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).
Modification to the oil drain slots in the governor housing of an S.S. Engine.
| Identifier | ExFiles\Box 65\1\ scan0214 | |
| Date | 30th August 1938 | |
| THESE SLOTS INCREASED FROM 6 SLOTS .125 WIDE To 12 SLOTS .250 WIDE BY .075 DEEP Oil Drain Slots In Governor Housing Of S.S. Engine ael& 30/8/38 | ||