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 graph comparing two engine timings for a Peregrine engine, showing B.HP and B.M.E.P. against R.P.M.
| Identifier | ExFiles\Box 1\8\ B001_X100 Engine Chassis-page192 | |
| Date | 29th June 1932 guessed | |
| COMPARISON OF TWO TIMINGS 105.5° SHAFT RM.{William Robotham - Chief Engineer}PR.6 PEREGRINE 5.85 C/R OPEN EX. 1 5/8 S.L. PLUG REACH .950 TAPPET CLCE .004 & .006 VALVES DIA: AND LIFT AS ON RM.{William Robotham - Chief Engineer}PR.5. B.H.P. R.P.M. B.M.E.P. STANDARD TAPPET CLEARANCE Circle 1: Ex. IN 6 9 32 38.5 .020 CLCE Circle 2: Ex. IN 17 31 40 .020 CLCE | ||