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).
Comparing the A.T.4 and A.T.12 dynamos for a small car.
| Identifier | WestWitteringFiles\F\March1921\ Scan43 | |
| Date | 17th March 1921 | |
| 4. Contd. EFCG/T17.3.21. There is also the A.T.4. dynamo which I note only weighs 17 lbs. as against 27 lbs. for the A.T.12.. although its output is catalogued at the same amount, 12 volts 10 amperes, and the cutting-in point is given as 450 in place of 350. You would perhaps like one of these machines to be ordered in connection with the question of the dynamo for the small car. EFC. | ||