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).
Modification to the Goshawk 11 cylinder head to prevent cracking when running without water.
| Identifier | ExFiles\Box 48\4\ Scan070 | |
| Date | 13th June 1932 | |
| X4226 To Da.{Bernard Day - Chassis Design} from E.{Mr Elliott - Chief Engineer} c. to CJ. Wor.{Arthur Wormald - General Works Manager} c. to BY.{R.W. Bailey - Chief Engineer} Hs.{Lord Ernest Hives - Chair} c. to EP.{G. Eric Platford - Chief Quality Engineer} E1/M13.6.32. GOSHAWK 11 CYLINDER HEAD. MODIFICATION TO REDUCE LIABILITY OF CRACKING THE JACKET OF EXHAUST VALVE SEAT WHEN ENGINE IS RUNNING WITHOUT WATER. X.4225. X.4240. X.4226. We send herewith drawing No.LeC.1596 shewing the // above. This drawing illustrates the modifications referred to by Mr. Royce in his recent memo, and also shews a design for a sparking plug spanner especially for use with the Goshawk. Would you kindly send a model of this spanner to WW. and cancel the instructions to send one of the spanners used for aero engines. We are anxiously awaiting the results of the Expl: Dept's tests to determine whether the Goshawk cylinder head is benefitted by having 3 water outlets on the side instead of one at the front end. What we want to know is does the former system reduce the amount of steam in the water system when the water boils and thus save any of the amount of water thrown away in the overflow. If we do find it necessary to have 3 water outlets on the side, then some further design work is necessary on the scheme of ignition wiring, and the radiator will also have to be made suitable but this design work will not be proceeded with until we receive the report of the Expl:Dept: E.{Mr Elliott - Chief Engineer} | ||