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).
Diagrams illustrating the apparatus and results for measuring friction losses and efficiency in an E.A.C. steering box.
| Identifier | ExFiles\Box 67\3\ scan0178 | |
| Date | 20th July 1925 | |
| FRICTION LOSSES IN E.A.C. STEERING BOX. WHITE METAL LINER NUT. 1.125 LEAD WORM SHAFT SUPPORTED & FIXED BALL BEARINGS CARRYING LOAD BALANCE WT. BALL BEARING TO WHICH SPG. BALANCE IS ATTACHED SPRING BALANCE GIVING EFFORT TO ROTATE NUT TO RAISE LOAD TOTAL LOAD 1200 lbs. APPARATUS USED FOR MEASURING THREAD & CHEESE EFFICIENCY SPG. BALANCE GIVING EFFORT TO ROTATE CHEESES IN NUT BALANCE WT. TORQUE APPLIED ABOUT AXIS A.A. LOAD CARRIED BY END OF PENDULUM LEVER APPARATUS FOR DETERMINING THE OVERALL EFFICIENCY 1200 lbs CHEESES. EFFICIENCY 91.4% IN TRANSMITTING TORQUE TO ROCKER SHAFT THREAD EFFICIENCY 66.3% ROCKER SHAFT BEARINGS EFFICIENCY 96% ROLLS-ROYCE LTD. PRINT ROOM 21 JUL 1925 DERBY A.C.L 20/7/25 | ||