I used this straight edge and Sharpie to draw the lines on this
sheet of 0.7 mil thick plastic.
The smallest octagon is the same size as the bottom deck
— 16 inches across. The next octagon is 2-1/2 inches larger
in diameter (1-1/4 inches larger in radius) and marks where
the skirt will tape to the edge of the bottom deck. The last
and largest octagon is 2-1/2 inches larger still and is the
edge of the skirt. You’ll cut the skirt out on this line.
draw the outline of the bottom
deck onto the plastic drop cloth; it’s
16 inches across. The drop cloth
comes in a huge amount, so cut off
a hunk of the stuff first. Since the
bottom deck is 16 inches wide and
you’ll need to add a border to the
skirt, cut off a piece of plastic that’s
two feet square. You’re going to
have enough plastic drop cloth left
over to make a fleet of HoverBots.
Lay the plastic on a flat surface
and place the HoverBot’s bottom
deck over the center of the skirt
material. Use a Sharpie to draw the
outline of the octagonal-shaped
bottom deck. Draw neatly; you
want the skirt to be as symmetrical
as possible and you’re going to
build up the skirt’s outlines from
this first octagon you’re drawing.
Don’t cut the skirt out yet! You still need to add
additional width to the octagon in order for the skirt to
billow. I used my straight edge to draw a 1-1/4 inch wide
border around the octagon. Why a 1-1/4 inch border
around the octagon for the billow? That’s because 1-1/4
inches is the width of my straight edge. You may want to
experiment with adding different border widths for the
billow (remember, you have skirt material left over for
This photograph was from an early test of the HoverBot; the riser bolts had not been
added to the bottom deck when the skirt’s first octagon was drawn. However, you’ll
draw the outline of the bottom deck onto the 0.7 mil plastic while the riser bolts are
attached to the bottom deck.
an Exacto knife. Then when you get back, separate the top
and bottom decks of the HoverBot. You’ll only need the
bottom deck to make the skirt. You’ll use the top deck later
when you mount the drive fans.
Making the Skirt
Find a large surface to work on because you’ll need to
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