| Description | Date | Identifier | |
| Urgent request to manufacture and destructively test six front brake operating links made from Nickel Steel. | 19th Aug 1937 | Box 92 \ 4 scan0351 | |
| Investigation into the failure of the 'dumb bell' link G.83302 for the Phantom III front brakes. | 23th Aug 1937 | Box 92 \ 4 scan0352 | |
| Investigation into a bell crank defect on Raphael's car, with recommendations for inspection and rectification on all cars. | 23th Aug 1937 | Box 92 \ 4 scan0353 | |
| Technical bulletin regarding failures and modifications to the Phantom III front brakes. | 25th Aug 1937 | Box 92 \ 4 scan0354 | |
| Parts list for fitting the latest type brake operating link and lever step to the Phantom III chassis. | 18th Aug 1937 | Box 92 \ 4 scan0355 | |
| Parts list for front brakes and front axle assemblies for 'A' and 'B' series vehicles. | 18th Aug 1937 | Box 92 \ 4 scan0356 | |
| Failure analysis report on the Phantom III's front brake dumb bell, detailing seven contributing design issues. | 25th Aug 1937 | Box 92 \ 4 scan0357 | |
| Cause of breakage in a dumb bell component due to continual bending. | 25th Aug 1937 | Box 92 \ 4 scan0358 | |
| Diagram illustrating the angle of a dumbbell component and its interaction with a spherical seating. | 21th Aug 1937 | Box 92 \ 4 scan0359 | |
| Blueprint diagram illustrating a fault with a front brake shoe mechanism. | 21th Aug 1937 | Box 92 \ 4 scan0360 | |
| Requesting the creation of two dumb bell links for a Phantom III brake rig test. | 30th Aug 1937 | Box 92 \ 4 scan0361 | |
| The order for front axle brake lever changeovers on Phantom III chassis based on series numbers. | 8th Sep 1937 | Box 92 \ 4 scan0362 | |
| Instruction to fit new brake parts to Phantom chassis 37-EX while it is in for clutch modifications. | 9th Sep 1937 | Box 92 \ 4 scan0363 | |
| Proposal for the Phantom 111 hand brake levers and shaft, suggesting a change in the attachment method. | 13th Sep 1937 | Box 92 \ 4 scan0364 | |
| The time and logistics for the changeover of the Phantom III brake mechanism. | 17th Sep 1937 | Box 92 \ 4 scan0365 | |
| The proposal for a common hand and foot brake system for the Phantom III rear brakes. | 18th Sep 1937 | Box 92 \ 4 scan0366 | |
| Proposal for the Phantom III rear brakes, suggesting a move from aluminium to cast iron drums. | 18th Sep 1937 | Box 92 \ 4 scan0367 | |
| Modifications to the Phantom III rear brakes to reduce complexity and cost. | 18th Sep 1937 | Box 92 \ 4 scan0368 | |
| Comparison blueprint of an existing versus a suggested modified foot brake shoe design. | 17th Sep 1937 | Box 92 \ 4 scan0369 | |
| The changeover of the Phantom III front brake mechanism. | 20th Sep 1937 | Box 92 \ 4 scan0370 | |
| Concerning brake modifications for Phantom III and Bentley models. | 30th Sep 1937 | Box 92 \ 4 scan0371 | |
| Blueprints and production details for Phantom III front and rear brakes. | 8th Oct 1937 | Box 92 \ 4 scan0372 | |
| Blueprints and parts for Phantom III front and rear brakes. | 4th Oct 1937 | Box 92 \ 4 scan0373 | |
| Fitting new brake levers and servicing the brakes on Phantom III cars 37-EX and 36-EX. | 12th Oct 1937 | Box 92 \ 4 scan0374 | |
| Outlining the supply of materials and costs for the modification of Phantom III front brakes. | 14th Oct 1937 | Box 92 \ 4 scan0375 | |
| Request for information on the brake pressure distribution for the Phantom III. | 28th Oct 1937 | Box 92 \ 4 scan0376 | |
| Comparison of braking proportions for the Phantom III against other models like Bentley and Wraith. | 30th Oct 1937 | Box 92 \ 4 scan0377 | |
| Page discussing the poor front braking performance of the Phantom III, leading to long stopping distances and tail wag. | 30th Oct 1937 | Box 92 \ 4 scan0378 | |
| Investigation into the failure of the dumb bell link on the Phantom III front brakes. | 4th Nov 1937 | Box 92 \ 4 scan0379 | |
| Photographic report comparing an intact ball end link with one that has failed during testing. | 4th Nov 1937 | Box 92 \ 4 scan0380 | |
| Photograph of a close-up view of a mechanical test rig or fixture. | 4th Nov 1937 | Box 92 \ 4 scan0381 | |
| Schematic diagrams of a fluid-actuated band brake system with multiple drums. | 19th Feb 1938 | Box 92 \ 4 scan0382 | |
| Requesting instructions for fitting and trying out newly completed Phantom III Hydraulic Brakes. | 19th Feb 1938 | Box 92 \ 4 scan0383 | |
| Request for drawings and one set of modified 14' diameter rear brakes for a 39-EX chassis. | 22th Feb 1938 | Box 92 \ 4 scan0384 | |
| The postponement of fitting hydraulic brakes to Phantom III models due to budget constraints. | 23th Feb 1938 | Box 92 \ 4 scan0385 | |
| Parts for an experimental modification to the Phantom III rear brakes and hubs. | 4th Mar 1938 | Box 92 \ 4 scan0386 | |
| Redesign of the Phantom III rear brakes. | 23th Mar 1938 | Box 92 \ 4 scan0387 | |
| Proposal to retain the 16' drums for the rear brakes of the Phantom III. | 29th Mar 1938 | Box 92 \ 4 scan0388 | |
| Notice regarding a Phantom III rear brake equalizer failure caused by incorrect jacking procedures. | 4th Apr 1938 | Box 92 \ 4 scan0389 | |
| Analysis report on the failure of a Phantom III rear brake equalizer pivot pin. | 4th Apr 1938 | Box 92 \ 4 scan0390 | |
| Blueprint illustrating various mechanical failures like indents, tears, and cracks on components under load. | 13th Apr 1938 | Box 92 \ 4 scan0391 | |
| Depot complaints regarding the Phantom III hand-brake and servo system. | 13th Apr 1938 | Box 92 \ 4 scan0392 | |
| Proposal to test plain screwed rods for the Phantom III brake linkage, similar to those used on the Wraith. | 21th Apr 1938 | Box 92 \ 4 scan0393 | |
| Brake complaints for the Phantom III, specifically servo squeaks and hand brake issues. | 29th Apr 1938 | Box 92 \ 4 scan0394 | |
| Page concluding a discussion about rear brakes. | 29th Apr 1938 | Box 92 \ 4 scan0395 | |
| Parts for Bentley II, Phantom III, and Wraith models. | 4th May 1938 | Box 92 \ 4 scan0396 | |
| Proposed alteration to the Phantom III brake levers to overcome a production difficulty. | 5th May 1938 | Box 92 \ 4 scan0397 | |
| Complaint about the hand brake lever ratchet on the Phantom III and testing a new Packard design. | 13th Jun 1938 | Box 92 \ 4 scan0398 | |
| Modification of rear brakes for the Phantom III chassis. | 15th Jun 1938 | Box 92 \ 4 scan0399 | |
| Outlining modifications to the Phantom III chassis rear brakes, including the equaliser and intermediate shaft. | 31th Aug 1938 | Box 92 \ 4 scan0400 | |
| Issues with the Phantom 111 front brake cable fraying and proposing alternative solutions. | 22th Sep 1938 | Box 92 \ 4 scan0401 | |
| Scheme for a double acting damper on the front brakes for the Phantom III, filed for reference due to objections to experimental work. | 4th Nov 1938 | Box 92 \ 4 scan0402 | |
| Alternative mild steel guide for the Phantom III brake rope to prevent fraying. | 12th Nov 1938 | Box 92 \ 4 scan0403 | |
| Blueprint for a Phantom III brake rope guide from the inter lever to the front brake equalizer. | 4th May 1938 | Box 92 \ 4 scan0404 | |
| Technical memorandum discussing various schematics for the Spectre Rear Axle, focusing on gear ratios and bearings. | 1st Mar 1934 | Box 92 \ 5 scan0001 | |
| The Spectre Rear Axle, detailing its specifications and similarity to the J.3. (or Vulture) model. | 18th Apr 1934 | Box 92 \ 5 scan0002 | |
| Alternative rear axle gear ratios for the Spectre model. | 5th Jul 1934 | Box 92 \ 5 scan0003 | |
| Test report on rear axle pinion thrust races and double purpose bearings, comparing different manufacturers, lubricants and cage materials. | 1st Jul 1934 | Box 92 \ 5 scan0004 | |
| The performance and failure analysis of various roller and ball bearings under testing. | 21th Jul 1934 | Box 92 \ 5 scan0005 | |
| Inaccessible placement of level plugs on the Spectre Rear Axle Centre Casing. | 13th Nov 1934 | Box 92 \ 5 scan0006 | |
| Modified boss and level plug for the Spectre rear axle casing. | 20th Nov 1934 | Box 92 \ 5 scan0007 | |
| Request to adapt an apparatus to measure the relative movement of each rear road wheel, concerning the Spectre Rear Axle Dither. | 22th Nov 1934 | Box 92 \ 5 scan0008 | |
| The application of 'Perfect' oil seals to the rear axle casing for the Spectre project. | 23th Nov 1934 | Box 92 \ 5 scan0009 | |
| Lightened section for the Spectre's rear brake drums. | 10th May 1935 | Box 92 \ 5 scan0010 | |
| Results of a 10,000 miles test on a Spectre III rear axle, including bearing replacement and lubrication improvements. | 28th May 1935 | Box 92 \ 5 scan0011 | |
| Modifications to the 'Spectre' rear axle differential to improve lubrication. | 29th May 1935 | Box 92 \ 5 scan0012 | |
| Higher gear ratio and roller race design for the Spectre rear axle. | 6th Jun 1935 | Box 92 \ 5 scan0013 | |
| The inspection and repair of the Spectre I rear axle due to excessive backlash. | 6th Jun 1935 | Box 92 \ 5 scan0014 | |
| Bevel pinion bearing for the Spectre Rear Axle, recommending a switch from a Hoffmann to an R. & M. bearing. | 12th Jun 1935 | Box 92 \ 5 scan0015 | |
| Instructing a drawing change for the Rear Axle Pinion Bearing for the Spectre model, removing lubrication slots. | 26th Jun 1935 | Box 92 \ 5 scan0016 | |
| Permanent design for a rear axle damper with autolock control for the Spectre model. | 26th Jun 1935 | Box 92 \ 5 scan0017 | |
| Modifications to a gland, rocking shaft bush, and damper filling plug. | 26th Jun 1935 | Box 92 \ 5 scan0018 | |
| Modification to the Rear Axle Damper, specifically regarding the guide for the sleeve actuated by the autolock lever. | 2nd Jul 1935 | Box 92 \ 5 scan0019 | |
| Modification to the Rear Axle Damper, referencing drawing N. Sch. 4559. | 2nd Jul 1935 | Box 92 \ 5 scan0020 | |
| Oil leak from the pinion bearing on a Spectre Rear Axle, recommending a modification. | 7th Aug 1935 | Box 92 \ 5 scan0021 | |
| The replacement of a pinion oil seal for a Spectre rear axle. | 20th Aug 1935 | Box 92 \ 5 scan0022 | |
| Oil seal issue for the Spectre Rear Axle, proposing a solution based on experience with the Bentley. | 20th Aug 1935 | Box 92 \ 5 scan0023 | |
| Requesting an official order for half a dozen oil seals from the Super Oil Seal Manufacturing Co. | 20th Aug 1935 | Box 92 \ 5 scan0024 | |
| Required modification to the Spectre Rear Axle casting to add an oil return way. | 5th Sep 1935 | Box 92 \ 5 scan0025 | |
| Requesting an old axle from chassis 2-S-I be fitted to the Vulture car for dynamometer work. | 27th Sep 1935 | Box 92 \ 5 scan0026 | |
| The shearing of keys on the Spectre rear axle pinion during sharp acceleration tests. | 1st Oct 1935 | Box 92 \ 5 scan0027 | |
| The rear axle fouling steel straps and the chassis bijur pipe on the Phantom III 31-EX model during a fast getaway. | 2nd Oct 1935 | Box 92 \ 5 scan0028 | |
| Temporary scheme for strengthening the Spectre rear axle pinion. | 2nd Oct 1935 | Box 92 \ 5 scan0029 | |
| On a Phantom III rear axle coupling failure, proposed modifications, and comparison with Bentley designs. | 2nd Oct 1935 | Box 92 \ 5 scan0030 | |
| Follow-up memo regarding proposed action on the Phantom III Rear Axle. | 2nd Oct 1935 | Box 92 \ 5 scan0031 | |
| The lubricating pipe arrangement and rebound sling modification for the Phantom III rear axle. | 3rd Oct 1935 | Box 92 \ 5 scan0032 | |
| Final scheme for strengthening the Phantom III Hypoid Pinion drive. | 5th Oct 1935 | Box 92 \ 5 scan0033 | |
| Query regarding a deviation from the standard taper on the Phantom III Rear Axle. | 7th Oct 1935 | Box 92 \ 5 scan0034 | |
| Dynamometer test on a Spectre rear axle, comparing performance figures with Bentley and Phantom II models. | 31th Oct 1935 | Box 92 \ 5 scan0035 | |
| Dynamometer testing of engine performance, axle bearings, and gearbox components. | 31th Oct 1935 | Box 92 \ 5 scan0036 | |
| Dynamometer testing of gears and an inspection of the propeller shaft after a road test. | 31th Oct 1935 | Box 92 \ 5 scan0037 | |
| Requesting the assembly of a new Ph.III rear axle with specific test requirements. | 8th Jan 1936 | Box 92 \ 5 scan0038 | |
| Excessive deflection in the Spectre Back Axle pinion mounting. | 28th Jan 1936 | Box 92 \ 5 scan0039 | |
| Adjustment of the rear axle oil level for the Phantom III model. | 29th Jan 1936 | Box 92 \ 5 scan0040 | |
| The procedure for achieving the correct oil level in a Phantom III rear axle. | 3rd Feb 1936 | Box 92 \ 5 scan0041 | |
| Modification required to increase the rear axle oil level for the Phantom III. | 6th Feb 1936 | Box 92 \ 5 scan0042 | |
| Request for a report on the distortion of a damaged Phantom III back axle centre casing. | 12th Feb 1936 | Box 92 \ 5 scan0043 | |
| Modifications to strengthen the back axle centre casing for use with a garage jack. | 28th Feb 1936 | Box 92 \ 5 scan0044 | |
| Note regarding design precautions for the centre casing and a material change for its cover. | 10th Feb 1936 | Box 92 \ 5 scan0045 | |
| Modifications to the back axle plugs for the Phantom III to avoid using a special spanner. | 10th Feb 1936 | Box 92 \ 5 scan0046 | |
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