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).
The Goshawk 11 power unit suspension with arms on the front of the crankcase.
| Identifier | WestWitteringFiles\K\September1923\ Scan101 | |
| Date | 12th September 1923 | |
| TO HY.{Tom Haldenby - Plant Engineer} FROM E.{Mr Elliott - Chief Engineer} c. to SJ. c. to HS.{Lord Ernest Hives - Chair} c. to WP. ORIGINAL E1/M12.9.23. 2 X3535 X4604 GOSHAWK 11. SUSPENSION OF POWER UNIT WITH ARMS ON FRONT END OF CRANKCASE. We send you herewith drawings Nos. LeC. 1763 & 4 dealing with the above. The object of suspending the power unit in this manner is to eliminate as far as possible the torque reaction vibration which occurs at about 20. M.P.H. on the Goshawk. There are one or two details of the bolting not completed on LeC.1763 but we think you will be able to do this at Derby. You will notice that the lower member of the truss on this drawing is removable, enabling the lower half of the crankcase to be detached. You will also notice that the arms are so arranged that the complete power unit can be dropped out very easily. E.{Mr Elliott - Chief Engineer} | ||