| Description | Date | Identifier | |
| Letter from Hoffmann Manufacturing Co. Ltd. confirming that test results match their calculated values. | 2nd Jun 1939 | Box 114 \ 1 scan0209 | |
| Graph plotting end movement against varying thrust and journal loads for maximum and minimum curvature. | 2nd Jun 1933 | Box 114 \ 1 scan0210 | |
| Letter from British Timken Limited regarding the examination of bearing No. 35175-35326 and a request for a mounting print. | 6th Jun 1939 | Box 114 \ 1 scan0211 | |
| Letter to The Hoffmann Mfg. Co. Ltd. regarding the return of six L.1945 bearings for modifications to the cages. | 7th Jun 1939 | Box 114 \ 1 scan0212 | |
| Arranging the return of six Hoffmann bearings to be fitted with steel cages. | 7th Jun 1939 | Box 114 \ 1 scan0213 | |
| Notification regarding the return of six L.1945 bearings to Smith, Hoffmann, Chelmsford to have steel end plates fitted to cages. | 7th Jun 1939 | Box 114 \ 1 scan0214 | |
| Letter from British Timken Limited regarding the dispatch of mirror-finished outer race bearings. | 7th Jun 1939 | Box 114 \ 1 scan0215 | |
| Requesting two pieces of a ball race be sent to British Timken Ltd. | 8th Jun 1939 | Box 114 \ 1 scan0216 | |
| Letter to British Timken Limited regarding a failed case-hardened steel bearing. | 8th Jun 1939 | Box 114 \ 1 scan0217 | |
| Letter from a supplier regarding parts, materials, and a price increase for steel components. | 8th Jun 1939 | Box 114 \ 1 scan0218 | |
| Letter to a supplier regarding the material specifications and price for a bearing cage. | 9th Jun 1939 | Box 114 \ 1 scan0219 | |
| Letter from The Hoffmann Manufacturing Co. Ltd. regarding the dispatch of 6 special parts No. L.1945. | 10th Jun 1939 | Box 114 \ 1 scan0220 | |
| Letter from British Timken Limited regarding a returned piece of outer race for metallurgical investigation. | 10th Jun 1939 | Box 114 \ 1 scan0221 | |
| Wire communication inquiring about the despatch status of six special bearings that have not yet arrived. | 1st Jun 1939 | Box 114 \ 1 scan0222 | |
| Request to issue an official order for two bearings with a special mirror finish from Timken Ltd. | 15th Jun 1939 | Box 114 \ 1 scan0223 | |
| Test procedure for determining the life of varying axle shaft sizes and wheel bearings. | 3rd Jul 1939 | Box 114 \ 1 scan0224 | |
| Test report on four 45mm shafts run at 2 tons for 250,000 revolutions. | 3rd Jul 1939 | Box 114 \ 1 scan0225 | |
| Failure of a Timken bearing in a semi-floating rear axle and subsequent testing. | 13th Jul 1939 | Box 114 \ 1 scan0226 | |
| Technical memo discussing experiments and suggestions for rear axle crown wheel mounting. | 17th Jul 1939 | Box 114 \ 1 scan0227 | |
| Quotation letter from The Hoffmann Manufacturing Co. Ltd. for special bearings. | 19th Jul 1939 | Box 114 \ 1 scan0228 | |
| Page 2 of a letter from Hoffmann Manufacturing Co. Ltd. regarding a 10% quantity variance condition for specially made bearings. | 19th Jul 1939 | Box 114 \ 1 scan0229 | |
| Blueprint for a special greased seal bearing. | 1st Sep 1937 | Box 114 \ 1 scan0230 | |
| Letter to Hoffmann Manufacturing Co. Ltd. discussing criticisms of their equivalent wheel bearing compared to a New Departure bearing. | 20th Jul 1939 | Box 114 \ 1 scan0231 | |
| Design and potential cost reduction of a new rear axle, with a cost comparison requested against the Corniche axle. | 21th Jul 1939 | Box 114 \ 1 scan0232 | |
| Letter to The Gleason Works in Rochester, USA, regarding alternative gear ratios for a hypoid ring gear and pinion. | 22th Jul 1939 | Box 114 \ 1 scan0233 | |
| Providing three blueprints for a semi-floating rear axle on a Bentley V and 50 chassis to obtain comparative costs. | 22th Jul 1939 | Box 114 \ 1 scan0234 | |
| Blueprint for the rear propeller shaft on a Bentley V and 50 chassis. | 22th Jul 1939 | Box 114 \ 1 scan0235 | |
| Status report on the position of various rear axle shafts required for testing. | 26th Jul 1939 | Box 114 \ 1 scan0236 | |
| Request for endurance testing on a Bentley pinion bearing with different lubricants. | 28th Jul 1939 | Box 114 \ 1 scan0237 | |
| Letter from The Hoffmann Manufacturing Co. Ltd. discussing a replacement bearing and enclosing a corresponding drawing. | 8th Aug 1939 | Box 114 \ 1 scan0238 | |
| Design drawing for a special ball bearing. | 4th Aug 1909 | Box 114 \ 1 scan0239 | |
| Ordering of side shaft bearings, pending an examination of cars in France. | 9th Aug 1939 | Box 114 \ 1 scan0240 | |
| Estimated weight difference comparison between the 1.85 litre and 2.84 litre rear axles. | 10th Aug 1939 | Box 114 \ 1 scan0241 | |
| Requesting a pair of dynamometer axle gears for testing under 8 cylinder torque. | 11th Aug 1939 | Box 114 \ 1 scan0242 | |
| Letter from Gleason Works regarding gear manufacturing specifications, pricing, and delivery for an order. | 12th Aug 1939 | Box 114 \ 1 scan0243 | |
| Letter to Vandervell Products Ltd. enquiring about the manufacture and material specifications of spherical thrust washers. | 21th Aug 1939 | Box 114 \ 1 scan0244 | |
| Drawing with dimensions for a spherical thrust washer. | 21th Aug 1939 | Box 114 \ 1 scan0245 | |
| Letter from The Hoffmann Manufacturing Co. Ltd. regarding the supply of bearings for trial purposes. | 21th Aug 1939 | Box 114 \ 1 scan0246 | |
| Letter to Gleason Works in the USA regarding gear ratio drawings and part numbers. | 22th Aug 1939 | Box 114 \ 1 scan0247 | |
| Letter from Gleason Works regarding changes to part numbers and shipping schedule for ratio gears. | 12th Sep 1939 | Box 114 \ 1 scan0248 | |
| Letter from Gleason Works confirming a part number change for 13/43 ratio gears and the shipping schedule. | 12th Sep 1939 | Box 114 \ 1 scan0249 | |
| Letter from The Hoffmann Manufacturing Co. Ltd. regarding the despatch of two bearings for testing in rear hubs. | 29th Sep 1939 | Box 114 \ 1 scan0250 | |
| Letter to The Hoffmann Manufacturing Co. Ltd. postponing the testing of bearings due to the war. | 3rd Oct 1939 | Box 114 \ 1 scan0251 | |
| Secret memo discussing the design, loads, and stresses for a rear axle project named 'Rippletto'. | 1st Nov 1939 | Box 114 \ 1 scan0252 | |
| Calculations for torque and stress on the Rippletto Axle. | 1st Nov 1939 | Box 114 \ 1 scan0253 | |
| Letter to Messrs. Hardy Spicer & Co. Ltd. regarding a layout and quotation for 'Rippletto' and 'Myth' type axles. | 1st Nov 1939 | Box 114 \ 1 scan0254 | |
| The application of a Salisbury rear axle to the Myth chassis. | 1st Nov 1939 | Box 114 \ 1 scan0255 | |
| Letter from Hardy Spicer & Co. discussing design and stress remarks on parts for 'Rippletto' and 'Myth' models. | 7th Nov 1939 | Box 114 \ 1 scan0256 | |
| Letter regarding the high price of sourcing samples and arranging a quote with a third party named Spicer. | 7th Nov 1939 | Box 114 \ 1 scan0257 | |
| Axle modifications and component information for the Ripplet and Rippletto projects. | 13th Nov 1939 | Box 114 \ 1 scan0258 | |
| Letter to Hardy Spicer & Co. Ltd. concerning the Rippletto half shaft and potential alternative axles. | 16th Nov 1939 | Box 114 \ 1 scan0259 | |
| Comparison of axle stress between existing R.R. practice and Rippletto Salisbury, with a recommendation to increase the Rippletto diameter. | 16th Nov 1939 | Box 114 \ 1 scan0260 | |
| Letter discussing costings and modifications for the Rippletto axle and 'Myth' axle tube. | 16th Nov 1939 | Box 114 \ 1 scan0261 | |
| List of weights for various components and assemblies of a Studebaker rear axle. | 16th Nov 1939 | Box 114 \ 1 scan0262 | |
| Letter from Hardy Spicer & Co. regarding axle shaft splines, and prints for a Model 23 centre and fittings. | 23th Nov 1939 | Box 114 \ 1 scan0263 | |
| Letter to Hardy Spicer & Co. Ltd. regarding a propeller shaft drawing, Myth axle details, and rod coining equipment. | 25th Nov 1939 | Box 114 \ 1 scan0264 | |
| Scribbling action of rear axles, referencing a record from Vauxhall Motors. | 1st Dec 1939 | Box 114 \ 1 scan0265 | |
| Letter to Salisbury Transmission Company regarding an order for a Rippletto axle and specific gear ratios. | 1st Dec 1939 | Box 114 \ 1 scan0266 | |
| Confirming the receipt of an import license for Gleason Gears. | 20th Dec 1939 | Box 114 \ 1 scan0267 | |
| Return of blueprints, an import licence, and an order for gears from Gleason Works. | 20th Dec 1939 | Box 114 \ 1 scan0268 | |
| Requesting an order for three pairs of axle gears from Gleasons in America. | 19th Dec 1939 | Box 114 \ 1 scan0269 | |
| Future availability of Hypoid Oils and recommending the use of an alternative lubricant from Shell. | 17th Jan 1940 | Box 114 \ 1 scan0270 | |
| Letter confirming an import license has been obtained for Gleason Gears and that loaned blueprints are being returned. | 17th Jan 1940 | Box 114 \ 1 scan0271 | |
| Official order be sent for seeds to Blackmore & Langdon, Bath. | 18th Jan 1940 | Box 114 \ 1 scan0272 | |
| Potential improvements for new semi-floating axles. | 27th Jan 1940 | Box 114 \ 1 scan0273 | |
| Production of lighter gauge tubes and new axles for small cars. | 27th Jan 1940 | Box 114 \ 1 scan0274 | |
| Sending marked-up blueprints for axle gears ordered from America for customs purposes. | 1st Feb 1940 | Box 114 \ 1 scan0275 | |
| Instructions for three new rear axles for use on an Experimental Chassis. | 2nd Feb 1940 | Box 114 \ 1 scan0276 | |
| List of specifications and modifications for various parts identified by reference codes. | 12th Feb 1940 | Box 114 \ 1 scan0277 | |
| Letter to Messrs. Hardy, Spicer & Co. Ltd. regarding a quotation and material costs for a Salisbury axle. | 12th Feb 1940 | Box 114 \ 1 scan0278 | |
| Specifications for five new rear axles for the Senior Range cars. | 23th Feb 1940 | Box 114 \ 1 scan0279 | |
| Specifications and required modifications for a semi-floating axle and Hypoid axle for car 9.B.V. | 23th Feb 1940 | Box 114 \ 1 scan0280 | |
| Bearing arrangements and casing modifications for the Senior Range rear axle differential. | 23th Feb 1940 | Box 114 \ 1 scan0281 | |
| Design for welded-on spring seats for a semi-floating axle. | 23th Feb 1940 | Box 114 \ 1 scan0282 | |
| Letter from Hardy Spicer & Co. regarding a quote for axles and the status of connecting rods. | 26th Feb 1940 | Box 114 \ 1 scan0283 | |
| Letter to Hardy, Spicer & Co. Ltd. urging progress on a connecting rod job and awaiting an axle quotation. | 28th Feb 1940 | Box 114 \ 1 scan0284 | |
| Letter of enquiry to High Duty Alloys Ltd. regarding the production and pricing of a dural rear axle tube. | 29th Feb 1940 | Box 114 \ 1 scan0285 | |
| Quotation from Salisbury Axle Company Ltd. for 500 rear axles. | 1st Mar 1940 | Box 114 \ 1 scan0286 | |
| Quotation from Salisbury Transmission Company Limited for 500 rear axles for the Rippleto car. | 2nd Mar 1940 | Box 114 \ 1 scan0287 | |
| Letter to Hardy, Spicer & Co. Ltd. discussing a quotation for a 'Rippletto axle' and the possibility of local production. | 5th Mar 1940 | Box 114 \ 1 scan0288 | |
| Schemes for fitting self-sealing bearings to the half shafts of a semi-floating rear axle. | 6th Mar 1940 | Box 114 \ 1 scan0289 | |
| Letter from Hardy Spicer discussing tentative pricing for an axle and progress on an experimental connecting rod order. | 7th Mar 1940 | Box 114 \ 1 scan0290 | |
| Letter from Hardy, Spicer & Co., Limited to W.A. Robotham, Esq. regarding the supply of improved rods. | 7th Mar 1940 | Box 114 \ 1 scan0291 | |
| Letter from High Duty Alloys Ltd. regarding a drawing for a proposed axle tube. | 8th Mar 1940 | Box 114 \ 1 scan0292 | |
| Letter to a supplier discussing the pricing for an axle and the supply of connecting rods. | 11th Mar 1940 | Box 114 \ 1 scan0293 | |
| Revised design for a self-sealing bearing on a rear axle due to a discovered foul. | 12th Mar 1940 | Box 114 \ 1 scan0294 | |
| Blueprint showing revised housings for new departure self-seal bearings on rear wheels. | 12th Mar 1940 | Box 114 \ 1 scan0295 | |
| Providing instructions for the fitment of rear axle and spring components to a Ripple chassis. | 18th Mar 1940 | Box 114 \ 1 scan0296 | |
| Revised print for the Rear Axle (Senior) with a Self Sealing Bearing. | 19th Mar 1940 | Box 114 \ 1 scan0297 | |
| Specification for brake drums on new axles, addressing casting distortion issues and required modifications. | 19th Mar 1940 | Box 114 \ 1 scan0298 | |
| Letter from Gleason Works enclosing a hypoid gear summary and change sheet. | 20th Mar 1940 | Box 114 \ 1 scan0299 | |
| Summary of settings and changes for a 15-inch hypoid gear generator. | 15th Mar 1940 | Box 114 \ 1 scan0300 | |
| Specification and setting data for a Hypoid Gear set. | 19th Dec 1939 | Box 114 \ 1 scan0301 | |
| Specification sheet for a 15' Hypoid Generator and Hypoid Gears. | 15th Mar 1940 | Box 114 \ 1 scan0302 | |
| Summary of specifications and settings for Hypoid Gears, reference no. 1051. | 19th Dec 1939 | Box 114 \ 1 scan0303 | |
| Letter from Gleason Works regarding a hypoid gear summary and the shipment of gears. | 20th Mar 1940 | Box 114 \ 1 scan0304 | |
| The issue of advance blueprints for the Ripplet Senior Range, covering pedals, frame fittings, and switches. | 29th Mar 1940 | Box 114 \ 1 scan0305 | |
| Replacement of existing hypoid axles and the creation of a master List of Parts for rationalised chassis. | 30th Mar 1940 | Box 114 \ 1 scan0306 | |
| Letter from High Duty Alloys Ltd. regarding the costs and materials for a dural rear axle tube. | 4th Apr 1940 | Box 114 \ 1 scan0307 | |
| Requesting the stripping of a Salisbury axle to enable a weight analysis to be taken. | 7th Apr 1940 | Box 114 \ 1 scan0308 | |
| | | | |
