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 and observations regarding magneto performance and characteristics.
| Identifier | ExFiles\Box 48\2\ Scan294 | |
| Date | 29th June 1920 | |
| RR 238 (150 BKS.) (BH57.29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. To 19 Order No. 2 Customer's No. being!- a. {Mr Adams} 235 rpm b. 215 " c. 200 " Production limits 230 rpm 210 " 190 " The following points were observed:- Air gap between pole shoes and sleeves .006" Clearance " sleeve ring and bearing .002" Tangential force to move cam lever 2.25 lb Range 63° 2. The performance of this magneto on the leaky gap can be seen better on accompanying curve. 3. Also see curve exhibiting the open circuit volt and closed circuit ampere speed characteristics of this magneto. Signed contd This Sheet must be filed on completion of the work. | ||