The temporary standardisation of the 40/50 ignition coil for the Goshawk.
| Identifier | ExFiles\Box 49\5\ Scan011 | |
| Date | 17th November 1922 | |
| To By. {R.W. Bailey - Chief Engineer} from EFC. {E. Fowler Clarke - Electrical Engineer} c. EP. {G. Eric Platford - Chief Quality Engineer} c. Wor {Arthur Wormald - General Works Manager} /Mr. Brock. X.4273 - TEMPORARY STANDARDISATION OF 40/50 IGNITION COIL FOR GOSHAWK(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)). The ballast resistance to be used with the 40/50 ignition coil for the Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)), in accordance with recent temporary standardisation sheets, will be unaltered. That is to say, not being itself the subject of standardisation, this will be as previously standard for Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)), viz. containing 25" length of ballast wire. 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).