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).
The prevention of oil vapour in the rotor chamber and proposing tests on a modified distributor unit.
| Identifier | WestWitteringFiles\N\July1925-September1925\ Scan43 | |
| Date | 12th June 1925 | |
| R.R. 493A (50 H) (D.D. 31, 12-6-25) J.H.B. -2- EXPERIMENTAL REPORT. Contd. Expl. No.6680 REF:EFC/T We have put the matter up to the D.O. here give us a temporary experimental contact breaker unit, in which steps are taken to prevent the vapour passing through the top ball bearing. (at present the vent holes in the cylindrical stump do not appear to aggregate a large enough outlet to ease the pressure sufficiently), but it is thought that the matter should be put up to West WitteringHenry Royce's home town with a view to our receiving a modification effectively to prevent oil vapour from reaching the rotor chamber. It might be possible to stop the effect by not ventilating the rotor chamber at all, but we know from experience on the bench that this would not be good from the nitric fumes point of view, for which ample ventilation (more than we have at present) appears to be desirable. The freer the ventilation the more easily the centrifugal action of the rotor assists in bringing oil vapour into the rotor chamber, so that we think this should be prevented at its ingress. We want to test out a modified E.A.C. distributor unit, complete with :- (1) Improved air ventilation (centrifugal pump type), i.e. ingress provided at centre and egress at periphery. (2) Ingress of oil vapour prevented. (3) Improved condenser connections (See our EFC4/T7.5.25). Contd. | ||