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).
Engine reliability testing, focusing on the differences in stress between high and low-speed running.
| Identifier | ExFiles\Box 179b\1\ img090 | |
| Date | 21th October 1932 | |
| ---RO.{C. C. Rose - Export Manager}) FROM R.{Sir Henry Royce} HS.{Lord Ernest Hives - Chair} ) C to SG.{Arthur F. Sidgreaves - MD} WOH. B. ORIGINAL R1/21.10.32 ENGINE TESTING. --- From recent experience and observations of power characteristics of various engines, one feels that the reliability of any engine - especially those for car work - should be tested for long hours at full throttle at various speeds below the maximum at which we intend to run the engine, and particularly at the speed of maximum B.M.E.P., such as is shown on the diagram of the Peregrine engine intended for Bensport. It applies with less importance to aero engines, but would occur in the case of aircraft attempting to complete journeys with less than the full number of engines. In other words, the high speed running - although so distressing to certain parts by centrifugal force - is proving less trying than the greater forces and other troubles occurring at lower speed, when the inertia of the pistons is less helpful against the high pressure. I realise you know more of this than I do, but one feels that it is of increased importance. R.{Sir Henry Royce} | ||