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).
Camshaft performance and general power improvements for the Peregrine engine.
| Identifier | ExFiles\Box 179b\2\ img108 | |
| Date | 14th November 1938 | |
| -3- Ha/RB.{R. Bowen}S/Ms.14.11.38. Cont'd Camshafts. We have now what we believe to be a satisfactory camshaft which is to gas forms [Lat.3235] having a carburettor box and 1070 between the cams. The difference between the performance with these can forms, and the previous ones will be seen from a comparison of curves 8 on No. P.34 with 2 on No.Pr.33. The loss in top h.p. is not more than 2% while the gain in low speed M.E.P. is 7% at 1000 R.P.M. Slow running between 150 & 200 R.P.M. can be obtained. General Power Improvement Increase. Curve 8 on No. P.34 shows the general improvement that has so far been made in Peregrine power output. The low speed M.E.P. has been increased 18% from 1000 to 3000 R.P.M. whilst still retaining a b.h.p. of over 700. The main items of improvement have been, short bushed camshaft, long reach plugs, small inlet valves, flexible pistons and Turbulent head. Ha/Rm.{William Robotham - Chief Engineer} 5 prints Att: 1 Photograph. | ||