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 detailing modifications and settings for a 20/25 Dynamo for model 18GIV.
| Identifier | ExFiles\Box 62\3\ scan0055 | |
| Date | 8th July 1930 | |
| Rly 238 (150 BKS.) (OB 461-8-12-24) MP 306975 X6005. ROLLS-ROYCE LTD. INSTRUCTIONS. To: FFC Order No: AD. 61 Customer's No: X Cont Date: 8 July 1930 20/25 Dynamo for 18GIV (1.24s. HC) This machine is the first to incorporate the new die-cast end-plate with fixed control brush. It has the EJB pole modification and 48 coil armature. The main brushes were found to be 11° retarded from neutral whereas a N machine which was electrically similar had a retard of 14°. On machine 1.24s.HC the control brush was spaced about 126° from the positive. This setting gave an output which did not produce the allowable temperature rise and the control brush bolt-holes were therefore filed to permit of some adjustment. Signed: (Cont'd) This Sheet must be filed on completion of the work. | ||