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).
Graph showing vibration variation during a power curve run on a liquid-cooled single-cylinder sleeve valve engine.
| Identifier | ExFiles\Box 134\1\ scan0107 | |
| Date | 13th October 1938 | |
| LIQUID COOLED SINGLE CYLINDER SLEEVE VALVE 4.2 BORE VS{J. Vickers}1 VARIATION OF VIBRATION DURING A POWER CURVE RUN AT 16 BOOST RANGE OF VIBRATION INCHES X 10⁻³ 50 40 30 20 10 x PLUG INSERT o CENTRE HEAD □ HEAD FLANGE ∇ CRANKCASE CRANKSHAFT R.P.M. 3000 3400 3800 4200 4600 LR{Mr Ellor}/HWS/SGL 13/10/38 | ||