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 providing specifications for a pair of Hypoid gears intended for a Science Exhibition.
| Identifier | ExFiles\Box 145\2\ scan0170 | |
| Date | 2nd September 1937 | |
| 1231 September 2nd.1937 Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls}5/AP. Messrs C.C.Wakefield & Co.Ltd., Research Department, Hayes, MIDDLESEX For the attention of Mr.Evans. Dear Sirs, With regard to the pair of Hypoid gears for the Science Exhibition. They are a pair of gears 8/34 ratio, 10" diameter crown wheel and 45 pinion helix angle, the amount of hypoid being .850". The present state of the gear teeth is due to continued running on an oil of insufficient load carrying capacity. They operate at a normal top gear torque of 350 lbs/ft. and a maximum 1st. speed torque of 950 lbs/ft. The pinion is straddle mounted. We hope from this information you can compile the necessary description. Yours faithfully, FOR ROLLS-ROYCE LTD. | ||