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).
Blueprint detailing the optical measurement of flywheel vibrations.
| Identifier | ExFiles\Box 137\4\ scan0152 | |
| Date | 24th December 1930 | |
| OPTICAL MEASUREMENT OF FLYWHEEL VIBRATIONS 10" FOCUS LENS POINT SOURCE OF LIGHT WITH .025" APERTURE MIRROR TO RUN MOST IN TRUTH AT 1000 RPM 54.5" FROM MIRROR 1/100" DEFLECTION ON SCREEN = 0.917 x 1/10000 RADIANS AT FLYWHEEL 1" ON SCREEN = .0595" AT FLYWHEEL CIRCUMFERENCE ROLLS-ROYCE LIMITED RECEIVED 24 DEC 1930 CR{Mr Cra???ster / Mr Chichester} | ||