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 comparing two design schemes for a crankshaft with performance data.
Identifier | ExFiles\Box 137\4\ scan0350 | |
Date | 16th May 1931 | |
CRANKSHAFT E55619 SUGGESTED SCHEME SCHEME 1402 ROLLS - ROYCE LTD PRINT No 16 MAY. 31 DERBY. SCHEME 1402 - I PER WEIGHT = 27.1 IN4 CRITICAL SPEED = 4200 RPM [12 WTS] SUGGESTED - " " " = 12.55 IN4 " " 4600 RPM [12 WTS] WITH NO BALANCE WEIGHTS 'CRITICAL SPEED' = 5000 RPM | ||