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).
Outlining criticisms and proposed changes for the 'Goshawk 11' oil pump and valve push rods.
| Identifier | WestWitteringFiles\G\August1921\ Scan39 | |
| Date | 1st August 1921 | |
| Hs{Lord Ernest Hives - Chair}2/LG ORIGINAL. To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. c. to E.{Mr Elliott - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} - c. to BY.{R.W. Bailey - Chief Engineer} - c. to Wor.{Arthur Wormald - General Works Manager} Hs{Lord Ernest Hives - Chair}2/LGd. 8.21. X4219 "GOSHAWK 11" CRITICISMS CONTD: Oil Pump. We have had trouble with the steel connections which are screwed into the aluminium body and fixed by means of a small peg coming unscrewed when we undo the nut. We find that the small pin has been sheared. We do not consider the steel connection screwed into the aluminium body is sufficiently reliable for car work. We had relatively a considerable amount of trouble with them on the aero engines. One trouble appears to be that when the pump body gets hot it expands and leaves the steel connection rather slack. We strongly recommend that the Goshawk Pump Body should be made of a gunmetal casting. We suggest it may be cheaper than aluminium casting and should be reliable. The aluminium casting has to have bronze bushes cast in besides the steel screw connections. Valve Push Rods. The valve push rods are at present instructed in nickel steel. During our last visit to Mr. Royce we understood him to say that these should be case-hardened. We should like to have definite instructions with regard to this. Hs.{Lord Ernest Hives - Chair} S 'K' 532v (100 L) (2 H.12a 11-8-50) G' 3900 | ||