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).
The specifications and adjustments for a 20 HP Dynamo.
| Identifier | ExFiles\Box 165\6\ img078 | |
| Date | 8th April 1927 | |
| BY/RD Copy. X5661 20 H.{Arthur M. Hanbury - Head Complaints} P. DYNAMO. 28 slot armature + to N found to be 3½° as received. std. + to N is 7½° B angle B angles. Comm: needs retarding 4° to make brush angle 7½° from neut. clockwise on comm: end. 8.4.27. E.F.C. | ||