| Description | Date | Identifier | |
| Testing a car fitted with a front axle torque tube to address high-speed wobbles. | 1st Sep 1925 | Box 67 \ 2 scan0170 | |
| Modifications to the Phantom front axle. | 26th Sep 1925 | Box 67 \ 2 scan0171 | |
| Proposal for lightening the Phantom front axle by milling it down to the original drawing dimensions. | 26th Sep 1925 | Box 67 \ 2 scan0172 | |
| Tests on a Silver Ghost regarding high-speed steering wobbles and self-centering characteristics. | 28th Sep 1925 | Box 67 \ 2 scan0173 | |
| List of modifications for the next Phantom model for France, detailing weight reduction and other improvements. | 29th Sep 1925 | Box 67 \ 2 scan0174 | |
| Manufacturing issues and potential solutions for oversized front axles on the New Phantom chassis. | 29th Sep 1925 | Box 67 \ 2 scan0175 | |
| Technical memorandum discussing the difficulties encountered when forging a front axle. | 29th Sep 1925 | Box 67 \ 2 scan0176 | |
| Machining a Phantom front axle to reduce its weight and the required testing. | 3rd Oct 1925 | Box 67 \ 2 scan0177 | |
| Improvements for the Phantom car, including a duralumin front brake carrier and weight reduction modifications to the pivot and hub. | 3rd Oct 1925 | Box 67 \ 2 scan0178 | |
| Arrangements for the New Phantom's 10,000-mile test in France. | 1st Oct 1925 | Box 67 \ 2 scan0179 | |
| Production difficulties with duralumin brake carrier plates for a Phantom car's 10,000-mile test. | 10th Oct 1925 | Box 67 \ 2 scan0180 | |
| New weight-saving design for the Phantom front axle and steering levers. | 3rd Oct 1925 | Box 67 \ 2 scan0181 | |
| Decision on the India Front Axle clutch arrangement and the preference for a plain bearing. | 22th Oct 1925 | Box 67 \ 2 scan0182 | |
| New Phantom front axle design to reduce steering wobbles. | 16th Nov 1925 | Box 67 \ 2 scan0183 | |
| Production output and potential material hold-ups for the New Phantom Front Axle. | 18th Nov 1925 | Box 67 \ 2 scan0184 | |
| New Phantom front axle design to address high-speed wobbles and the resulting impact on material stock. | 18th Nov 1925 | Box 67 \ 2 scan0185 | |
| Phantom axle ratios and their effect on car performance. | 23th Nov 1925 | Box 67 \ 2 scan0186 | |
| The effects of axle ratios on speed, fuel consumption, and engine overheating. | 12th Jun 1925 | Box 67 \ 2 scan0187 | |
| The progress of a differential modification on the 10,000 miles test car. | 26th Nov 1925 | Box 67 \ 2 scan0188 | |
| Query from DA to HS regarding the type of front axle fitted to the 10,000 miles car. | 26th Nov 1925 | Box 67 \ 2 scan0189 | |
| Production timeline for a new lighter front axle for the Phantom model to reduce H.S. wobbles. | 27th Nov 1925 | Box 67 \ 2 scan0190 | |
| Delays in design drawings, setting testing schedules for 'AA' and 'AB' series chassis, and planning for new axle production. | 27th Nov 1925 | Box 67 \ 2 scan0191 | |
| The axle on the 8-EX test car running in France. | 27th Nov 1925 | Box 67 \ 2 scan0192 | |
| Axle design and its effect on high-speed steering wobbles. | 11th Dec 1925 | Box 67 \ 2 scan0193 | |
| Urging the adoption of hydraulic shock dampers, semi-balloon tyres, and a lighter front axle for Phantom and Goshawk models. | 27th Feb 1926 | Box 67 \ 2 scan0194 | |
| Urgent priorities for the Phantom model weight reduction project. | 2nd Apr 1926 | Box 67 \ 2 scan0195 | |
| Modifications and alternative designs for the Phantom suspension system. | 17th Apr 1926 | Box 67 \ 2 scan0196 | |
| Continued memorandum regarding car suspension, specifically the oscillation of sprung mass and spring arrangements. | 14th Apr 1925 | Box 67 \ 2 scan0197 | |
| Defects of front axle control, including torsion, steering wobble, and lateral translation, with proposed design considerations. | 18th Apr 1926 | Box 67 \ 2 scan0198 | |
| Quality and finishing process for front axle forgings. | 29th Apr 1926 | Box 67 \ 2 scan0199 | |
| The ordering strategy for front axles for the 40/50HP model following a telephone conversation. | 8th May 1926 | Box 67 \ 2 scan0200 | |
| Modifications and test results for pistons, auto advance, steering, front axle, and magneto systems. | 14th May 1926 | Box 67 \ 2 scan0201 | |
| Chassis design, component choices, and cost considerations for future models. | 14th May 1926 | Box 67 \ 2 scan0202 | |
| Hopes for future manufacturing improvements and cost savings related to chassis types. | 17th May 1926 | Box 67 \ 2 scan0203 | |
| Required improvements to the Phantom's steering system and related components. | 17th May 1926 | Box 67 \ 2 scan0204 | |
| Telegram from Springfield inquiring about the testing of a new front axle and dispatch of Houdaille shock absorbers. | 17th May 1926 | Box 67 \ 2 scan0205 | |
| Production delays of a new front axle and shock absorbers due to a strike. | 20th May 1926 | Box 67 \ 2 scan0206 | |
| Proposal to add friction to the existing front axles of the Phantom model. | 28th May 1926 | Box 67 \ 2 scan0207 | |
| Night letter cablegram from Springfield, Massachusetts regarding a report on front axle shock absorbers. | 29th May 1926 | Box 67 \ 2 scan0208 | |
| Dissatisfaction with induced friction on front axle pivots and questioning its necessity to counter steering wobble. | 31th May 1926 | Box 67 \ 2 scan0209 | |
| Technical memorandum detailing issues and proposed improvements for a new front axle design. | 10th Jun 1926 | Box 67 \ 2 scan0210 | |
| Letter confirming a cablegram regarding satisfactory preliminary tests on a new front axle. | 14th Jun 1926 | Box 67 \ 2 scan0211 | |
| Internal instruction to send a cable to Mr. Olley in the U.S.A. regarding satisfactory new front axle tests. | 14th Jun 1926 | Box 67 \ 2 scan0212 | |
| Confirmation copy of a cablegram from the US office in Springfield to the UK office in Derby, inquiring about an axle shipment. | 15th Jun 1926 | Box 67 \ 2 scan0213 | |
| The bumping test results for a new lightened axle for the Phantom model. | 1st Jun 1926 | Box 67 \ 2 scan0214 | |
| The 50-hour bumping test of a lightened front axle for the Phantom model, confirming its road safety. | 18th Jun 1926 | Box 67 \ 2 scan0215 | |
| Modifications to the Phantom front axle for testing and general production. | 18th Jun 1926 | Box 67 \ 2 scan0216 | |
| Modifications and testing of a new front axle following criticism. | 21th Jun 1926 | Box 67 \ 2 scan0217 | |
| Telegram received by telephone requesting a shipping date for orders. | 23th Jun 1926 | Box 67 \ 2 scan0218 | |
| Ordering forgings for the New Phantom lightened type front axle. | 28th Jun 1926 | Box 67 \ 2 scan0219 | |
| Visit to Vickers regarding the urgent production of front axle forgings and the associated delays. | 28th Jun 1926 | Box 67 \ 2 scan0220 | |
| Decision to order 50 forgings for the new lightened type front axle for the Phantom model. | 29th Jun 1926 | Box 67 \ 2 scan0221 | |
| Requesting pre-war experimental reports on Phantom front axle failures during bumping rig tests. | 29th Jun 1926 | Box 67 \ 2 scan0222 | |
| Progress on the 12-EX car for France, covering experimental parts, testing schedules, and the production of a new lightened axle. | 30th Jun 1926 | Box 67 \ 2 scan0223 | |
| Development, testing, and production schedule for a new lightened front axle. | 1st Jul 1926 | Box 67 \ 2 scan0224 | |
| Modifications to the Phantom front axle for improved strength. | 1st Jul 1926 | Box 67 \ 2 scan0225 | |
| From BJ to BY agreeing to a previous communication regarding a lightened type front axle. | 1st Jul 1926 | Box 67 \ 2 scan0226 | |
| Failure and modification of a Phantom front axle after a bumping test. | 6th Jul 1926 | Box 67 \ 2 scan0227 | |
| Comparison of performance characteristics between 14-tooth and 15-tooth axles on the Phantom model. | 1st Jul 1926 | Box 67 \ 2 scan0228 | |
| Continued memo regarding quiet 14-tooth axles and a request for a reply. | 8th Aug 1926 | Box 67 \ 2 scan0229 | |
| Relaying Mr. Royce's interest in new front axle designs, referencing Lancia and Sizaire, and halting experimental work. | 8th Aug 1926 | Box 67 \ 2 scan0230 | |
| Cause of Phantom steering issues, attributing them to balloon tyres and proposing a hydraulic damper solution. | 18th Aug 1925 | Box 67 \ 2 scan0231 | |
| Scheme to apply friction to the Phantom steering axle to mitigate low-speed wobbles. | 21th Aug 1926 | Box 67 \ 2 scan0232 | |
| Modifications to the Phantom's front axle pivots to increase friction. | 27th Aug 1926 | Box 67 \ 2 scan0233 | |
| Letter from Chateauroux, France, detailing delays and plans for testing a new axle on car 8-EX. | 31th Aug 1926 | Box 67 \ 2 scan0234 | |
| Safety concerns of wheel wobble with larger tyres at high speeds. | 2nd Sep 1926 | Box 67 \ 2 scan0235 | |
| Advantages of fitting larger, low-pressure tyres and arranging tests. | 2nd Sep 1926 | Box 67 \ 2 scan0236 | |
| Effects of the front axle's 'out of centre point' on braking and steering. | 24th Sep 1926 | Box 67 \ 2 scan0237 | |
| Tests on front axles and the effect of braking on steering. | 1st Oct 1926 | Box 67 \ 2 scan0238 | |
| Analysis of vehicle handling, focusing on steering control issues during braking and cornering. | 1st Oct 1926 | Box 67 \ 2 scan0239 | |
| The steering effects and safety of different 'out of centrepoint' front brake configurations. | 1st Oct 1926 | Box 67 \ 2 scan0240 | |
| Front axle design, braking effects, and the advantages of helical springs over other types. | 2nd Oct 1926 | Box 67 \ 2 scan0241 | |
| Required spring load on a friction plate device on the pivot to resolve heavy steering issues. | 2nd Oct 1926 | Box 67 \ 2 scan0242 | |
| Suggesting changes to the front brake bedding process for the new Phantom axle. | 7th Oct 1926 | Box 67 \ 2 scan0243 | |
| Use of concentric brake bedding and liners for new front axles. | 1st Oct 1926 | Box 67 \ 2 scan0244 | |
| Potential purchase of a Sizaire car and improvements to front axle design to prevent 'speed wobble'. | 8th Oct 1926 | Box 67 \ 2 scan0245 | |
| Request to the Experimental Department to produce and test new brake drums for the 40/50 Phantom chassis. | 4th Nov 1926 | Box 67 \ 2 scan0246 | |
| Modification of brake drum thickness for the Phantom Chassis lightened front axle. | 4th Nov 1926 | Box 67 \ 2 scan0247 | |
| Steering performance related to different axle types, spring weights, and worm ratios. | 11th Nov 1926 | Box 67 \ 2 scan0248 | |
| Production of leather covers for cross steering and ball joints for the 40/50 Phantom chassis. | 19th Aug 1926 | Box 67 \ 2 scan0249 | |
| From D.A. to Hs/Rm discussing potential stiffness issues with spring-loaded ball joints on the steering system. | 2nd Nov 1926 | Box 67 \ 2 scan0250 | |
| Issues of friction in a new front axle and proposing experiments. | 5th Nov 1926 | Box 67 \ 2 scan0251 | |
| Modifications for front brakes on a new axle, including a squeak damper and changes to the steering lever. | 13th Nov 1926 | Box 67 \ 2 scan0252 | |
| Part replacements for the front axle and brakes of a 40/50 Chassis (Phantom). | 15th Nov 1926 | Box 67 \ 2 scan0253 | |
| Steering safety issues on the 40/50 HP model, specifically the phenomenon of 'taking charge' when braking. | 23th Nov 1926 | Box 67 \ 2 scan0254 | |
| Braking and steering issues, detailing problems with front-wheel locking and proposing solutions to improve vehicle control. | 23th Nov 1926 | Box 67 \ 2 scan0255 | |
| Proposal to reduce front braking on all cars due to changes in weight distribution from modifications. | 23th Nov 1926 | Box 67 \ 2 scan0256 | |
| Line diagram of a car chassis showing the layout of the braking system and control linkages. | 25th Nov 1926 | Box 67 \ 2 scan0257 | |
| Adjustments to front-wheel braking proportions and servo effectiveness. | 25th Nov 1926 | Box 67 \ 2 scan0258 | |
| Test report on steering 'taking charge' for car 8-EX under various conditions. | 25th Nov 1926 | Box 67 \ 2 scan0259 | |
| Steering performance, road shocks, and a malfunctioning servo mechanism during testing. | 4th Dec 1926 | Box 67 \ 2 scan0260 | |
| Proposed front axle control modifications for the Phantom model, using the spring and shock damper, and suggesting a test to verify the geometry. | 4th Dec 1926 | Box 67 \ 2 scan0261 | |
| Letter to Mr. Hives detailing two faults found on a new front axle: swerving to the left under braking and a vibration issue termed 'tramping'. | 8th Dec 1926 | Box 67 \ 2 scan0262 | |
| Letter detailing issues with axle frequency, shock absorbers, and squeaking front brakes, requesting suggestions for a damper scheme. | 8th Dec 1926 | Box 67 \ 2 scan0263 | |
| Modifications to the Phantom's engine torque damper and timing case. | 12th Sep 1926 | Box 67 \ 2 scan0264 | |
| Modifications to the Phantom front axle control to replace a spring control with a standard shock damper. | 14th Dec 1926 | Box 67 \ 2 scan0265 | |
| Performance enhancements for the Phantom car, including a 16-tooth axle and experimental engine modifications. | 13th Dec 1926 | Box 67 \ 2 scan0266 | |
| Steering and braking performance related to a new front axle. | 21th Dec 1926 | Box 67 \ 2 scan0267 | |
| Technical discussion on diagnosing and resolving wheel wobble, tramping, and shimmy issues. | 21th Dec 1926 | Box 67 \ 2 scan0268 | |
| Solutions for steering wobble, wheel alignment, and brake squeaks. | 21th Dec 1926 | Box 67 \ 2 scan0269 | |
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