Mxsmanic wrote:
Gig 601XL Builder writes:

Now for the guys with "Heavy" experience. Does the 747 really only have
enough onboard battery power to last a little over an hour for the
flight deck?

That's already quite a while. How much battery power would you expect? The
aircraft is designed so that it should never have to get by on battery power
alone.

Well Mr. Aviation, the little 1320# plane I'm building should be able to
run without the alternator charging the battery for about 1.5 hours.