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).
Performance comparison of alterations to the Peregrine engine to improve low-speed torque.
| Identifier | ExFiles\Box 1\10\ B001_X106 TO X 110-page052 | |
| Date | 25th August 1932 | |
| COMPARISON OF PEREGRINE ALTERATIONS TO IMPROVE LOW SPEED TORQUE RM.{William Robotham - Chief Engineer} PR.{Percy H. Rose} 23 PERFORMANCE (A) REDUCED TOE 2: 1 1/4 S.U. CARBS INLET VALVES .125 THROAT (B) STD TOE ONE 1 5/8 CARBS S.U. .200" 5.85 C/R OPEN EXHAUST 14 M.M. A.15 PLUGS TOE .045 Diagram A: EX 38, IN 34, Top 3 8 TOE REDUCED TO .007 106° BET CAMS BY 16/W21 T 32 Diagram B: EX 38, IN 29, Top 2 12 .020 CLCE ALL CURVES TAKEN WITH .004 AND .006 CLCE 25/8/32 B.H.P B.M.E.P. R.P.M. 15 M.P.H. 25 | ||