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).
The Goshawk II engine's ignition system and its safety gap feature.
| Identifier | ExFiles\Box 54\5\ Scan193 | |
| Date | 10th April 1922 | |
| To Hs. {Lord Ernest Hives - Chair} (Le CanadelHenry Royce's French residence) & EP {G. Eric Platford - Chief Quality Engineer} c. to Cl. c. to Wor. {Arthur Wormald - General Works Manager} c. to By. {R.W. Bailey - Chief Engineer} c. to EFC. {E. Fowler Clarke - Electrical Engineer} X3485 E6/M10.4.22. X.4357. GOSHAWK II. IGNITION. X.3485. With reference to the remarks on page 3 of report EP {G. Eric Platford - Chief Quality Engineer} 5/H5.4.22., giving Mr. Hives notes from Le CanadelHenry Royce's French residence dated the 30th March 1922, would you kindly note that it is intended that the spark shall jump from the high tension rotor to the edge of the spigot formed on the aluminium casting of the tower for the high tension distributor. When subjected to an undue external resistance this is the safety gap for the system and no alteration should be made to the height of the spigot in consequence unless the safety gap be provided for in some other way. E. {Mr Elliott - Chief Engineer} | ||