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 and electrical specifications for two shunt dynamos for the 20/25 HP Chassis.
| Identifier | ExFiles\Box 62\3\ scan0341 | |
| Date | 17th March 1933 | |
| 86037 Hs{Lord Ernest Hives - Chair}/Wst. C.E. BY/RD3/W.17.3.33. 20/25 H.P.Chassis : Dynamo. We have issued instructions to RHC.{R. H. Coverley - Production Engineer} to produce two shunt dynamos in accordance with R.R.Scheme 344. The electrical particulars are as follows :- Armature : 3.075 diameter, 3.125 longer. 12 conductors per slot of 17 SWG.wire. Commutator : Longer to permit larger sectional area of brushes. Brushes material - Morganite E.G.O. Field Winding : 216 turns of 20 SWG., .036 dia. wire. The foregoing was arranged in our discussion on this subject. BY/RD. | ||