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 machine performance curves and settings.
| Identifier | ExFiles\Box 62\3\ scan0056 | |
| Date | 8th December 1924 | |
| RR. 238 (150 BKS.) (DB{Donald Bastow - Suspensions} 461-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To______________________________________________19__ Order No.__________________ Customer's No. __2__ With a setting of 125° the attached curves were obtained. The curve I for normal condition is good as regards cutting in and maintenance of output at high speeds, but not quite as good as N machine for peak output. The machine was sent for fitting to 18 G II with a half-charge switching scheme, but before sending the control brush was moved to 124° it being deemed easily possible to deliver another ampere or so without damage with the switching scheme employed. Signed_________________ JHC This Sheet must be filed on completion of the work. | ||