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).
On the performance improvements of Watford magnetos after being fitted with new armatures for an 'H' engine test.
| Identifier | ExFiles\Box 43\4\ Scan308 | |
| Date | 31th October 1930 | |
| X4021. To Rg.{Mr Rowledge} from EFC. " By.{R.W. Bailey - Chief Engineer} c. Mr. Jaques. EFCS/AD31.10.30. X.4021. WATFORD SP.{Mr Spinney}12-2 (IS.12) MAGNETOS NOS. 83119/20. At Messrs. North's request this pair of magnetos (which have been earmarked for the next "H" engine type test) were returned to them for the purpose of fitting to them new and up-to-date armatures with improved winding. These machines have now been received back again and duly bench tested. The performance has been considerably improved by the alteration of winding particularly at low speeds. The low speed performance is now better than similar apparatus of the B.T.H. machines. The machines are available in our laboratory when required for the Type Test. EFC. | ||