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Model hovercraft from an old CD
A pretty handicraft project for kids on a Sunday
afternoon!
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The basic construction: a PET bottle cap is
glued to an old CD.
The threaded part of a PET bottle is cut off, a balloon
is pulled over the bottleneck. The rim of the cap
can be trimmed a little to make room for the balloon's
lip.
A hole of 4 ... 4,5 mm is drilled into the center
of the cap.
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Filling the balloon is easy: inflate it through
the bottleneck, 1 turn of the neck closes the tubular
end. Then screw the bottleneck into the cap. This
arrangement had one disadvantage: while hovering over
the floor, the balloon bent sideways, acting like a
brake on the floor.
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To prevent the balloon from bending sideways,
we made a paper sleeve.
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Tim, showing another filling technique.
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The finished hovercraft, gliding elegantly and frictionless
over the floor. Nieces Hanna and Flora drive it through
the room. Sorry, no sound available!
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