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 force required to operate a .720 worm with motorine coil under various load conditions.
| Identifier | ExFiles\Box 67\4\ scan0348 | |
| Date | 20th July 1927 guessed | |
| .720 WORM WITH MOTORINE COIL (a) RAISING WT. SLOWLY (b) RAISING WT. QUICKLY (c) LOWERING WT. QUICKLY (d) LOWERING WT. SLOWLY Y-AXIS: LBS. FORCE REQUIRED OR EXERTED AT 20" RADIUS. Values: 0, 2, 4, 6, 8, 10, 12, 14 X-AXIS: LOAD ON NUT / LBS. Values: 0, 200, 400, 600, 800, 1000, 1200 GRAPH ANNOTATIONS: PARKING CONDITIONS JOGGLING CONDITIONS | ||