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).
The stiffness and natural frequency of a supercharger drive.
| Identifier | ExFiles\Box 2\3\ B002_X 116 117 119 120-page15 | |
| Date | 25th June 1932 guessed | |
| -2- SUPERCHARGER. The stiffness of the drive to this, a .650 dia solid shaft 8.700 long is 23800 lbs ins/radian. The natural frequency of the supercharger on its drive is 105/sec. This would lower the critical speed of the crankshaft. We suggest that the stiffness of the drive be reduced to about 1/3 its present value. Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} | ||