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).
Two options for the Phantom throttle governor control and issues with silencer explosions.
| Identifier | WestWitteringFiles\P\2October1926-December1926\ Scan034 | |
| Date | 2nd November 1926 | |
| TO HS.{Lord Ernest Hives - Chair} FROM R.{Sir Henry Royce} [Text crossed out: C. to BJ. OY. " BY.{R.W. Bailey - Chief Engineer} PN.{Mr Northey} " E.{Mr Elliott - Chief Engineer} GWB.] ORIGINAL PHANTOM THROTTLE. X93 X8140 Originally this was fitted without a governor, opened positively a small amount by hand control. Sales agitated for our old Silver Ghost governor control. We made a better governor, but the throttle valve has more friction, so that at the moment we have two courses - (1) To fit Phantoms as originally, and as 20HP., or (2) To fit stainless roller bearings to throttle spindle, as well as long shaft. Derby is carrying this out, and there is little doubt that (1) is cheaper and simpler, and can be made to do, but (2) adds to the perfection of the chassis. There is some doubt as to which is better from a driver's point of view, depending how the driver handles his car, because, I find unless one shuts the throttle, the car fails to luff up, and also fires more in the silencer. OY. does not agree that this is so. I am not sure because there is much variation between cars, perhaps due to the difference in carburation at slow speed - i.e. a poor slow runner is bad for silencer explosions. HS.{Lord Ernest Hives - Chair} will report on progress of these points. Perhaps good governing or complete closing of the throttle with good slow running means good for silencer bangs. R.{Sir Henry Royce} | ||