After a few nights of work, I had a hovercraft I was proud of. Beautifully crafted from plywood, a 2×4, and Visqueen, I was certain it would provide hours of hovering enjoyment.
Hah.
My test versions worked perfectly. I figured that the physics would scale up, and all would be great. Turns out, propellers don’t scale up. While the small versions would use the prop to hold air in the skirt, my 2-foot prop would simply let the pressure come right back out between the blades. This could be because the larger prop spins slower….. but nonetheless, it’s back to a leaf blower until I work this out.
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