| Description | Date | Identifier | |
| Letter to Avon India Rubber Co. Ltd. regarding tyre squealing on experimental cars and a request for new samples. | 10th Oct 1940 | Box 156 \ 3 scan0202 | |
| Letter from The Avon India Rubber Co. Ltd. regarding squealing tyres and arranging a competitive tyre test. | 14th Oct 1940 | Box 156 \ 3 scan0203 | |
| Letter to Avon India Rubber Co. regarding tyre testing, tread pattern modifications and arranging a visit. | 18th Oct 1940 | Box 156 \ 3 scan0204 | |
| Test record and return instruction for a set of 6.50 x 16 Avon tyres. | 2nd May 1940 | Box 156 \ 3 scan0205 | |
| Squealing issues with Avon tyres and the consideration of semi-pilotte tyres for a small car, focusing on the impact on steering lock. | 29th Oct 1940 | Box 156 \ 3 scan0206 | |
| Specification table for S.M.M.T. tyres listing sizes, widths, rim types, load capacities, and inflation pressures. | 16th Aug 1940 | Box 156 \ 3 scan0207 | |
| Letter from Seiberling Rubber Company discussing the development and testing of wide base tyres pioneered by Firestone. | 16th Aug 1940 | Box 156 \ 3 scan0208 | |
| Specification table for Avon tyres, detailing sizes, widths, rim types, maximum loads, and inflation pressures. | 16th Aug 1940 | Box 156 \ 3 scan0209 | |
| Letter from Seiberling Rubber Company regarding the development and testing of wide base tires. | 16th Aug 1940 | Box 156 \ 3 scan0210 | |
| Letter from a tyre supplier regarding a meeting and the delivery of test tyres for a Corniche model. | 23th Oct 1940 | Box 156 \ 3 scan0211 | |
| Letter to J.C. Mackay of Avon India Rubber Co. Ltd. confirming a meeting. | 25th Oct 1940 | Box 156 \ 3 scan0212 | |
| Letter from Avon India Rubber Co. regarding amendments to tyre moulds to address tyre squealing and also discussing wide base tyres. | 16th Nov 1940 | Box 156 \ 3 scan0213 | |
| Comparison of Michelin Pilote tyres with American wide base rim development, focusing on rim widths, load capacities, and construction. | 25th Nov 1940 | Box 156 \ 3 scan0214 | |
| Letter from a tyre manufacturer regarding tyre comfort, an American programme, dimensions of 16' tyres, and the supply of test tyres. | 25th Nov 1940 | Box 156 \ 3 scan0215 | |
| Letter from Seiberling Rubber Company to The Avon India Rubber Co. Ltd. regarding the development of wide base tires. | 2nd Oct 1940 | Box 156 \ 3 scan0216 | |
| Specification table for the Wide Base Rim Program, comparing present and experimental practices for various tire sizes. | 1st Sep 1940 | Box 156 \ 3 scan0217 | |
| Dimensions and weights table for Avon Standard Silent Tyres (4 ply). | 18th Nov 1940 | Box 156 \ 3 scan0218 | |
| Specification table detailing the dimensions of Michelin Pilote tyres. | 12th Nov 1940 | Box 156 \ 3 scan0219 | |
| Proposed alteration to a 650/16 silent mould. | 12th Nov 1940 | Box 156 \ 3 scan0220 | |
| Blueprint showing the design and dimensions for a 6.50/16 Avon L.P. Passenger Tyre, Type R.B. | 20th May 1939 | Box 156 \ 3 scan0221 | |
| Blueprint drawing of three different Michelin 'Broadbase' rims. | 28th Nov 1940 | Box 156 \ 3 scan0222 | |
| Letter from Avon India Rubber Co. Ltd. discussing the two-stage re-cutting of a 6.50/16 tyre mould. | 28th Nov 1940 | Box 156 \ 3 scan0223 | |
| Letter to The Avon India Rubber Co., Ltd. regarding the testing of their tyres and rims. | 30th Nov 1940 | Box 156 \ 3 scan0224 | |
| Letter to Mr. Mackay of The Avon India Rubber Co. thanking him for information on tyres and rims and acknowledging receipt of tyres for testing. | 30th Nov 1940 | Box 156 \ 3 scan0225 | |
| Letter to The Avon India Rubber Co., Ltd. acknowledging expositions on tyres and rims and awaiting tyres for testing. | 30th Nov 1940 | Box 156 \ 3 scan0226 | |
| Dispatch instruction for returning four Avon tyres for examination to the Avon India Rubber Co. | 6th Jan 1941 | Box 156 \ 3 scan0227 | |
| Letter to Avon India Rubber Co. returning four tyres from a Bentley for examination, detailing their serial numbers, position, and mileage. | 5th Jan 1941 | Box 156 \ 3 scan0228 | |
| Letter from a tyre supplier explaining a delivery delay due to a factory breakdown. | 3rd Dec 1940 | Box 156 \ 3 scan0229 | |
| Letter to Avon India Rubber Co. Ltd. regarding a delay in the despatch of tyres. | 9th Dec 1940 | Box 156 \ 3 scan0230 | |
| Letter from Avon India Rubber Co. Ltd concerning the dispatch of standard and experimental tyres for testing. | 9th Jan 1941 | Box 156 \ 3 scan0231 | |
| Letter to the Avon India Rubber Co., Ltd. enquiring about a delay in the delivery of special tyres. | 9th Jan 1941 | Box 156 \ 3 scan0232 | |
| Letter from The Avon India Rubber Co. Ltd. regarding a delay in tyre delivery for testing. | 16th Jan 1941 | Box 156 \ 3 scan0233 | |
| Requesting to charge an invoice from Avon India Rubber Co. Ltd. for £1.6.10. | 19th Jan 1941 | Box 156 \ 3 scan0234 | |
| Letter from Avon Tyres confirming the despatch of various tyre covers and tubes for testing purposes. | 20th Jan 1941 | Box 156 \ 3 scan0235 | |
| Letter to The Avon India Rubber Co. Ltd. acknowledging correspondence regarding the supply of tyres. | 23th Jan 1941 | Box 156 \ 3 scan0236 | |
| Comparative weights analysis of Avon and Dunlop tyres. | 27th Jan 1941 | Box 156 \ 3 scan0237 | |
| Letter from Avon confirming the despatch of tyres and tubes for testing purposes. | 27th Jan 1941 | Box 156 \ 3 scan0238 | |
| Requesting an official order for various tyres and tubes from the Avon India Rubber Co. Ltd. | 28th Jan 1941 | Box 156 \ 3 scan0239 | |
| Testing of new Avon tyres with a modified pattern to eliminate squealing. | 21th Feb 1941 | Box 156 \ 3 scan0240 | |
| Letter from Avon India Rubber Co. regarding tyre modifications and wide base rim development. | 2nd May 1941 | Box 156 \ 3 scan0241 | |
| Letter from Avon India Rubber Company discussing tyre and rim fitment specifications and upcoming rim design changes. | 17th Mar 1941 | Box 156 \ 3 scan0242 | |
| Letter from Seiberling Rubber Company regarding the experimental 'safety rims' used on 1941 Chrysler cars. | 17th Mar 1941 | Box 156 \ 3 scan0243 | |
| Program for the Passenger Car Tire Wide Rim Meeting sponsored by The Tire and Rim Association, Inc. | 8th Nov 1940 | Box 156 \ 3 scan0244 | |
| Specification sheet for tire and rim combinations, including recommended, permissible, and experimental options, along with estimated sectional diameters. | 25th Oct 1940 | Box 156 \ 3 scan0245 | |
| Consensus of experience from large tire companies on the performance of passenger car tires on wide base rims. | 25th Oct 1940 | Box 156 \ 3 scan0246 | |
| The effects of rim width on vehicle handling, comfort, and tire performance. | 25th Oct 1940 | Box 156 \ 3 scan0247 | |
| Blueprint detailing Chrysler bead seat contours for 16 inch diameter (and smaller) low pressure balloon tyres. | 25th Oct 1940 | Box 156 \ 3 scan0248 | |
| Diagram showing the experimental practice for wide base rim contours for passenger car tyres. | 25th Oct 1940 | Box 156 \ 3 scan0249 | |
| Experimental wide base rim contours for 16 inch passenger car tyres. | 17th Jan 1941 | Box 156 \ 3 scan0250 | |
| Blueprint showing experimental wide base rim contours for passenger car tyres. | 25th Oct 1940 | Box 156 \ 3 scan0251 | |
| Cross-section drawings of four different Avon tyre and rim combinations. | 8th Feb 1941 | Box 156 \ 3 scan0252 | |
| Blueprint showing various Avon tyre and rim cross-sections and their dimensions. | 8th Feb 1941 | Box 156 \ 3 scan0253 | |
| Blueprint comparing the cross-sections of two different Avon tyre and rim combinations. | 8th Feb 1941 | Box 156 \ 3 scan0254 | |
| Letter to Avon India Rubber Co. Ltd regarding tyre testing, squealing problems, and scheduling a meeting. | 6th May 1941 | Box 156 \ 3 scan0255 | |
| Letter from Avon India Rubber Co. Ltd. comparing Buick's tyre and rim specifications for 1941 and 1942 models. | 12th May 1941 | Box 156 \ 3 scan0256 | |
| Letter to Avon Tyre Rubber Co. Ltd. regarding tyres used in the States. | 14th May 1941 | Box 156 \ 3 scan0257 | |
| Request to carry out a comparative squealing test between India tyres and the latest tread from Avon. | 25th May 1941 | Box 156 \ 3 scan0258 | |
| Letter to Doctor Mackay of The Avon India Rubber Co., Ltd., detailing the results of comparative tyre tests. | 26th May 1941 | Box 156 \ 3 scan0259 | |
| Letter from The Avon India Rubber Co. Ltd. regarding experimental tyres to fix a squealing issue. | 11th Jul 1941 | Box 156 \ 3 scan0260 | |
| Letter from Avon India Rubber Co. Ltd. discussing a new tyre mould with a different tread pattern. | 15th Jul 1941 | Box 156 \ 3 scan0261 | |
| Letter to Avon India Rubber Co. regarding unacceptable tyre squeal noise in hot weather. | 15th Jul 1941 | Box 156 \ 3 scan0262 | |
| Letter from Avon India Rubber Co. Ltd. concerning tyre and rim details for a Standard Bentley Chassis. | 16th Jul 1941 | Box 156 \ 3 scan0263 | |
| Blueprint detailing the experimental practice for a wide base rim contour for 16 inch passenger car tyres. | 30th Oct 1940 | Box 156 \ 3 scan0264 | |
| Blueprint diagram for an experimental wide base rim contour for passenger car types. | 30th Oct 1940 | Box 156 \ 3 scan0265 | |
| Letter from Avon India Rubber Co. Ltd. regarding the despatch of four different types of test tyres and their serial numbers. | 23th Jul 1941 | Box 156 \ 3 scan0266 | |
| Squeal tests for different types of Avon tyres. | 1st Aug 1941 | Box 156 \ 3 scan0267 | |
| Letter from Avon India Rubber Co. Ltd. regarding the performance of a modified 6.50/16 tyre and arranging a follow-up meeting. | 27th Aug 1941 | Box 156 \ 3 scan0268 | |
| Letter to Avon India Rubber Co. Ltd. enclosing a report on tyres and inviting discussion on recent modifications. | 21th Aug 1941 | Box 156 \ 3 scan0269 | |
| Typed letter to Dr. I.G. Mackay of The Avon India Rubber Co., Ltd. regarding scheduling a meeting. | 29th Aug 1941 | Box 156 \ 3 scan0270 | |
| Letter from Avon Tyres regarding the testing of different tyre models to address squealing on corners. | 16th Sep 1941 | Box 156 \ 3 scan0271 | |
| Letter from the Avon India Rubber Company discussing tyre performance, comparing five-bar and four-bar designs. | 5th Dec 1941 | Box 156 \ 3 scan0272 | |
| Letter from a tyre manufacturer regarding tyre noise and tread pattern testing. | 5th Dec 1941 | Box 156 \ 3 scan0273 | |
| Squeal tests for three categories of Avon tyres. | 16th Dec 1941 | Box 156 \ 3 scan0274 | |
| Testing different Avon tyre types for squeal. | 16th Dec 1941 | Box 156 \ 3 scan0275 | |
| Cover letter to The Avon India Rubber Co. Ltd. enclosing a report on the behaviour of tyres. | 22th Dec 1941 | Box 156 \ 3 scan0276 | |
| The squealing performance of special tyres supplied by Avon India Rubber Co. | 16th Dec 1941 | Box 156 \ 3 scan0277 | |
| Letter from Avon India Rubber Co. Ltd. regarding the design and trial of modified tyres. | 25th Dec 1941 | Box 156 \ 3 scan0278 | |
| Letter from The Avon India Rubber Co. Ltd. reporting the death of 2nd Lieut. S. Lovell-Hewitt. | 19th Jan 1942 | Box 156 \ 3 scan0279 | |
| Letter of condolence to Mr. Comley on the death of Mr. Hewitt. | 24th Jan 1942 | Box 156 \ 3 scan0280 | |
| Letter from Avon India Rubber Company regarding experimental passenger tyres being sent for testing. | 3rd Apr 1942 | Box 156 \ 3 scan0281 | |
| Letter acknowledging receipt of a set of tyres from Avon India Rubber Co. for testing. | 4th May 1942 | Box 156 \ 3 scan0282 | |
| Article from a series on fuel efficiency, detailing the checks for transmission and wheel alignment. | 1st Oct 1914 | Box 156 \ 4 scan0001 | |
| Internal memorandum regarding a letter and booklet for a 'Scott Patent Cushdrive' flexible transmission. | 4th Aug 1921 | Box 156 \ 4 scan0002 | |
| Copy of a letter from Walter Scott offering his patented 'Cushdrive' flexible transmission. | 3rd Aug 1921 | Box 156 \ 4 scan0003 | |
| Letter discussing a 'chunking' noise in the transmission and its relation to slack in the high-speed dogs and rear spring types. | 19th Aug 1921 | Box 156 \ 4 scan0004 | |
| Letter regarding engine missing issues, with an attached mirrored copy of a report discussing suspension performance and 'gumptioning'. | 1st Aug 1921 | Box 156 \ 4 scan0005 | |
| Design and implementation of an 'Anti Groan Device' for existing cars and the 'V' series. | 22th Dec 1924 | Box 156 \ 4 scan0006 | |
| Source and potential solution for 'groans' on a standard chassis. | 23th Dec 1924 | Box 156 \ 4 scan0007 | |
| Forwarding a report about transmission groans on 40/50 cars, specifically Sir Mortimer Singer's car. | 1st Jan 1925 | Box 156 \ 4 scan0008 | |
| The re-testing and diagnosis of a noise issue in car number 68-TM for Sir Mortimer Singer. | 23th Dec 1924 | Box 156 \ 4 scan0009 | |
| Information about the characteristics of transmission groans to aid in current investigations. | 5th Jan 1925 | Box 156 \ 4 scan0010 | |
| Coupling sleeve modification for 40/50 cars experiencing groans. | 9th Jan 1925 | Box 156 \ 4 scan0011 | |
| Diagnosing transmission groans, boominess, and roughness in a vehicle at various speeds. | 9th Jan 1925 | Box 156 \ 4 scan0012 | |
| The ongoing work on car 68-AU for a transmission drive groan and the delay in its re-delivery. | 26th Jan 1925 | Box 156 \ 4 scan0013 | |
| 10 lbs sample of Whitmore Transmission Compound submitted for trial by George H. Alexander Machinery Ltd. | 22th Jun 1926 | Box 156 \ 4 scan0014 | |
| Informational leaflet about Whitmore's Spring Composition for protecting automobile springs. | 22th Jun 1926 | Box 156 \ 4 scan0015 | |
| Promotional leaflet cover for Whitmore Manufacturing Co. lubricants, distributed in the UK by Geo. H. Alexander Machinery Ltd. | 26th Aug 1926 | Box 156 \ 4 scan0016 | |
| Request to the laboratory for a report on a sample of Whitmore Transmission Compound. | 26th Aug 1926 | Box 156 \ 4 scan0017 | |
| Letter from a consulting engineer regarding the 'Spontan' Patent Transmission, referencing an article in 'Engineering' magazine. | 18th Nov 1927 | Box 156 \ 4 scan0018 | |
| Letter to the Managing Director detailing the features and benefits of a 'Spontan' Patent Transmission. | 18th Nov 1927 | Box 156 \ 4 scan0019 | |
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