Hi,

The AUW is 17.5 oz. Actually 18 since I added a buzzer circuit to alert me with the Li-Po cells get too low since my Hacker 18-3 controller does not have a programmable cut-out voltage appropriate to these batteries. As for the flight time, I'm not sure. This morning I had to land at 18 minutes to make it to work on time. The plane was still able to accellerate vertically so as far as I can tell it will fly forever. At half throttle it draws 10 amps and I don't usually go beyond that. If I average 7 amps out of a 2.1 amp-hour battery that works out to about 20 minutes though. Here is a picture of the battery installation. I ran some 1/16" bamboo skewers through the foam to give the rubber bands something to hook on to and there is velcro between the battery and the underside of the plane. It really is not slick looking but it flys great.

Steve