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The reason they use rudders instead of turning the propeller - the propeller holds a lot of rotary inertia when it is spinning. To turn a spinning propeller puts a lot of stress on the bearings, and might cause your hovercraft to tilt.
Try redirecting some of the lift air flow backwards to create your propulsive force.
I seem to remember some guys from my high school doing that when they built their hovercraft. If you're using a large enough gas motor, you should have power to spare.
I have very few ideas for the skirt. Look at Jackie Chan's Rumble in the Bronx for inspiration, and be sure to wear life jackets.
Good luck!
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...Only a few people are awake and they live in a state of constant total amazement. -JP Shanley, Joe vs. the Volcano
Last edited by Kris Verdeyen : 01-07-2002 at 11:29.
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This year may be one of the first years where there is a drastic difference in Regional level and Championship level strategies that drive robot design. - tim-tim [more] 
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