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).
Graph showing the required ignition advance against R.P.M. for the Peregrine engine.
| Identifier | ExFiles\Box 1\8\ B001_X100 Engine Chassis-page214 | |
| Date | 10th August 1932 guessed | |
| IGNITION ADVANCE REQUIRED BY PEREGRINE. RM.{William Robotham - Chief Engineer} PR 21. 5.85 C/R INLET AND EXHAUST VALVE THROAT 1.125 14 M.M. PLUGS .700 REACH OPEN EXHAUST. R.{Sir Henry Royce} P. M.{Mr Moon / Mr Moore} IGNITION ADVANCE REQUIRED FOR MAX POWER DEGREES CRANKSHAFT BEFORE T. D.{John DeLooze - Company Secretary} C. | ||