wrote)
If a Cri-Cri were to be set up with electric motors and a battery, how
big (heavy) would the battery need to be to allow the pilot to: Take-off,
fly around for 15 minutes at 100 kts, and land?

Altair has a graph on their Web site that seems to show that their
batteries will give 90 Wh/kg at a 15-minute discharge rate. On the other
hand, that graph also has "Altair's Disruptive Technology" written on it,
which means it was probably produced by salesmen and not engineers. If you
take the 90 Wh/kg at face value, you'd need about 169 lb (77 kg) of
batteries.


This is why I love these groups!!

Thanks for the answer.

Ok, so 170 lbs worth of batteries it is! :-)

I have 50 lbs 'to give' swapping over to electric. So now all I need to do
is find 120 remaining lbs (55 kg) of weight, and shave THAT off the Empty
Weight of the Cri-Cri.

Gotta start somewhere! g


Montblack