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).
Goshawk 11 engine vibration, detailing tests on an out-of-balance slipper wheel.
| Identifier | ExFiles\Box 74\3\ scan0251 | |
| Date | 11th February 1922 | |
| To E.{Mr Elliott - Chief Engineer} from Hs.{Lord Ernest Hives - Chair} c. to CJ. c. to Da.{Bernard Day - Chassis Design} c. to BY.{R.W. Bailey - Chief Engineer} c. to EP.{G. Eric Platford - Chief Quality Engineer} c. to Wor.{Arthur Wormald - General Works Manager} X4221 Hs{Lord Ernest Hives - Chair}1/LG11.2.22 GOSHAWK 11. ENGINE VIBRATION. X4221 Further tests we have carried out, it was found that a slipper wheel which was giving trouble was out-of-balance when each half was tested separately but was in-balance when it was bolted up as a whole. After balancing each individual part separately, it was tried again and this appeared to affect considerable improvement. Hs.{Lord Ernest Hives - Chair} R.R. 285B (100 T.) (S.H. 19B. 10-12-20) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2948 | ||