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 records of vertical movement on a vibrator at 725 RPM.
| Identifier | ExFiles\Box 112\1\ scan0110 | |
| Date | 1st December 1938 guessed | |
| I - B - 50 RECORDS OF VERTICAL MOVEMENT ON VIBRATOR AT 725 R.P.M. 2 FRONT BUMPER BRACKET .250 .225 RADIUS ARM REAR END .075 .100 DASH BRACKET .050 .125 CENTRE DOOR PILLAR .060 .075 REAR BUMPER BRACKET .150 .150 VIBROGRAPH RATIO 4 TO 1 1.100 1" .250 .320 .100 .400 .225 .270 .480 .450 PENCIL RECORD. FRAME STD PLATES FITTED HORIZONTAL SCALE 1" = 10' | ||