Extract detailing Mr. Royce's specifications for Goshawk I dynamo brushes and carcase dimensions.
| Identifier | ExFiles\Box 50\5\ Scan005 | |
| Date | 1st June 1921 | |
| X4333 Extract from EFC {E. Fowler Clarke - Electrical Engineer} 5/T1.6.21. 2333 4069 X.3945. X.3348. X.3533 - REGOSHAWK(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) I DYNAMO. Mr. Royce fixed up two standard sizes of brushes which we should use, the larger being 1" by 1/4" and the smaller 1/4" by 5/16" in the cross section. He considered that this Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) I dynamo could be provided with brushes of the smaller standard. The carcase of the Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) dynamo he stated should be thinned down to .275" It was left that Mr. Elliott would send through sketches and drawings showing the new dimensions, after which we would send the necessary complete electrical calculations and the expected performance of the machine. MADE AT CROX... EFC. {E. Fowler Clarke - Electrical Engineer} | ||
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).