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 of a 20 HP crankshaft with 8 balance weights.
| Identifier | ExFiles\Box 103\3\ scan0011 | |
| Date | 17th December 1930 | |
| 20 H.P. CRANKSHAFT WITH 8 BALANCE WTS. ILLUSTRATING ARRANGEMENT OF 8 WTS TO BALANCE COUPLES: DRG. RM.{William Robotham - Chief Engineer} 17 DEC. 1930 OF FSA 16/12/30 Measurements: 4.000 2.250" 1.650 1.200 1.200" 1.625" 1.600 2.500" 1.100 | ||