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 efficiency test of a torsion shaft in a 20-25 front axle, plotting load against movement.
| Identifier | ExFiles\Box 102\3\ scan0155 | |
| Date | 21th December 1934 guessed | |
| MFH PERCENTAGE EFFICIENCY 100% 90 80 EFFICIENCY 88.7% EFFICIENCY OF TORSION SHAFT IN 20-25 FRONT AXLE. HYSTERESIS READINGS TAKEN WITH SPRING BALANCE IN "SECONDARY" GIVING DEFINITE SLIP IN SHAFT. EFFICIENCY IS CONSTANT OVER MEASURABLE RANGE BEING EQUAL TO 88.7%. MOVEMENT THOUSANDTHS OF AN INCH 500 400 300 200 100 0 LOAD - LBS. 0 225 325 425 525 625 | ||