On Nov 3, 10:45*am, Peter Purdie wrote:
Since there is no certification standard for electronic variometers, they
can't be certified. *This would be a problem if the statement below was
true, fortunately it isn't.

Only instruments required by the type certificate (normally ASI, Altimeter
and Magnetic compass) must be certified, others must be installed in a safe
manner and the installation signed for by an approved engineer.

It is true that some CAA inspectors pre-EASA certification tried to insist
on self launching gliders to have only Form 1/FAA8130-3 equipment fitted,
but sense eventually prevailed.



In addition gliders come under the aegis of EASA (in the EU) which
means that new instruments have to be certified, though whatever was
fitted when the glider was transitioned in was accepted.

OK, so certification isn't a problem.

What about total energy compensation?