The mileage testing of various coils on Goshawk engines, concluding with the benefits of an improved design.
| Identifier | ExFiles\Box 172\3\ img068 | |
| Date | 24th July 1923 | |
| contd:- -2- EFC {E. Fowler Clarke - Electrical Engineer} 1/T24.7.23. Coil. TG1. 3714 miles on 7-Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine))-11. TG2. 1618 miles on 3-Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine))-11. 1TG3 466 miles on 4-Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine))-11 and several hundred miles on 5-Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine))-11 at W.W. 2TG3. Several thousand miles on 2-Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine))-11. 3TG3. 683 miles on Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) 1. 5TG3. 5875 miles on 7-Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine))-11. It is therefore considered that we have had sufficient running on the improved coil, considered apart from the material of the case, to be able to say that the improved insulation of the primary and the modified dimensions of the case, represent a distinct improvement when combined with the use of a case made in Stabalite. 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).