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).
The balance weight scheme for a 25 HP shaft.
Identifier | ExFiles\Box 137\4\ scan0335 | |
Date | 1st May 1931 guessed | |
8 BALANCE WEIGHT SCHEME FOR 25 HP. SHAFT E.55619 (big pin). All balance weights set at 180° to position of crankpin. Nos. 1, 6, 7, 12 of 1 unit such to balance 1/2 of the out of balance per crank of crankshaft only. Nos. 3, 4, 9, 10 opposite cranks 2 and 5 to be 1/2 unit or balance 1/4 of the out of balance per crank. 1 1o 1 unit 1/2 unit 1 and 6 2 units 3 and 4 2 units 2 and 5 2 units No.1 to balance shaded area. | ||