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).
Letter to Dunlop Rubber Co. Ltd. detailing running test requirements for dynamometer tyres on a 40/50 Chassis.
| Identifier | ExFiles\Box 157\1\ scan0114 | |
| Date | 20th April 1934 | |
| X405 D Exptl. Dept. Hs{Lord Ernest Hives - Chair}/Gry{Shadwell Grylls} 20/KW. 20th April, 1934. Messrs. The Dunlop Rubber Co. Ltd., Fort Dunlop, Erdington, Birmingham. Attention Mr. Price. Dear Sirs, We send you herewith a sketch of the position of the 8" dynamometer tyre you are making for us for our 40/50 Chassis fitted with 20/25 hubs. The running we wish to carry out is - 1 hour at torque per wheel of 545 lbs. ft. at 250 r.p.m. 10 hours " " " " 350 " " 380 r.p.m. 20 " " " " " 250 " " 545 " Can you give us some idea of how long we can run at each speed before allowing the tyres to cool. We hope you will let us have the wheels as soon as possible. Yours faithfully, FOR ROLLS-ROYCE LIMITED. | ||