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 a 28 Slot Dynamo on General Specification.
| Identifier | ExFiles\Box 165\6\ img111 | |
| Date | 31th December 1927 | |
| ROLLS-ROYCE LTD. INSTRUCTIONS. To: EFC Order No. AE 97. Customer's No. X 5660 28 Slot Dynamo on General Specification Dynamo 1337 with 28 slot armature having a main brush position of 7° retard and a control spacing from the positive brush of 121° has been put through the specification of 15-11-26. The above angles have been adopted as standard for this type of 20 h/s machine. Item 1. Temperatures were 15°c ambient. 43°c rise making 58°c total. Item 2. At 640 rpm the O/C volts were 12.2. The speed for 14.0 volts was 695 rpm. Item 3. See curves. There is a loss of 70 rpm. Signed This Sheet must be filed on completion of the work. RR 238 (100 BKS) (SH57:29-e-20.) MP 224356 X 5660 | ||