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).
Arrangement drawing for a No. 4 Tachometer and a water-related component.
| Identifier | ExFiles\Box 165\3\ img146 | |
| Date | 25th August 1936 guessed | |
| LARGE END DIA = 19/32" TAPER = 1 IN 10 ON RADIUS 1/2" 19/32" 4" 1/16 9" 3/4 7/16 SLOT 7" 3" ARRANGEMENT OF No 4 TACHOMETER WATER | ||