Switching Batteries Advice?

ContestID67 wrote:
I would like to ask the rec.aviation.soaring community for comments
about their experiences switching between batteries while in flight.

It seems to be common practice to carry two batteries. There is
usually a master switch and then an A/B switch to toggle between the
batteries. The issue is what will a momentary interruption in power,
when you toggle the A/B switch, do to your flight recorder/computer?
Most important is the integrity of your flight log, less importantly is
your task and other flight data.

It's a non-issue for me. I use an EW model D which contains a 9v backup
battery that will run it for about 40 hours. Same applies to my GPS, a
Garmin GPS II+ which always has good batteries in it, so a power outage
can't affect the FR: it doesn't see a power break or a loss of GPS signal.

Another solution, of course, is a capacitor that has enough charge
storage to supply the instruments, etc. for the 10-15mS it takes the
switch to change over.

--
martin@ | Martin Gregorie
gregorie. |
org | Zappa fan & glider pilot