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).
Memo from 'R' to a Mr Bentley discussing the design and performance of shaft couplings.
| Identifier | ExFiles\Box 181\M7\ img002 | |
| Date | 1st April 1924 guessed | |
| Shaft Couplings For Mr Bentley Fm R I cannot believe the old one-coupling is right unless it has good workmanship, both machining & fitting of keys Your report that your work demands greater grip than our sellers pattern coupling gives. This shows that our own shafts have very heavy torques, which used to be limited by the slipper drive, I consider it was a mistake to scrap this & put no limit to the motors torque, which with CC motors is enormous before it throws out entirely, probably some of our slipper wheels were set to slip for too low a torque. | ||