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).
Procedure for dynamo tests.
| Identifier | ExFiles\Box 165\6\ img019 | |
| Date | 12th January 1926 | |
| Y5660 To RJA. from EFC, " CAP. EFC6/T12.1.26. X.294. DYNAMO TESTS. Y5660 Working with the bench chassis system of dynamo and battery wires, distribution box and ammeter :- (1) Observe the minimum possible dynamo speed which will permit :- (a) The main voltage of the system at the distribution board not to rise above 18.0 for each of the four cases of external load conduc-tance of 0, .25, .50 and .75 mho. In each case give also the corresponding m.p.h. road speed. (b) The dynamo field current not to rise above 6.0 in any circumstances on open circuit (no external load). In this case give corresponding main voltage at distribution box. (2) Find the minimum value of the external conductance which will prevent the dynamo terminal voltage rising beyond 18.0 in any circumstances. EFC. | ||