| Description | Date | Identifier | |
| Letter discussing the design and material specifications for a 9' register axle, referencing drawing no. 3008/4. | 6th Jul 1936 | Box 7 \ 3 X 602 Axle Rear-page08 | |
| Letter from Ransome & Marles Bearing Co. Ltd. discussing a bearing mounting scheme for a differential. | 6th Jul 1930 | Box 7 \ 3 X 602 Axle Rear-page09 | |
| Specifications for the Wraith II rear axle banjo, tubes, hubs, and shafts. | 7th Jul 1936 | Box 7 \ 3 X 602 Axle Rear-page10 | |
| Design and construction of the proposed Wraith rear axle. | 11th Aug 1936 | Box 7 \ 3 X 602 Axle Rear-page11 | |
| Blueprint showing the suggested rear axle construction for the Wraith model. | 13th Aug 1936 | Box 7 \ 3 X 602 Axle Rear-page12 | |
| Request to manufacture a mild steel stiffening plate and fit it to a Scott tube for the Wraith rear axle for deflection testing. | 13th Aug 1936 | Box 7 \ 3 X 602 Axle Rear-page13 | |
| Drawing of a stiffening plate for fitting to an experimental banjo axle. | 28th Feb 1929 | Box 7 \ 3 X 602 Axle Rear-page14 | |
| Cost, design, and testing of the Wraith rear axle. | 14th Aug 1936 | Box 7 \ 3 X 602 Axle Rear-page15 | |
| Design considerations for an axle, comparing different types and their drawbacks. | 21th Aug 1936 | Box 7 \ 3 X 602 Axle Rear-page16 | |
| The procurement of a Wraith II back axle from Kirkstall Forge, comparing mild versus nickel steel. | 21th Aug 1936 | Box 7 \ 3 X 602 Axle Rear-page17 | |
| Modifications to the Wraith II back axle, including a new stiffening plate and shouldered studs. | 12th Sep 1936 | Box 7 \ 3 X 602 Axle Rear-page18 | |
| Recommendations for rear axle construction, including testing a Ford axle and considering a new half-floating scheme. | 24th Sep 1936 | Box 7 \ 3 X 602 Axle Rear-page19 | |
| Cost comparison of different rear axle construction designs. | 24th Sep 1936 | Box 7 \ 3 X 602 Axle Rear-page20 | |
| Reduction of costs by using half-floating or butt-welded axle shafts and addressing potential failures. | 24th Sep 1936 | Box 7 \ 3 X 602 Axle Rear-page21 | |
| Design, testing, and cost-effectiveness of a banjo tube rear axle for the Wraith model. | 24th Sep 1936 | Box 7 \ 3 X 602 Axle Rear-page22 | |
| Comparative analysis of axle designs, focusing on half-floating axles and referencing models from Ford, Rover, Aston Martin, Bentley, and Lagonda. | 24th Sep 1936 | Box 7 \ 3 X 602 Axle Rear-page23 | |
| Recommendations for a new axle design, detailing specifications and comparing half-floating and 3/4 floating options. | 24th Sep 1936 | Box 7 \ 3 X 602 Axle Rear-page24 | |
| The weight and cost implications of half floating axles versus fully floating axles, and pressed wheels versus spoked wheels. | 24th Sep 1936 | Box 7 \ 3 X 602 Axle Rear-page25 | |
| Letter to Britannia Ltd. requesting a quotation for the manufacture of a .45' carbon steel tube. | 3rd Sep 1936 | Box 7 \ 3 X 602 Axle Rear-page26 | |
| Inquiry to Messrs. Tubes Ltd. regarding the potential manufacture and cost of a .45' carbon steel tube. | 3rd Sep 1936 | Box 7 \ 3 X 602 Axle Rear-page27 | |
| Letter from The Britannia Tube Co. Limited declining to quote for the manufacture of Tapered Tube. | 7th Sep 1936 | Box 7 \ 3 X 602 Axle Rear-page28 | |
| Design and manufacturing specifications for the Wraith II back axle. | 6th Nov 1936 | Box 7 \ 3 X 602 Axle Rear-page29 | |
| Material for Wraith Rear Axle Half Shafts, recommending a higher quality material to prevent failures. | 1st Dec 1936 | Box 7 \ 3 X 602 Axle Rear-page30 | |
| Increase in diameter for the Wraith II back axle shafts, referencing the Phantom III design. | 16th Dec 1926 | Box 7 \ 3 X 602 Axle Rear-page31 | |
| Sending a print of a 1.312 diameter axle shaft for the Wraith II back axle. | 17th Dec 1936 | Box 7 \ 3 X 602 Axle Rear-page32 | |
| Specifications for the Wraith II back axle, referencing schematics 4954 and 5014. | 1st Feb 1937 | Box 7 \ 3 X 602 Axle Rear-page33 | |
| Modifications to the Wraith III rear axle, reverting to a previous design standard. | 3rd Mar 1937 | Box 7 \ 3 X 602 Axle Rear-page34 | |
| Secret memo detailing design alterations for the Wraith III back axle to save cost. | 17th Mar 1937 | Box 7 \ 3 X 602 Axle Rear-page35 | |
| Modifications for the Wraith III back axle, applying features from the Phantom III axle. | 22th Mar 1937 | Box 7 \ 3 X 602 Axle Rear-page36 | |
| The use of clearance holes for bolts on the Wraith III back axle. | 19th Mar 1937 | Box 7 \ 3 X 602 Axle Rear-page37 | |
| Hardening of external splines on the Wraith rear axle wheel driver. | 12th Apr 1937 | Box 7 \ 3 X 602 Axle Rear-page38 | |
| Modifications to the rear axle and hub components for the Wraith III model. | 15th Apr 1937 | Box 7 \ 3 X 602 Axle Rear-page39 | |
| Modifications to the Wraith III Back Axle. | 19th Apr 1937 | Box 7 \ 3 X 602 Axle Rear-page40 | |
| Modification to the Wraith III rear axle shafts. | 22th Apr 1937 | Box 7 \ 3 X 602 Axle Rear-page41 | |
| Suggesting revised drilling clearances for bolt holes on the Wraith III & Phantom III back axle. | 12th Jul 1937 | Box 7 \ 3 X 602 Axle Rear-page42 | |
| Alterations to hole sizes on the back axle for Wraith III and Phantom III models. | 13th Jul 1937 | Box 7 \ 3 X 602 Axle Rear-page43 | |
| Decision regarding the level plug, filler, and breather plugs for the Wraith Axle Centre. | 2nd Sep 1937 | Box 7 \ 3 X 602 Axle Rear-page44 | |
| Decision on modifications to the Wraith rear axle, replacing the dip stick with a level plug. | 13th Sep 1937 | Box 7 \ 3 X 602 Axle Rear-page45 | |
| Scheme for a new rear axle buffer for the Wraith III model, designed for the .830 Hypoid axle. | 28th Sep 1937 | Box 7 \ 3 X 602 Axle Rear-page46 | |
| Completely machined Yoke Piece for a Wraith III Front Axle, asking which car it is to be fitted to. | 7th Oct 1937 | Box 7 \ 3 X 602 Axle Rear-page47 | |
| Proposal for a simplified crown wheel mounting for the back axle of Bentley, Bentley 50 and Wraith cars. | 10th Dec 1937 | Box 7 \ 3 X 602 Axle Rear-page48 | |
| Deciding on a 1.750 inch diameter for the B.50 and Wraith model's half-floating rear axle shaft. | 29th Dec 1937 | Box 7 \ 3 X 602 Axle Rear-page49 | |
| Confirmation to fit a pair of Phantom III axle gears, which have been run for one hour on the dynamometer in car 30-FX. | 14th Feb 1938 | Box 7 \ 3 X 602 Axle Rear-page50 | |
| Suggestion to halt gear machining for the Wraith rear axle pending a decision on a higher ratio. | 14th Feb 1938 | Box 7 \ 3 X 602 Axle Rear-page51 | |
| Instruction to fit Phantom III type rear axle gears to a Wraith car. | 28th Mar 1938 | Box 7 \ 3 X 602 Axle Rear-page52 | |
| Verbal report on the 10,000-mile test results for carbon steel Wraith rear axle tubes. | 21th Apr 1938 | Box 7 \ 3 X 602 Axle Rear-page53 | |
| Suitability of carbon steel for Wraith rear axle tubes, questioning the reliance on a single 10,000-mile test. | 26th Apr 1938 | Box 7 \ 3 X 602 Axle Rear-page54 | |
| The testing and fitting of carbon steel rear axle tubes for the Wraith model. | 28th Apr 1938 | Box 7 \ 3 X 602 Axle Rear-page55 | |
| Procurement of .4 carbon steel and S/N axle tubes for the Wraith model. | 29th Apr 1938 | Box 7 \ 3 X 602 Axle Rear-page56 | |
| Change of material to 3.5% nickel steel for the rear axle tubes on the first 300 Wraith chassis. | 22th Jun 1938 | Box 7 \ 3 X 602 Axle Rear-page57 | |
| Index card detailing components for the 25/30 Wraith Chassis, including the Propeller Shaft and Rear Axle. | 30th Nov 1938 | Box 7 \ 3 X 602 Axle Rear-page58 | |
| File note regarding the 25/30 HP Chassis gearbox, with a cross-reference to another file. | 6th Dec 1938 | Box 7 \ 3 X 602 Axle Rear-page59 | |
| Cracked end plate and sheared bolts on a Wraith III Bumper Chassis rear axle following testing. | 14th Jan 1939 | Box 7 \ 3 X 602 Axle Rear-page60 | |
| Photograph showing a cracked end plate of a rear axle centre case for a Wraith III. | 14th Jan 1939 | Box 7 \ 3 X 602 Axle Rear-page61 | |
| Photographic plate showing sheared end plate bolts and associated nuts. | 14th Jan 1939 | Box 7 \ 3 X 602 Axle Rear-page62 | |
| Induction system and carburation options for the Wraith model, referencing the 20/25 arrangement. | 26th Sep 1934 | Box 7 \ 4 X 608 Carburetter-page01 | |
| Carburetter system design, comparing performance and proposing system rearrangements. | 26th Sep 1934 | Box 7 \ 4 X 608 Carburetter-page02 | |
| Graph comparing the performance of Bentley and 20/25 camshafts. | 3rd Jan 1935 | Box 7 \ 4 X 608 Carburetter-page03 | |
| Requesting the urgent production and fitting of a Wraith vertical piston double downdraught carburetter to a Buick engine for development. | 3rd Jan 1935 | Box 7 \ 4 X 608 Carburetter-page04 | |
| Modifications to the Wraith carburetter, specifically increasing the choke centres. | 12th Apr 1935 | Box 7 \ 4 X 608 Carburetter-page05 | |
| Requesting detail drawings and the production of two experimental brass induction pipes for the Wraith. | 7th Jun 1937 | Box 7 \ 4 X 608 Carburetter-page06 | |
| Suggested improvements for the Stromberg D.C.42 Carburettor on the Wraith model. | 9th Jul 1937 | Box 7 \ 4 X 608 Carburetter-page07 | |
| Suggested improvements for the Stromberg D.C.42 carburettor on the Wraith and 30 HP models. | 9th Jul 1937 | Box 7 \ 4 X 608 Carburetter-page08 | |
| Proposed modifications to the Wraith 'Stromberg' D.C.42 Carburetter for the 25/30 HP | 15th Jul 1937 | Box 7 \ 4 X 608 Carburetter-page09 | |
| Instruction sheet regarding the carburetter for the Wraith III Chassis, section 5080. | 30th Sep 1937 | Box 7 \ 4 X 608 Carburetter-page10 | |
| Urgent request for a new pipe design for the Wraith induction system based on experimental data. | 9th Dec 1937 | Box 7 \ 4 X 608 Carburetter-page11 | |
| Tests and proposed improvements for the Wraith induction pipe. | 9th Dec 1937 | Box 7 \ 4 X 608 Carburetter-page12 | |
| Stress on throttle return springs for the Phantom III and 30 HP models. | 23th Dec 1937 | Box 7 \ 4 X 608 Carburetter-page13 | |
| Proposed alterations to the Floatchamber Vent Assembly for the Wraith & 30 HP model. | 6th Jan 1938 | Box 7 \ 4 X 608 Carburetter-page14 | |
| Requesting the creation of detail drawings for an experimental induction pipe for the Wraith III. | 8th Jan 1937 | Box 7 \ 4 X 608 Carburetter-page15 | |
| Parts changes for the Wraith III chassis, specifically for the induction pipe and carburetter. | 21th Jan 1938 | Box 7 \ 4 X 608 Carburetter-page16 | |
| Detail drawings for an experimental induction pipe and carburetter for the Wraith III chassis. | 28th Jan 1938 | Box 7 \ 4 X 608 Carburetter-page17 | |
| Blueprints for Wraith III carburetter parts, the Throttle Spindle and Spring. | 29th Mar 1938 | Box 7 \ 4 X 608 Carburetter-page18 | |
| Request to rivet levers to six Stromberg choke spindles, remove burrs, and nickel plate them for the Wraith model. | 13th Apr 1938 | Box 7 \ 4 X 608 Carburetter-page19 | |
| Analysis of carburetter flooding issues on the Wraith model. | 20th Apr 1938 | Box 7 \ 4 X 608 Carburetter-page20 | |
| Alternative Choke Relief Valve springs for the Wraith III carburetter. | 26th Apr 1938 | Box 7 \ 4 X 608 Carburetter-page21 | |
| Required modification to the air bleed on Wraith carburettors. | 6th May 1938 | Box 7 \ 4 X 608 Carburetter-page22 | |
| Report on installing an insulation washer under the carburetter. | 6th May 1938 | Box 7 \ 4 X 608 Carburetter-page23 | |
| Tests concerning a Wraith carburetter insulation washer and engine mounting flooding issues. | 7th May 1938 | Box 7 \ 4 X 608 Carburetter-page24 | |
| Modification Rm.467, transferring the carburetter air bleed to the choke body. | 7th May 1938 | Box 7 \ 4 X 608 Carburetter-page25 | |
| Graph plotting the temperature of a Wraith carburettor over time with different types of washers. | 16th May 1938 | Box 7 \ 4 X 608 Carburetter-page26 | |
| Order for 6 insulation washers from the Cooper Joint Co. for testing on the Wraith. | 16th May 1938 | Box 7 \ 4 X 608 Carburetter-page27 | |
| Modifications to the carburetter air intake connection for the Wraith III. | 27th Sep 1938 | Box 7 \ 4 X 608 Carburetter-page28 | |
| Decision to accept a known disability with Wraith carburettors over a flooding issue. | 8th Jun 1938 | Box 7 \ 4 X 608 Carburetter-page29 | |
| Carburation flat spot issue on Wraith carburetters. | 9th Jun 1938 | Box 7 \ 4 X 608 Carburetter-page30 | |
| The testing of production and experimental carburettors for the Wraith model, detailing performance issues and proposed modifications. | 9th Jun 1938 | Box 7 \ 4 X 608 Carburetter-page31 | |
| Performance data table for four production carburetters at various RPMs. | 9th Jun 1938 | Box 7 \ 4 X 608 Carburetter-page32 | |
| Performance data sheet comparing different carburettor setups and jet configurations. | 5th Jul 1938 | Box 7 \ 4 X 608 Carburetter-page33 | |
| The modification of Wraith carburetters to correct the fuel level. | 5th Jul 1938 | Box 7 \ 4 X 608 Carburetter-page34 | |
| The replacement of a copper/asbestos washer with an insulation washer for the Wraith carburetter. | 5th Jul 1938 | Box 7 \ 4 X 608 Carburetter-page35 | |
| Suggestions to overcome the distortion of the floatchamber lid on a Wraith III carburetter when tightening the petrol drain pipe union. | 7th Jul 1938 | Box 7 \ 4 X 608 Carburetter-page36 | |
| Cost comparison between a standard carburetter with a separate sheet metal tray and a special carburetter with an integral cast tray. | 7th Jul 1938 | Box 7 \ 4 X 608 Carburetter-page37 | |
| Instruction to alter the carburetter filter gauze mesh on part E.60579 for the Wraith and Phantom III models. | 13th Jul 1938 | Box 7 \ 4 X 608 Carburetter-page38 | |
| The incorrect fitting of the clamp bolt on the Wraith air intake bend. | 14th Jul 1938 | Box 7 \ 4 X 608 Carburetter-page39 | |
| Distortion of the floatchamber lid on a Wraith III carburetter and proposing a solution. | 15th Jul 1938 | Box 7 \ 4 X 608 Carburetter-page40 | |
| Special features and decisions for the Stromberg carburetter on the Wraith III model. | 26th Oct 1938 | Box 7 \ 4 X 608 Carburetter-page41 | |
| Comparison of the Wraith III Stromberg carburetter against a standard version, detailing ten differences. | 26th Oct 1938 | Box 7 \ 4 X 608 Carburetter-page42 | |
| List of modifications and standard features for the Stromberg carburetter. | 26th Oct 1938 | Box 7 \ 4 X 608 Carburetter-page43 | |
| Design changes for future Wraith III carburetters based on an examination of a used unit. | 4th Nov 1938 | Box 7 \ 4 X 608 Carburetter-page44 | |
| Necessity of modifying the carburetter petrol drain pipes for the Wraith III, Series C production. | 5th Nov 1938 | Box 7 \ 4 X 608 Carburetter-page45 | |
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