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 the variation of vibration with boost for a liquid-cooled single-cylinder sleeve valve engine.
| Identifier | ExFiles\Box 134\1\ scan0109 | |
| Date | 13th October 1938 | |
| LIQUID COOLED SINGLE CYLINDER SLEEVE VALVE 4 1/2" BORE VS{J. Vickers} 3 VARIATION OF VIBRATION WITH BOOST ENGINE RUN AT 3920 RPM RANGE OF VIBRATION [INCHES x 10^-3] * PLUG INSERT ○ CENTRE HEAD ⊕ HEAD FLANGE ∇ CRANKCASE INCHES Hg BOOST LR{Mr Ellor}/HWS/SGL 13/10/38 | ||