From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Request to The British Tyre & Rubber Co. for rubber blocks of specific dimensions and hardness for testing purposes.
| Identifier | ExFiles\Box 154a\4\ scan0149 | |
| Date | 1st April 1941 | |
| Rm {William Robotham - Chief Engineer} /Clm. {D. D. Clapham} 4/ET. 1st April, 1941. Suspension The British Tyre & Rubber Co., Derby Road, BURTON-on-TRENT. 1306 Attention of Mr. Birkbeck. Dear Sirs, We require some blocks of rubber 40/45 durometer hardness for test purposes. The dimensions are 5 1/4" long by 1 3/4" wide by 3/8" thick, and 7" long by 1 3/4" wide by 1/2" thick. Will you please send us 4 pieces of each size. Our official order will follow. Yours faithfully, | ||