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).
Requesting a written report on the success of a 28-slot armature in improving the silence of a 20 HP Dynamo.
| Identifier | ExFiles\Box 165\6\ img073 | |
| Date | 23th April 1927 | |
| To Mx.{John H Maddocks - Chief Proving Officer} from EFC. X5661 EFC2/T23.4.27 20 HP. DYNAMO: ARMATURE WITH 28 SLOTS. We have had a report from you of the first of these machines submitted to you, viz. Mx{John H Maddocks - Chief Proving Officer}3/T29.12.26. Since that time two other dynamos with 28 slot armatures have been submitted to you and we have had verbal reports from your Mr. Daykin as to the success of this feature in improving the silence of the machine, but I should like to have from you a written report to this effects and shall be obliged if you will also address copies to those interested. EFC. | ||