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).
Blueprint diagram of a Salerni coupling in its free-wheeling position.
| Identifier | WestWitteringFiles\U\August1930-November1930\ Scan184 | |
| Date | 11th November 1930 guessed | |
| SALERNI COUPLING IN FREE WHEELING POSITION SLIDING MEMBER ON 3RD MOTION SHAFT FIXED MEMBER SPLINED ON PROP: SHAFT SYNCHRONISER RING FLOATS FREELY ON SLIDING MEMBER X Y Z P | ||