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).
Tests on the correct ignition advance for the Peregrine engine at various speeds.
| Identifier | ExFiles\Box 1\8\ B001_X100 Engine Chassis-page213 | |
| Date | 8th August 1932 | |
| To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. Sg.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} c. E.{Mr Elliott - Chief Engineer} Da.{Bernard Day - Chassis Design} c. Bv. Hdy.{William Hardy} X4027av Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}5/AD8.8.32. PEREGRINE IGNITION ADVANCE We have carried out some tests to ascertain the correct ignition advance for Peregrine at various speeds. We attach a curve No. Rm.{William Robotham - Chief Engineer}Pr.21 which shows that the total ignition advance required is only some 12° between 1,000 and 5,000 R.P.M. Tests on 'China' with the J.I cylinder head, showed somewhat similar results, the total ignition advance required being slightly less than 20°. Hs{Lord Ernest Hives - Chair}/Wst. has suggested that since so little ignition advance is required by these engines it might be possible to simplify the governor providing the automatic range. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||