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 test results for 20/25 HP production dynamos.
| Identifier | ExFiles\Box 62\3\ scan0221 | |
| Date | 4th May 1921 | |
| RR 258 (150 BKS.) (DB{Donald Bastow - Suspensions} 461-8-12-24) MP 306975 X6106. ROLLS-ROYCE LTD. INSTRUCTIONS. To H/S 4 May 1921. Order No. Customer's No. 20/25 H.P Production Dynamos We have received three dynamos from Mr Brock of the type now being sent out, namely with the usual 28 slot armatures and trailed poles. From results with these machines we have derived a production test which we give on sheet attached. Also attached is a sheet showing I Curve of the machine hitherto Standard II Average of the three machines from Mr Brock. III Curve of 24 slot machine with trailed poles. The machines from Mr Brock have the control brushes in the same position (Contd) Signed This Sheet must be filed on completion of the work. | ||