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).
Instructions to address engine noise from flopping sleeves by modifying the advance lever and cam ring force.
| Identifier | ExFiles\Box 48\2\ Scan222 | |
| Date | 29th June 1920 | |
| RR 238 (150 BKS) (BH57. 29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. WA {Mr Wallis} 105 (2) Customer's No. Investigation having shown that the noise caused by the flopping of the sleeves is often accentuated by the cam ring being insufficiently rigid. NO.2 "The available range of the advance lever should be ascertained and should not be less than 58°." NO 4 In view of the remarks above in relation to the cam ring, it is considered that limits of the tangential force should be raised to from 3 to 5 lbs. Signed contd This Sheet must be filed on completion of the work. | ||