On Jan 19, 1:18*pm, Chris Reed wrote:
Second, installation can only be done, as I understand it, if either (a)
the manufacture has issued an approved scheme for installation (I
believe none have, other than for motor gliders), or (b) if you pay an
installer to produce a formal modification scheme (fees) and then pay
our CAA substantial "major modification" fees to have the scheme approved..

Lange gliders have transponder antenna mount built-in, and
most are delivered with antenna and wiring installed with
transponder... Includes Antares 18 pure glider...