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).
Tests on Goshawk dynamos to reduce noise and improve commutation performance.
| Identifier | ExFiles\Box 51\1\ Scan285 | |
| Date | 27th October 1923 | |
| X4383 To RHC. {R. H. Coverley - Production Engineer} from EFC. {E. Fowler Clarke - Electrical Engineer} c. EP. {G. Eric Platford - Chief Quality Engineer} c. HY. {Tom Haldenby - Plant Engineer} c. HS {Lord Ernest Hives - Chair} /TMW. EFC {E. Fowler Clarke - Electrical Engineer} 2/T27.10.23. X.4383 - RE GOSHAWKAero EngineCodename for 20HP Car / Aero Engine after KestrelAero Engine DYNAMOS. We have now again tried on 5GII dynamo 562 625 fitted with cast iron end bracket, since this has been eased in the bearings by you. Although the noise has not been entirely eliminated this procedure has certainly made a differentt and we are now anxious to see if the same result occurs on dynamo No.562 on 3GII, the bearings of which we have also asked you to ease. Perhaps you will kindly let us know when this has been done. It appears that the cast iron end bracket in itself is definitely not a cure for noisy dynamos, at any rate it certainly has not been in this instance. We have now handed to you dynamo No.161 which you fitted with the new armature with two coils per slot, this dynamot to be fitted to 5GII ready to go to Mr. Royce. The results of this machine as regards output performance are practically identical with the standard. As regards commutation, however, there appears to be a distinct improvement. It will be worth while making up two more armatures like this, which please do. EFC. {E. Fowler Clarke - Electrical Engineer} | ||