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).
The preliminary test runs of the Peregrine power unit, detailing issues with the crankshaft, valve gear, and lubrication.
| Identifier | ExFiles\Box 1\8\ B001_X100 Engine Chassis-page183 | |
| Date | 28th September 1932 | |
| R.{Sir Henry Royce} From Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} c. Sg.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} c. E.{Mr Elliott - Chief Engineer} By.{R.W. Bailey - Chief Engineer} c. Da.{Bernard Day - Chassis Design} PEREGRINE. We have now had some preliminary runs on this power unit. Crankshaft The crankshaft half speed periods were as follows :- Complete damper in position 2400 R.P.M. Damper inside wts removed 2550 R.P.M. Damper drum removed 2700 R.P.M. Valve Gear. This runs up to 5000 R.P.M. without any signs of bouncing. The overhanging rocker pedestals suffer from the same trouble as on J.III i.e. deflection. We have broken three of these on J.III and temporarily overcome the fracture by making the pedestals in steel. We are repeating this on Peregrine. Lubrication. The supply of oil to the camshaft well is somewhat over liberal, but this is easily modified and presents no difficulty. It actually emptied the crank case into the rocker cover via the push rod passages on first starting up. | ||