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 detailing the inverted plan of oil drain grooves in a governor housing for a Super Sports Engine.
| Identifier | WestWitteringFiles\S\September1928-October1928\ Scan013 | |
| Date | 5th September 1928 | |
| TWELVE SLOTS EQUALLY SPACED, THUS:- V405 .250 ± .010 2.000 DIA ± .010 INVERTED PLAN (E77684) OIL DRAIN GROOVES IN GOVERNOR HOUSING (SUPER SPORTS ENGINE) [Stamp Text]: ...CE. LIMITED PRINT ROOM, 5 SEP 1928 DERBY. | ||