Zippy

Motors:	Three 6v Speed 280 model airplane motors
Props:	Thrust: 6x3; Lift: 5x4
Power:	8-cell AA NiCad, 9.6 v (yeah, I'm running it a bit hot)
Control:	Forward/reverse remote control for left and right thrust motors
Weight w/o battery:	18 ounces
Weight with battery and counterweight:	26 ounces
Thrust, 9.6v battery	9 ounces
Acceleration:	11 ft/sec²
Top speed:	Unknown -- it won't go in a straight line long enough. But it's probably about 20 ft/sec

Anna contributed the pilot. He looks a little uncomfortable sitting there with his legs straight out, but at least he doesn't get hot with the 100mph wind blowing on him... The cover wedges under the thrust ducts and the rear is held down with a rubber band.

The electronics are swiped from that radio-controlled car. The wires to the battery, motors, etc are buried in the foam. (Just cut a slit and press them in!)

Note how part of the lift air is directed into the skirt to inflate it.

Is that really just a couple of nickles you pressed into the side of the hovercraft to balance it?

It spins like a top, but how can I get it to go straight? Maybe a rudder will help point it forward when its moving, and slow down the turn rate...

A happy afternoon of driving zippy around the driveway. Make that a happy five minutes; then the battery dies.

Data.

The lift motor, with a 5x4 prop, draws 6.1v on a 9.5 watt power supply. There's enough lift to handle 32 oz comfortably and 48 ounces basically makes the skirt touch the ground all the way around without deforming.
Each thrust motor, with a 6x4 prop, draws 5.8v on a 9.5 watt power supply.
On the 8-AA nicad pack, voltage drops to 8.9v with lift motor only, 7.6 volts with lift and both thrust motors.
On a 6-A nicad pack, voltage drops to 6.5v with lift only, 5.6v with all three motors spinning.