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).
Specifications for the production inspection and testing of 20 HP and 40/50 HP dynamos.
| Identifier | ExFiles\Box 165\6\ img185 | |
| Date | 30th January 1929 | |
| X5661 EFC1/T30.1.29. X581d To BM. from EFC. c. Mr. Brock. 20 HP. & 40/50 HP. DYNAMO SPECIFICATIONS OF PRODUCTION INSPECTION & TEST It will be remembered that when we changed to a 28 slot armature on the 20 H.P., we did not issue a new specification of production inspection and test, but issued a covering sheet EFC2/T30.8.27. To put the matter in order we now issue such a specification (copy herewith). You have now received the following specifications:- (all of which refer to dynamos with 28 slot armatures) (1) RR. standard 20 H.P. 28 slot dynamo as above. (2) " 20 H.P. standard higher output dynamo. EFC1/T15.11.28. (3) " Phantom dynamo of the N.B. type dated 19.12.28. This is also applicable to normal S.S. dynamos whose rotation is opposite. A slight modification to this specification will shortly be issued. (4) " Phantom dynamo of the higher output N.B. type, dated 4.12.28. EFC. | ||