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).
Adjustments to the Peregrine engine ignition advance timing and governor curve.
| Identifier | ExFiles\Box 1\8\ B001_X100 Engine Chassis-page238 | |
| Date | 22th November 1932 | |
| x 4027a To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} from E.{Mr Elliott - Chief Engineer} E.2/HP.22.11.32. c. to BY.{R.W. Bailey - Chief Engineer} re Peregrine Ignition Advance. With regard to the above, we have your original report Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}5/AD.8.8.32, which showed that the ignition advance required for maximum power was 28° before top dead centre at 1000 r.p.m. You agreed at our request to carry out a test giving the range of timing permissible for each speed before any drop in power was experienced due to too much advance or retard, so that a revised governor curve could be plotted. We should like to get on with this as the governor still remains as originally issued. We now have your memo Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}16/AD.21.11.32, in which you state that the normal timing should be 16° before top dead centre instead of the 28° shown on your curve. We agree that with this new figure the hand control should have its range reduced to half, and the control can be modified accordingly, but we should nevertheless be glad to see the completed curve of timing over the whole speed range so that the whole question of governor and hand advance can be dealt with. E.{Mr Elliott - Chief Engineer} | ||