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).
Suggesting modifications to the propeller shaft centre bearing covers to address noise magnification.
| Identifier | ExFiles\Box 99\4\ scan0104 | |
| Date | 13th June 1938 | |
| EX/DRS. c. Rm.{William Robotham - Chief Engineer} 437 DA.{Bernard Day - Chassis Design}5/G.13.6.38. WALLER what i.w. Sch.3 to be tried first. 7.B.I. B.111. CHASSIS. PROPELLER SHAFT. Please receive herewith G.CD.723 shewing several alternative modifications to the water excluding covers of the propeller shaft centre bearing, to deal with the question of noise magnification, which is complained of with the present covers. It is suggested that Sch.3 as being the simplest and most economical should be made and tried with the washing hose to see if it is sufficiently water tight, and the other schemes only proceeded with if it is found not so. DA.{Bernard Day - Chassis Design} | ||