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).
Instruction note regarding a noise nuisance in tested Watford machines and proposed modifications.
| Identifier | ExFiles\Box 70\4\ scan0182 | |
| Date | 29th June 1920 | |
| RR 238 (150 BKS.) (SH57. 29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. Customer's No. 19 the majority of Watford machines that we have tested! Messrs Norths have not thoroughly appreciated our suggestion re enclosing the armature tunnel. The original idea was that the pole piece casting should do this a la{L. A. Archer} B.T.H; at present the mere fitting of a thicker cover plate is not thought to alleviate the noise nuisance appreciably. Signed H.E.W. This Sheet must be filed on completion of the work. | ||