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).
Proposing a chassis test for a Phantom cylinder head with opposed sparking plugs to investigate engine popping.
| Identifier | WestWitteringFiles\O\January1926-March1926\ Scan76 | |
| Date | 23th February 1926 | |
| TO HS.{Lord Ernest Hives - Chair} FROM E.{Mr Elliott - Chief Engineer} Copy to C.L. (crossed out) " R.{Sir Henry Royce} (crossed out) " RG.{Mr Rowledge} (crossed out) " BY.{R.W. Bailey - Chief Engineer} (crossed out) ORIGINAL (stamp) E3/M23.2.26. X8230 X.8050 (handwritten) X8070 (handwritten) re. PHANTOM CYLINDER HEAD WITH OPPOSED SPARKING PLUGS. The above cylinder head has been tested on the bench and its bearing on the question of detonation has been investigated. There is a further test however which should be made with this head on a chassis, and that is to determine the effect of the form of induction pipe used on the phenomenon of popping in the silencer. Some time ago RG.{Mr Rowledge} suggested that an induction manifold that got rid of the residuary petrol by draining the fuel into the engine, the effect of popping in the silencer was eliminated, or reduced to a minimum. The Phantom head with opposed sparking plugs has an induction manifold of this type, and was earmarked by R.{Sir Henry Royce} for this test. The object of this memo. is to find out if the experiment is being made, or to revive the matter if the point has been overlooked. E.{Mr Elliott - Chief Engineer} CE (handwritten initials) RECEIVED (partial upside-down stamp) | ||