| Description | Date | Identifier | |
| Analysis of design features affecting weight and cost. | 14th Mar 1940 | Box 154a \ 2 scan0256 | |
| Illustration of an Opel front suspension system. | 14th Mar 1940 | Box 154a \ 2 scan0257 | |
| French document showing a cutaway of a complete Opel unibody chassis. | 15th Mar 1940 | Box 154a \ 2 scan0258 | |
| Requesting that interleaving material details be included in the car's specification to assist with investigating spring squeaks and ride quality. | 15th Mar 1940 | Box 154a \ 2 scan0259 | |
| Visit to Ferodo's to discuss the properties and testing of various interleaving materials. | 11th Mar 1940 | Box 154a \ 2 scan0260 | |
| Comparing different interleaving materials based on thickness, durability, friction, and cost. | 15th Mar 1940 | Box 154a \ 2 scan0261 | |
| Providing instructions and specifications for the Ripplet Chassis, focusing on rear springs and rear axle fitment. | 18th Mar 1940 | Box 154a \ 2 scan0262 | |
| Letter from Ferodo Ltd regarding a discussion on types and testing of spring interleaving materials. | 18th Mar 1940 | Box 154a \ 2 scan0263 | |
| Letter from Toledo Woodhead Springs Ltd. regarding a test report on 'Spaulding' Interleaves and samples from Bakelite Ltd. | 28th Mar 1940 | Box 154a \ 2 scan0264 | |
| Test report from Toledo Woodhead Springs Ltd. concerning creaks from springs fitted with 'Spauldite' interleaves. | 28th Mar 1940 | Box 154a \ 2 scan0265 | |
| Letter from Ferodo Ltd discussing the supply and testing of spring interleaving and bakelised board materials. | 28th Mar 1940 | Box 154a \ 2 scan0266 | |
| Request to issue an official order to Ferodo for 20 sheets of interleaving. | 30th Mar 1940 | Box 154a \ 2 scan0267 | |
| Fracture on a front suspension lever and the required testing procedures for other similar parts. | 5th Apr 1940 | Box 154a \ 2 scan0268 | |
| Request to send an official order to Ferodos for leaves of plain board interleaving and S9992. | 5th Apr 1940 | Box 154a \ 2 scan0269 | |
| Letter to Messrs. Ferodo Ltd. regarding material samples S.9992 and arrangements for a modified test rig. | 6th Apr 1940 | Box 154a \ 2 scan0270 | |
| Letter to Toledo Woodhead Springs regarding complaints and performance issues with spring interleaving. | 6th Apr 1940 | Box 154a \ 2 scan0271 | |
| Letter discussing further tests on interleaving and a request to see a rig set up for a creak test. | 6th Apr 1940 | Box 154a \ 2 scan0272 | |
| Parts lists and instructions for the Ripplet Chassis (50' Springs). | 9th Apr 1940 | Box 154a \ 2 scan0273 | |
| Letter from Ferodo Ltd concerning a supply issue with plain board for spring interleaving and a new test set order. | 10th Apr 1940 | Box 154a \ 2 scan0274 | |
| Letter from Toledo Woodhead Springs Ltd. regarding an appointment for a road spring creak test. | 12th Apr 1940 | Box 154a \ 2 scan0275 | |
| Dispatch of blueprints for the Ripplet & Rippletto front spring suspension mechanism. | 16th Apr 1940 | Box 154a \ 2 scan0276 | |
| Front suspension rating calculations, leverage ratios, and spring ratings. | 16th Apr 1940 | Box 154a \ 2 scan0277 | |
| Investigating the differences in front suspension spring rates for B.V. and B.50 cars. | 30th Mar 1939 | Box 154a \ 2 scan0278 | |
| Analysis of suspension linkage forces, coil spring rating, and the bending effect of the spring. | 30th Mar 1939 | Box 154a \ 2 scan0279 | |
| Formulas for calculating coil spring and wheel ratings, and discussing the effect of rubber bushes. | 30th Mar 1939 | Box 154a \ 2 scan0280 | |
| Graph comparing measured and calculated spring rates for the BI and B50 front suspension systems. | 24th Mar 1939 | Box 154a \ 2 scan0281 | |
| Letter to Ferodo Ltd. about test sets of bakelised board and delays with a sliding rig for friction testing. | 17th Apr 1940 | Box 154a \ 2 scan0282 | |
| The need to create a detailed drawing for a 56-inch Woodhead Interleaved Type Spring. | 19th Apr 1940 | Box 154a \ 2 scan0283 | |
| Parts and fitment instructions for rear shock dampers and related components. | 19th Apr 1940 | Box 154a \ 2 scan0284 | |
| Letter from Toledo Woodhead Springs Ltd. regarding the arrangement of an appointment. | 19th Apr 1940 | Box 154a \ 2 scan0285 | |
| Letter to Toledo Woodhead Springs, Ltd. regarding the arrangement of a meeting. | 23th Apr 1940 | Box 154a \ 2 scan0286 | |
| Urgency of detailing P.L.167 for the Rippletto project. | 26th Apr 1940 | Box 154a \ 2 scan0287 | |
| Letter from Ferodo Ltd to Mr. Clapham inviting him to view a modified sliding test rig. | 4th May 1940 | Box 154a \ 2 scan0288 | |
| Provision of blueprints for lightened front suspension lower triangle levers for the Ripplet Chassis. | 8th May 1940 | Box 154a \ 2 scan0289 | |
| Cover sheet for a development work report on frames, shock dampers, suspension, and weighbridge tests at the Clan Foundry. | 1st May 1940 | Box 154a \ 2 scan0290 | |
| Chassis frame design, modifications, and torsional stiffness analysis. | 1st May 1940 | Box 154a \ 2 scan0291 | |
| Technical report on the issues and development of front shock dampers. | 1st May 1940 | Box 154a \ 2 scan0292 | |
| The testing and comparison of different car dampers, including Buick and Gordon Armstrong types. | 1st May 1940 | Box 154a \ 2 scan0293 | |
| The development and testing of a new wishbone front suspension, detailing noise reduction efforts and material trials. | 1st May 1940 | Box 154a \ 2 scan0294 | |
| Issues with coil springs and the subsequent decision to modify the bump buffers. | 1st May 1940 | Box 154a \ 2 scan0295 | |
| Technical report on rear suspension, comparing interleaving materials, spring specifications, and rebound strap designs. | 1st May 1940 | Box 154a \ 2 scan0296 | |
| Procedures for conducting weighbridge tests, including torsion and suspension tests, on car frames. | 8th May 1940 | Box 154a \ 2 scan0297 | |
| Letter to Ferodo Ltd. regarding a visit to inspect the modified sliding test rig. | 8th May 1940 | Box 154a \ 2 scan0298 | |
| Letter from Ferodo Ltd. regarding a meeting and the test performance of Spauldiite material. | 10th May 1940 | Box 154a \ 2 scan0299 | |
| Inquiry about purchasing an Opel Kapitan with a specific rubber-insulated front suspension. | 30th May 1940 | Box 154a \ 2 scan0300 | |
| Front suspension, a spring testing machine, and linkages. | 4th Jun 1940 | Box 154a \ 2 scan0301 | |
| Letter discussing calculation methods for wishbone linkage effects, comparing force polygons with graphical methods. | 17th May 1940 | Box 154a \ 2 scan0302 | |
| Technical memo discussing methods for measuring spring rates and the effects of various components on wheel rate. | 17th May 1940 | Box 154a \ 2 scan0303 | |
| Calculations and diagrams for the angular rate of various mechanical systems. | 16th May 1940 | Box 154a \ 2 scan0304 | |
| Forwarding a report on suspension and frame work, highlighting design considerations for lattice bracing and shock absorbers. | 10th Jun 1940 | Box 154a \ 2 scan0305 | |
| List of suppliers for lower front suspension levers with an assessment of their reliability. | 6th Jul 1940 | Box 154a \ 2 scan0306 | |
| Inquiry to Messrs. Ferodo, Ltd. regarding test results on spring interleaving and other materials. | 6th Jul 1940 | Box 154a \ 2 scan0307 | |
| Letter from Ferodo Ltd regarding tests on spring interleaving materials and their friction values. | 9th Jul 1940 | Box 154a \ 2 scan0308 | |
| Letter to Ferodo Ltd. regarding 'inter-leaving' and arranging a meeting to discuss results. | 10th Jul 1940 | Box 154a \ 2 scan0309 | |
| Letter from Ferodo Ltd regarding the timing of a visit to discuss test data. | 13th Jul 1940 | Box 154a \ 2 scan0310 | |
| Summary of total mileage for Rationalized cars with independent front suspension, B.V. cars, and various B-series engines. | 17th Jul 1940 | Box 154a \ 2 scan0311 | |
| List of reference numbers with associated mileage and engine type notes. | 17th Jul 1940 | Box 154a \ 2 scan0312 | |
| Mileage summary for Rationalized cars, B.V. cars, and various B-series engines. | 17th Jul 1940 | Box 154a \ 2 scan0313 | |
| Typed list of references, serial numbers and engine specifications, with some dated entries. | 18th Jul 1940 | Box 154a \ 2 scan0314 | |
| Project memo discussing the design of a front suspension for the Junior Range vehicle. | 18th Jul 1940 | Box 154a \ 2 scan0315 | |
| Continuation memo detailing design considerations for front suspension, brakes, and anti-roll rod positioning. | 8th Nov 1937 | Box 154a \ 2 scan0316 | |
| Letter to Messrs. Spauldings, Ltd. requesting supplies of Spauldite spring interleaving for experimental cars. | 25th Jul 1940 | Box 154a \ 2 scan0317 | |
| Inquiry to Toledo Woodhead Springs Ltd. regarding the stock of Spauldtite for 50' and 56' springs. | 25th Jul 1940 | Box 154a \ 2 scan0318 | |
| Letter from Spauldings Ltd. regarding their inability to supply interleaving material to a specified length. | 26th Jul 1940 | Box 154a \ 2 scan0319 | |
| Availability of Spaulding interleaving for springs. | 29th Jul 1940 | Box 154a \ 2 scan0320 | |
| Request to place an official order with Woodheads for Spauldite interleaving for springs. | 31th Jul 1940 | Box 154a \ 2 scan0321 | |
| Letter to Toledo Woodhead Springs Ltd regarding the supply of Spauldite for a 1000 lb spring. | 31th Jul 1940 | Box 154a \ 2 scan0322 | |
| The dispatch of spring interleaf samples for testing. | 12th Aug 1940 | Box 154a \ 2 scan0323 | |
| Cross-reference note regarding Eaton grooved suspension springs and correspondence with Vauxhall. | 20th Dec 1940 | Box 154a \ 2 scan0324 | |
| Describing the design of the front brakes, pivot, and suspension system for the 'Myth' project. | 20th Dec 1940 | Box 154a \ 2 scan0325 | |
| Letter from British Belting & Asbestos Ltd. regarding a trial of Scandilex belting and arranging to despatch a further 36 ft. | 9th Dec 1940 | Box 154a \ 2 scan0326 | |
| Letter from Rubery Owen & Co. Ltd. regarding a delay in the arrival of experimental springs and tin gaiters. | 1st Jan 1941 | Box 154a \ 2 scan0327 | |
| Letter from Rubery, Owen & Co Ltd regarding a delay in locating and fitting Tin Gaiters to a pair of Leaf Springs. | 3rd Jan 1941 | Box 154a \ 2 scan0328 | |
| Letter from Toledo Woodhead Springs Limited regarding the production of four sample springs and requesting further specifications. | 23th Jan 1941 | Box 154a \ 2 scan0329 | |
| Letter from Howard Graham Ltd. confirming the availability of two dozen Harris Bushes No. 735 from stock. | 29th Jan 1941 | Box 154a \ 2 scan0330 | |
| Letter from Spauldings Ltd. confirming dispatch of material samples. | 29th Jan 1941 | Box 154a \ 2 scan0331 | |
| Letter to Messrs. Rubery, Owen & Co. chasing a delayed order for a set of Tin Gaiters. | 5th Feb 1941 | Box 154a \ 2 scan0332 | |
| Letter from Rubery, Owen & Co. Ltd confirming the dispatch of a set of Tin Gaiters. | 11th Feb 1941 | Box 154a \ 2 scan0333 | |
| Letter to a supplier enquiring about the post-war production of cheaper leaf springs. | 15th May 1941 | Box 154a \ 2 scan0334 | |
| Letter to a supplier proposing a cheaper, post-war version of leaf springs. | 15th May 1941 | Box 154a \ 2 scan0335 | |
| Letter to a supplier regarding the future manufacturing of cheaper leaf springs for post-war cars. | 15th May 1941 | Box 154a \ 2 scan0336 | |
| Requesting the despatch of a pair of road springs to Messrs. Rubery Owen & Co. Ltd. to be fitted with tin gaiters. | 16th May 1941 | Box 154a \ 2 scan0337 | |
| Requesting an official order be issued to Rubery Owen & Co. for a pair of tin gaiters for road springs. | 16th May 1941 | Box 154a \ 2 scan0338 | |
| Letter to supplier Rubery Owen & Co. Ltd. requesting improved specifications for tin gaiters for road springs. | 16th May 1941 | Box 154a \ 2 scan0339 | |
| Letter from Rubery, Owen & Co. Ltd acknowledging receipt of a letter regarding Tin Gaiters fitted to Road Springs. | 19th May 1941 | Box 154a \ 2 scan0340 | |
| Letter from Samuel Fox & Company Limited concerning assistance with a new spring design. | 21th May 1941 | Box 154a \ 2 scan0341 | |
| Letter to Messrs. Rubery Owen & Co. regarding the undertaking of a job and the despatch of springs. | 21th May 1941 | Box 154a \ 2 scan0342 | |
| Letter from Rubery, Owen & Co. Ltd confirming receipt of springs and their forwarding to the Coventry Works. | 22th May 1941 | Box 154a \ 2 scan0343 | |
| Letter to Jonas Woodhead & Sons Ltd. confirming a meeting to discuss springs. | 23th May 1941 | Box 154a \ 2 scan0344 | |
| Letter to Samuel Fox & Company Limited arranging a meeting concerning springs. | 23th May 1941 | Box 154a \ 2 scan0345 | |
| Visit to supplier Samuel Fox & Co. to discuss the design of lubricated springs for post-war use. | 25th Jun 1941 | Box 154a \ 2 scan0346 | |
| Spring lubrication methods and an outline of Fox's spring manufacturing process. | 25th Jun 1941 | Box 154a \ 2 scan0347 | |
| The manufacturing process and stress analysis of leaf springs. | 25th Jun 1941 | Box 154a \ 2 scan0348 | |
| Leaf spring hardness, interleaving, grooved sections, and load grading. | 25th Jun 1941 | Box 154a \ 2 scan0349 | |
| Spring load grading and the treatment of steel for springs. | 25th Jun 1941 | Box 154a \ 2 scan0350 | |
| Patent specification for improvements in laminated springs. | 26th Jul 1939 | Box 154a \ 2 scan0351 | |
| Patent specification for an improved laminated spring design by removing material from the compression surface. | 28th Jun 1940 | Box 154a \ 2 scan0352 | |
| Complete specification drawing showing three figures with cross-sections of grooved or ribbed plates. | 22th Jun 1921 | Box 154a \ 2 scan0353 | |
| Graph showing error in standing height versus spring deflection for various springs under different loads. | 22th Jun 1921 | Box 154a \ 2 scan0354 | |
| Blueprint graph detailing performance characteristics for proposed 50-inch springs under various loads. | 22th Jun 1941 | Box 154a \ 2 scan0355 | |
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