wrote)
Its not the motor, its the batteries...

Basic physics: with hydrocarbon fuels, you haul 1/14 of what it takes
to stay aloft in the fuel tank, the other 13/14 comes out of the air
around you... With electric vehicles, you haul or store ALL (14/14) of
what it takes to stay airborne.


13/14 by volume or by weight?

How much does the 15 minutes of air weigh - that you run through an
(average) rotax engine?

I'm using a 4 gph burn rate = 1 gallon per 15 minutes.
4,000 ft (MSL) ??

1 gallon gasoline weighs approx. ......6 lbs.
15 minutes of air..................................? lbs.

http://www.kodiakbs.com/2intro.htm
Rotax 2-stroke info

http://www.kodiakbs.com/4intro.htm
Rotax 4-stroke info


Montblack