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).
Test results of a high output dynamo fitted to a 20 HP car, chassis GLR-50.
| Identifier | ExFiles\Box 62\3\ scan0060 | |
| Date | 9th July 1930 | |
| COPY. EP.{G. Eric Platford - Chief Quality Engineer} LE7/R9.7.30. re. GLR-50. Hopp. 20 H.P. We tested this car, which is fitted with a high output dynamo, and find that with all the headlamps on at 25 m.p.h. there is no discharge. At high speeds there is a discharge of about 4 amps. J.L.E. | ||