 | Box 10 \ 3 03-page062 | |
| Urgent request to modify the Wraith valve gear by altering the rocker ratio. | 2nd Sep 1937 | Box 10 \ 3 03-page063 | |
| Confirming the dispatch of experimental 'B' pistons and connecting rods for an Eagle engine. | 8th Sep 1919 | Box 10 \ 3 03-page064 | |
| Modification to the tappets for the Wraith III model. | 6th Apr 1937 | Box 10 \ 3 03-page065 | |
| Minute detailing the Air Ministry's approval and required modifications for the Hucknall Extension project. | 26th Sep 1938 | Box 10 \ 3 03-page066 | |
| Modification to the tappets for the Wraith III model. | 4th Sep 1937 | Box 10 \ 3 03-page067 | |
| Instructions to representatives regarding the return procedure for defective or damaged material. | 31th Mar 1938 | Box 10 \ 3 03-page068 | |
| Instruction to chromium plate half a set of special bottom tappets for a 15,000 miles test on a Phantom III No.14 Unit. | 7th Sep 1937 | Box 10 \ 3 03-page069 | |
| Proposal to modify Wraith III valve guides by removing gland packings and experimenting with a new type on inlet valves only. | 7th Sep 1937 | Box 10 \ 3 03-page071 | |
| Page with completely faded and illegible text. | 10th Sep 1937 | Box 10 \ 3 03-page072 | |
| Laboratory report on the failure analysis of Wraith 26.C.VI KE.965 exhaust valves. | 10th Sep 1937 | Box 10 \ 3 03-page073 | |
| Confirmation memo regarding fitting dual ignition systems to Kestrel XIV, XV, and XVI engines. | 29th Aug 1935 | Box 10 \ 3 03-page074 | |
| Laboratory report showing photographs of a cracked and a broken exhaust valve from a Wraith. | 10th Sep 1937 | Box 10 \ 3 03-page075 | |
| Laboratory report featuring a cross-section photograph of a cast metal component. | 10th Sep 1937 | Box 10 \ 3 03-page077 | |
| Blank page or cover from a document. | 9th Sep 1937 | Box 10 \ 3 03-page078 | |
| Order for 10 - 4x17 wire wheels to be placed. | 9th Sep 1937 | Box 10 \ 3 03-page079 | |
| Instruction memo detailing modifications to the Wraith III Chassis, specifically valves and fittings. | 29th Sep 1937 | Box 10 \ 3 03-page081 | |
| Proposal to modify supercharger gear teeth for the Merlin engine to improve contact and increase service life. | 13th Nov 1939 | Box 10 \ 3 03-page082 | |
| Modifications to the Phantom and Wraith valve gear for improved lubrication. | 1st Oct 1937 | Box 10 \ 3 03-page083 | |
| Road test report on the first 20 HP Chassis, G.A.61, noting issues with the speedometer, clutch, and gearing. | 18th Nov 1924 | Box 10 \ 3 03-page084 | |
| Revised oil relief valves for the Wraith III to suit high front engine mounting. | 2nd Oct 1937 | Box 10 \ 3 03-page085 | |
| The testing of an experimental chassis. | 28th May 1921 | Box 10 \ 3 03-page086 | |
| The in-house production of Wraith III bottom tappets and the modification of drawing EW.1413. | 4th Oct 1937 | Box 10 \ 3 03-page087 | |
| Suggesting a revision to the wording for a notice about engines fitted with two-speed superchargers. | 3rd Sep 1929 | Box 10 \ 3 03-page088 | |
| Production instructions for an Oil Relief Valve for the Wraith III Chassis. | 15th Oct 1937 | Box 10 \ 3 03-page089 | |
| Modification record sheet, though the main content and list details are illegible. | 28th May 1934 | Box 10 \ 3 03-page090 | |
| Proposal for an experimental scheme to test a balancing cam on an existing Bentley engine. | 28th Oct 1937 | Box 10 \ 3 03-page091 | |
| Investigation into valve gear trouble on the Wraith III model due to a collapsing grummet. | 8th Nov 1937 | Box 10 \ 3 03-page093 | |
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