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 report on a noisy 20-HP Dynamo No. 603A after fitting a new end bracket.
| Identifier | ExFiles\Box 51\1\ Scan292 | |
| Date | 31th October 1923 | |
| X4383 c. EFC. {E. Fowler Clarke - Electrical Engineer} [struck through] c. SPH for Mr. Brock. [struck through] EP {G. Eric Platford - Chief Quality Engineer} 35/H31.10.23. re. 20-HP DYNAMO NOISE. V4688 [struck through] X4383 I have just been testing Dynamo No. 603A on a chassis on test. This dynamo was originally returned as being very noisy and has now been fixed up with a new cast iron end bracket, as suggested by you some time ago. The noise of this dynamo is certainly improved. There is still, however, a certain amount of "hum" when charging, which can be cured by the temporary resting of a weight on the end bracket. I should like to try a few more dynamos which we have complained of being noisy and which have received similar treatment and see whether this experience is confirmed. The matter is urgent. EP. {G. Eric Platford - Chief Quality Engineer} | ||