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).
Issues with friction and 'hunting' in engine controls, boost regulators, and magneto operation.
| Identifier | WestWitteringFiles\U\August1930-November1930\ Scan056 | |
| Date | 11th September 1930 | |
| -3- Hs{Lord Ernest Hives - Chair}/ACL.1/ML.11.9.30 Contd friction in the controls as possible to prevent too great a divergence between the up and down readings. Considerable trouble existed due to violent "hunting" over the constant boost range at ground level as indicated on the chart and we are at the moment working on this by varying the overlap of the piston valve and ports. At the moment the apparatus is not sufficiently "dead beat" during quick throttle and speed changes. It tends to rather overdo the correction and oscillates before giving the required control. SUMMARY. From the tests we have made we find the friction to operate the magneto advance and retard is considerable, with large variations from engine to engine. When coupled to the throttle in the usual way consistent results cannot be obtained from the boost regulator. It appears necessary to reduce the friction of control, throttles etc., to a minimum and would therefore appear advisable to consider some scheme for relieving the boost regulator of the ignition operation and have this operated by the pilot's throttle lever only. Our tests at the moment are confined to the elimination of 'hunting' and obtaining more "dead beat" action. Hs{Lord Ernest Hives - Chair}/ACL. | ||