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).
Notes on engine rattles felt on the chassis due to crankshaft periods, with test results.
Identifier | ExFiles\Box 25\3\ Scan022 | |
Date | 20th June 1911 | |
E.H.R. 148 (90 R) cW 157. 24.1.11) G 1410. Engine Period X634 4100. Rattles -, felt on chassis at start. what art. from crankshaft periods, damped out by Setter wheel On 166B. - bad case. If full power rattles higher speeds If less power rattles lower speed. Following tests - full power car speed | Engine speed 3 2/8 gear 22 gear. 9 slight | 270 16-18 noticeable | 430-450. 22.5 bad | 670-680 31 - slight | 950 40-47 - bad | 1250-1460 eP.{G. Eric Platford - Chief Quality Engineer} 20/6/11 | ||