Failure of a silencer cutout design for the Goshawk 11 engine and proposing a new attempt.
| Identifier | WestWitteringFiles\I\October1922\ Scan19 | |
| Date | 9th October 1922 | |
| R.R. 235 A (100 T) (S.F. 216 6-S-19) G. {Mr Griffiths - Chief Accountant / Mr Gnapp} 2480 ORIGINAL, To HS. {Lord Ernest Hives - Chair} from R. {Sir Henry Royce} R6/M9.10.22. GOSHAWK(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) 11. SILENCER & CUTOUT. X4269 I am sorry that our attempt at the cutout is a failure. I do not want to revert to the scheme we adopted in the 40/50 for many reasons, so that we shall probably try again. I had thought that a butterfly valve could be embodied more easily than the valve we had fitted but I am not sure that it can be made close enough for second direct outlet. Evidently it is necessary to have a second opening in addition to the fishtail or more area at the fish-tail. Will you try a second fishtail always in use with present silencer to see if a wider one could always be in use? R. {Sir Henry Royce} RECEIVED stamp: Hs {Lord Ernest Hives - Chair} OCT 11 1922 stamp: Hs {Lord Ernest Hives - Chair} OCT 11 | ||
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).