CH wrote:
and how long does the battery last?
with the transponder on?

A modern transponder like the Becker or Microaire draws about 600 ma
with an encoder. People report getting 5 and 6 hour flights on a 7
amphour battery, and still plenty of power left.

Australia decided, that planes without a permanent source
of power on board, do not need transponders in mixed
airspace.

I would prefer, that IFR traffic out of airport airspace should
fly higher than the convection height from sunrise to sunset :-)
How's that??
Chris

Aye, and that's the rub: they come down to the airport, don't they? And
the airport airspace doesn't go all the way up to 18000 here in the USA,
but only to about 10,000 or so. And the buggers don't drop down into the
top, but slide in from the side. Can you believe it?

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Eric Greenwell
Washington State
USA