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).
Modification to a Zenith filter to resolve an issue with trapped air after cleaning.
| Identifier | ExFiles\Box 44\1\ Scan113 | |
| Date | 5th April 1923 guessed | |
| contd :- -5- if broken, will prevent the running of the car. We found that after cleaning the Zenith filter, a certain amount of the air was trapped in the system. We have incorporated a few small breathing holes indicated in the sketch attached, which have overcome this trouble. Attached to this report are micro-photographs of :- (a) Fluff actually extracted from jet. (b) Standard filter gauze. (c) Samples that has passed through std. filter. (d) Ditto - per Zenith. Hs{Lord Ernest Hives - Chair}/W.A.Robotham. | ||