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).
Proposed experiment for damping the Hawk-Northcliffe & 'Seagull' power units using flexible arms and friction discs.
| Identifier | ExFiles\Box 72\4\ scan0010 | |
| Date | 9th January 1923 | |
| To Hs.{Lord Ernest Hives - Chair} from E.{Mr Elliott - Chief Engineer} c. to CJ. BY.{R.W. Bailey - Chief Engineer} EP.{G. Eric Platford - Chief Quality Engineer} X9770 E1/M9.1.23. RE. HAWK-NORTHCLIFFE & 'SEAGULL'. X.3408 X.9770* Referring to the experiment for damping the Hawk- Northcliffe power unit Mr. Royce thinks this should be carried out by securing two stiff plates to the frame, one each side, and reaching out to these from the engine with two flexible arms on each side. These flexible arms are clamped on to the frame plates with 3" dia. discs of ferodo or other friction material sandwiched in between. The arms from the engine,it should be understood, are only flexible laterally and torsion- ally along their own axis. Around the axis of the engine they should be very stiff indeed and incapable of deflection. The clamping for the friction should be done by a central bolt in a clearance hole with suitable spring pressure. It will be seen with this arrangement that the damping will take place in whatever direction the power unit shivers. E.{Mr Elliott - Chief Engineer} | ||