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 showing the oil grooves in a dynamo drive bush for a Super Sports engine.
| Identifier | ExFiles\Box 92\2\ scan0014 | |
| Date | 5th September 1928 | |
| V404 FOR ALL OTHER DIMENSIONS SEE E77346. ROLLS-ROYCE, LIMITED PRINT ROOM, 5 SEP 1928 DERBY .312 +5 .125 +.20 1.130 +.5 DIA. .075 +.20 1.050 CTR +.10 SPIRAL GROOVE (R.H.), .040 WIDE x .015 DEEP, ONE COMPLETE TURN. OIL GROOVES IN DYNAMO DRIVE BUSH. (SUPER SPORTS ENGINE) J.A.P. 20-6-28 | ||