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 variation in angular deflection of a reduction gear spring coupling with increasing torque for Kestrel engines.
| Identifier | ExFiles\Box 179\2\ img264 | |
| Date | 17th February 1932 | |
| "KESTREL" ENGINES CURVE 285'F' REDUCTION GEAR SPRING COUPLING - D.F.S. 1335 VARIATION IN ANGULAR DEFLECTION OF VARIOUS UNITS WITH INCREASING TORQUE MEASURED IN DEGREES OF CRANKSHAFT MOVEMENT A.B.C WITH ORIGINAL SPRING E.36802 A'.B'.C'. - 25% WEAKER - E.38627 ANGULAR DEFLECTION IN CRANKSHAFT DEGREES TORQUE APPLIED TO PROP-SHAFT. (LBS-FT) PROP SHAFT SPRING DRIVE TO REDN GEAR FRONT END OF CRANKSHAFT G.P. 17.2.32 | ||