Electrically Powered Ultralight Aircraft

On Mon, 6 Aug 2007 20:43:47 -0500, "Maxwell" wrote
in :


"Larry Dighera" wrote in message
.. .

Personally, I'd like to see an electrically powered parachute
(http://skyhighflying.com/homepage.html) design attempted. Surly the
lighter weight would require less power. It would seem that
lithium-ion polymer batteries are a potential enabling technology.


They might be lightweight and strong, but I think they would be far too
inefficent. All the canopies I have been around have had a very poor L/D
when compared to something like a sailplane.

The web site below mentions an L/D of four to one.

I always assumed they were so popular because they were so strong, portable
and quick to set-up. But I'm thinking their fuel mileage would be very poor.

I would be more interested in the specific horsepower required to
operate powered parachutes than their efficiency. This web site
mentions 50 HP to 65 HP:
http://www.all-about-powered-parachutes.com/faq.htm

There is a 14 HP Powered Paraglider (PPG) engine offered he
http://www.poweredparasports.com/Par...#Jet%20Details
They also state that the weight of their engines ranges from 46 lbs.
to 68 lbs.

If a 14 HP electric propulsion system weighing 46 lbs could be
constructed, apparently it would permit the use of PPGs by pilots up
to 180 lbs.