My advise, Definately find out where VFR conditions exist in relationship
to your route PRIOR to taking off and highlighting the area on the LE chart.
At least you'll which way to turn. I put together a backup electrical
system.
Small 12 volt battery..16.00
Small padded bag.........3.00
Lighter jack parts, female, male, fuses etc...
I can power up a hand held GPS, handheld radio etc...
You still have to fly the plane first, but you can talk, ya know where you
are, and you can get the hell out of the situation. The battery will power
both for hours. I have a male to male that could backfeed power to the
xponder is some AC to at least squawk the 7600,7700 or what ever the case
may be.
Chris Grotewohl
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http://irish5string.homestead.com/chrisG.html
http://home.kc.rr.com/grotewohl/CFI.html