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).
Preliminary test run report on the Peregrine power unit, detailing crankshaft, valve gear, and lubrication observations.
| Identifier | ExFiles\Box 178\4\ img107 | |
| Date | 26th May 1932 | |
| ORIGINAL x4027 R.{Sir Henry Royce} From Ha/Rn.{Mr Robinson} c. Sg.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} c. E.{Mr Elliott - Chief Engineer} Ey. c. Da.{Bernard Day - Chassis Design} Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson}3/MA.26.5.32. 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 3000 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. | ||