View Single Post
  #2  
Old July 2nd 09, 07:57 PM posted to rec.aviation.soaring
Darryl Ramm
external usenet poster
 
Posts: 2,403
Default Battery life when running a transponder

On Jul 2, 11:30*am, Tony Condon
wrote:
Ive got a Garmin 320 with ACK 30 encoder that is ready to go in the
Cherokee. *Perhaps tonight I will be able to get everything wired up and
check the current draw. *Im expecting about 1.5 amps between the
transponder and encoder. *That will drain my battery moderately fast, but
my "long" flights tend to only be about 3 or 4 hours anyway.

-Tony Condon
Cherokee II N373Y


Remember measurement will be affected by the radar interrogation rate.
If it is not being interrogated on the ground you'll measure a lower
power draw than in practice.

Your excuse in future can be you had to land becasue the battery for
your transponder was going flat :-)

Darryl