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).
Two high-speed oil consumption runs for a Peregrine Power Unit, noting an inlet valve spring failure.
| Identifier | ExFiles\Box 1\8\ B001_X100 Engine Chassis-page209 | |
| Date | 28th July 1932 | |
| 84027a. R.{Sir Henry Royce} From Ha/Rm.{William Robotham - Chief Engineer} c. to Sg.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} c. to R.{Sir Henry Royce} By.{R.W. Bailey - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} Hdy.{William Hardy} Ha/Rm.{William Robotham - Chief Engineer}3/WJ.28.7.32. PEREGRINE POWER UNIT. We have now conducted two high speed runs for oil consumption: Time Run. R.P.M. B.H.P. Developed. Oil Consumed. Consumption Pts/BHP/Hr. 1 Hour. 4000 60 1 pint. .017 2 Hours. 4750 56 3 pints. .027 The only trouble experienced was one inlet valve spring which broke on first running up to 4750 R.P.M. This fractured in the centre, an unusual place, which may have been due to a flaw in the wire. The low top power was due to a make-shift camshaft and induction pipe being used. The amount of oil cooling required appeared to be rather large, we kept the inlet down to 70°C. but the outlet rose to 100°C. We are, however, investigating this further. There was no loss of power during the run. Ha/Rm.{William Robotham - Chief Engineer} | ||