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).
Routine procedure memo for the Standard 20 HP Dynamo.
| Identifier | ExFiles\Box 51\1\ Scan397 | |
| Date | 7th July 1924 | |
| X4383 To CAP. from EFC. {E. Fowler Clarke - Electrical Engineer} To AT. EFC {E. Fowler Clarke - Electrical Engineer} 9/T7.7.24. X.4383 - STANDARD 20 HP. DYNAMO ON THE ROUTINE PROCEDURE. (1) Cold balancing speed for 12.4 volts at 569 r.p.m. 10 volts at 500 r.p.m. and 17 volts at 700 r.p.m. (2) No amperes at balancing speed as above, 8 amperes (14.0 volts) at 776 r.p.m., 14 amperes (15.2 volts) at 966 r.p.m. (3) Angular position of control brush 118° from positive brush. Maximum ampere output as in (5) below. (4) Hot balancing speed for 13.6 volts at 650 r.p.m. 10 volts at r.p.m. and 17 volts at r.p.m. (5) Balancing speed as in (4). Maximum amperes 12.0 at 1570 r.p.m. (6) Balancing speed of 13.6 volts at 652 r.p.m., 10 volts at 555 r.p.m. and 17 volts at 753 r.p.m. (7) Balancing speed as in (6), 8 amperes at 913 r.p.m. 14 amperes at 1202 r.p.m. (8) Balancing speed for 12.4 [13.6 strikethrough] volts at 580 [650 strikethrough] r.p.m., 10 volts at r.p.m. and 17 volts at r.p.m. (9) See FJA's record. (10) Balancing speed at 13.6 volts at 660 r.p.m. Maximum amperes 11.0 at 1600 r.p.m. EFC. {E. Fowler Clarke - Electrical Engineer} | ||