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Step 3Restricting the Flow.
The air is restricted by using channels cut in a layer of polystyrene, capped by a layer of paper.
Using the attached templates, cut pieces from the polystyrene and the paper. If you are doing it by eye, remember that the CD has a diameter of 12cm.
It is easier to glue the polystyrene to the paper, and then both to the CD. Use the "normal" glue to do this, being careful not to clean off any "ooze" before it dries: blobs of glue on the bottom of the hovercraft will catch on the surface below the craft and slow it down or even stop it completely.
Using the attached templates, cut pieces from the polystyrene and the paper. If you are doing it by eye, remember that the CD has a diameter of 12cm.
It is easier to glue the polystyrene to the paper, and then both to the CD. Use the "normal" glue to do this, being careful not to clean off any "ooze" before it dries: blobs of glue on the bottom of the hovercraft will catch on the surface below the craft and slow it down or even stop it completely.
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Quote: "being careful not to clean off any "ooze" before it dries: "
Perhaps this is one reason it would not "fly" as wanted.