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).
Testing of an autovac petrol feed system from chassis 23-EU.
| Identifier | ExFiles\Box 40\4\ Scan263 | |
| Date | 6th July 1927 | |
| To EP.{G. Eric Platford - Chief Quality Engineer} from Hs.{Lord Ernest Hives - Chair} c. to Bt.{Capt. J. S. Burt - Engineer} c. to D/BP. c. to MY/Mt. 43579 hs{Lord Ernest Hives - Chair}/AJL1/LG6. 7. 27. AUTOVAC PETROL FEED. Ref: Chassis 23-EU. Major Burnham. We have received the autovac taken off the above chassis and find no reason for abnormal misfiring and hesitation caused by its action at slow speeds. There is nothing irregular in its action and in every way it is up to standard. In the memo. BTS/GM17.5.27. it is stated that "the restriction valve was working freely"; there was no restriction valve fitted to the autovac when we received it, the original type suction elbow was fitted. We should have liked to have received this fitting with the autovac. We have compared the autovac with one of our own on an experimental car and cannot appreciate the slightest difference between the two in the effect upon slow running; they are both reasonably good and quite up to standard Owing to the absence of the restriction valve from the autovac off 23-EU. it was necessary to use our own valve in both tests. It would be interesting to know whether any improvement has been effected by fitting the new autovac to the chassis in question; our experience indicates that it is improbable that any improvement would be noticeable. As a general rule the fault follows the engine and not the autovac. Having tried the autovac and found contd :- | ||