The condition of E.G.2 brushes from a Goshawk R.3 dynamo after testing.
| Identifier | ExFiles\Box 50\5\ Scan322 | |
| Date | 21th June 1924 | |
| RR 238 (150 BKS.) (BH57. 29-6-20.) MP 224358 X4333 PB102 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.F.B. Order No.: W.A. 49 Customer's No.: X 4333 E.G.2 Brushes off Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) Dynamo R.3. These brushes have run, in addition to the mileage on 7G1 (See AB102) a considerable time on the bench. The condition of the brushes after removal is fairly satisfactory, <strikethrough>being as follows</strikethrough> The negative is well polished all over, the control is fairly well polished with a characteristic brightness at the leading edge, and the positive is fairly well polished with the exception of a slight dulness at the trailing edge. The commutator is very fair. Signed: Bould This Sheet must be filed on completion of the work. | ||
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).