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).
Drawing No.LeC.1533, which details an extra valve spring and a redesigned valve gear cover nut for the Goshawk 11 engine.
| Identifier | ExFiles\Box 74\3\ scan0253 | |
| Date | 11th February 1922 | |
| To Da.{Bernard Day - Chassis Design} from E.{Mr Elliott - Chief Engineer} c. to CJ c. to Wor.{Arthur Wormald - General Works Manager} c. to BY.{R.W. Bailey - Chief Engineer} c. to HS.{Lord Ernest Hives - Chair} X4221 E1/M11.2.22. GOSHAWK 11. X.4226. X4221 DOUBLE VALVE SPRINGS & MODIFIED VALVE GEAR COVER NUT . We send you herewith drawing No.LeC.1533 shewing an extra valve spring inserted so as to get the speed of the engine up to about 3500 revs. for the purpose of testing in connection with the high speed vibration. It is not necessarily intended that this double valve spring shall be standardised. You will notice that we have cancelled the gland on the valve guide. We also shew on this drawing a redesigned form of valve gear cover nut, as requested by Mr.Hives, on the lines of the one used for the tappet cover. The new pattern is permanently fixed to the cover, and has the advantage of enabling us to cut about ¼" off the fixing studs. E.{Mr Elliott - Chief Engineer} | ||