As mentioned on the bombing thread, I do note some lack of consistency with reporting in ‘official’ documents; muddied by the generic use of the term ‘Sterling set’ for airborne wireless, instead of ‘Aircraft Transmitter No 1’ of ‘Type 52A’ set (the latter a naval variant) etc.
The standard modern reference source ‘Wireless for the Warrior’ is rather vague on the development of the Sterling Set but, presumably, there was something ‘official’on the RFC use of wireless, even if the volume much anticipated by the author of the RE history (cited above) does not seem to have been published ?