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I.
Overview of the body
II. How
to make beams and bars
Prepare
following length straws. You need 7 flexible plastic drinking straws
and four flexible parts of straws to make spacers.
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4.5cm straw (4 pieces)
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12.0cm straw (1 piece)
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14.5cm straw (2 pieces)
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15.0cm straw (4 pieces)
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Cut and bend
straws along the drawings below.
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1.
Make a transverse slit
in the middle of the 4.5cm straws. Cut the straws about 70% of its
diameter.
2.
Make a longitudinal
slit on each arm of the 4.5cm straws. Do not make slit edge to edge, leave
2mm.
3.
Make two transverse
slits 3cm apart from the edge of the 12cm straw
4.
Make two transverse
slits 3cm apart from the edge of a 15cm straw.
5.
Make a transverse
slit 2cm apart from the edge of two 15cm straws.
6.
Make a slit in the
middle of a 15cm straw.
7.
Use 14.5cm straws
as lower beams.
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III. Body
assembly
When you assemble the body, insert the
longitudinally slit parts into proper straws as the following drawing
shows. If it is difficult to
insert the slit parts, make the slit deeper. After you make a proper symmetrical
body you can apply very small amount of super glue on apices of straws but do
not drop glue in the front bar and the rear bar.
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1. Insert joints into the
upper holes of rear upper beams
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2. Insert the free arms of
the joints connected to the rear upper beams into the free ends of the
front upper beams
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3. Insert the short arms of
the front upper beams into the lower beams
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4. Insert jointsf arms into
free ends of the lower beams and free ends of the rear upper beams.
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5. Insert slit ends of
front bar into the ends of front upper beams.
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6. Insert slit ends of rear
bar into the lower beams.
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IV Engine unit
Prepare following items
A plastic straw
A plastic propeller (cut from square cross
section plastic bottle, check the shape in the pictures)
A bead, a plastic disc, a paper clip, two
rubber bands,
5cm bamboo stick, copper wire or string
A pair of
compasses and a piece of wood
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1. Make a hole with compass
needle in the middle of the propeller.
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2. Insert hook like clip
wire into the plastic disc and the bead.
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3. Bend the wire like the
picture above.
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4. Make a hole on the
propeller and insert the free end of the wire.
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5. Bend the free end of the
wire like the pictures and fix the wire on the propeller.
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6. Prepare the straw,
rubber bands and a bamboo stick.
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7. Make two V shape cut on
an end of the straw.
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8. Hook rubber bands with
the wire and pass in the straw.
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9. Fix the rubber band with
the bamboo stick.
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V Final
assembly
Fix
the engine unit with strips of insulation tape.
Make
wheels from your daily items such as plastic bottle lids and corks and paper
boards.
Hold
the upper part of the engine straw with your left hand and wind up the rubber
bands by rotating the propeller clockwise with your right forefinger. Put the
vehicle gently on a flat floor and release the propeller.
gRubber band propelled wind
vehicleh copyright JICA Senior Volunteer Hideo
Nakano (September 2007)
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