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).
Outline of torque reaction vibration experiments to be conducted on Goshawk I and II engines.
| Identifier | ExFiles\Box 74\4\ scan0080 | |
| Date | 20th September 1923 | |
| To Hs.{Lord Ernest Hives - Chair} from E.{Mr Elliott - Chief Engineer} c. to CJ. BY.{R.W. Bailey - Chief Engineer} X.4604. El/M20.9.23. 105 X.4604. TORQUE REACTION VIBRATION EXPERIMENTS. The experiments that Mr. Royce would like you to make in connection with the above are outlined by him as follows :- (1) Goshawk II. ENGINE SUSPENSION. present suspension plus rigid damping forward. See LeC.1768. (2) Goshawk II. four rigid feet. Is this superior to two rigid feet forward ? (3) Goshawk I. This engine has now flexible mounting in all lateral directions and is understood to give large amplitude vibrations at low speed. Fit with rigid dampings both fore and aft. Try these with various degrees of vigour until they become four solid arms. See LeC.1767. (4) Goshawk II. Get the masses so balanced that the suspension is at the centre of gyration, first by adding weights, and second if successful alter the centre of suspension. If satisfactory control engine by frame with flexible arms forward, with rigid dampers forward in parallel, and rigid dampers back, either or both. (5) Goshawk II. Deep flitch plate added to the frame especially in connection with experiment (2). E.{Mr Elliott - Chief Engineer} | ||