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).
Batch of 25 machines, comparing their commutation to a 29 slot 57 segment type.
| Identifier | ExFiles\Box 165\6\ img106 | |
| Date | 29th June 1920 | |
| RR 238 (150 BKS) (SH97.29-6-20.) MP 224355 ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. Customer's No. 5 19 have been considered good. A batch of 25 such machines has been made by production dept and fitted to chassis. All have been considered satisfactory. Commutation of these machines appears no different from that of the 29 slot 57 segment type and in other respects no distinction is noticeable. Signed HR This Sheet must be filed on completion of the work. | ||