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).
Instructions regarding the performance investigation of modified medium and high output 48 coil dynamos.
| Identifier | ExFiles\Box 60\1\ Scan217 | |
| Date | 21th March 1930 | |
| RR 23B (150 BKS.) (DB{Donald Bastow - Suspensions} 431-8.12.24) MP 306975 X6004 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E F C. Order No.: PD 47 Customer's No.: 6004 X.8665 - Medium and High Output 6006. 48 Coil Dynamos. Attached is a sheet of two curves showing the performance of 48 coil dynamo IO.1.M; first as a normal medium output machine, and then as a higher output machine after modification of the poles had been carried out by Mr. Brock. This machine, now the first of the higher output type, was made up of the third of the three new armatures, made for us by the shop, and a standard carcase, end-bracket, etc, obtained from production. The B angle was automatically increased by the polar modification to 21° from 15.5° while, correspondingly, the C angle had to be increased to 132.5° from 130.5°. Having investigated the performance of this machine, we are now in a position to complete the instructions issued in EFC.6/AD5-2-30., by Signed: Cont'd.{John DeLooze - Company Secretary} This Sheet must be filed on completion of the work. | ||