Wooden Car Kit

Wooden Car Kit
Item #WK-1

Materials:

1 block of wood with 5 holes
1 rear axle (3/8" diameter)
1 front axle (1/4" diameter)
2 small wheels
2 large wheels
1 peg (1/4" diameter x 1.25" long)
1 peg (1/8" diameter x .5" long)
1 sphere with attached peg
2 elastic bands (1/2" x 2.5" long)
3 elastic bands (1/4" x 3.5" long)

Note: You need to provide sandpaper, white glue, and a hammer.

Car Construction:

1. Sand the edges of the holes that go completely through the wooden block and the two axles (the two longer dowels) until the axles easily turn when inserted into the block. Powdered graphite may help. This can be obtained from soft pencil lead.

2. Place the larger, rear axle through the two holes in the block and attach the two larger wheels. Use the glue sparingly. It may be necessary to use a hammer to gently tap the wheels on. Remember, the wheels must freely turn.

3. Attach in a similar fashion the front wheels to the smaller axle.

4. Use glue to attach the front peg, middle peg with sphere attached, and the small rear axle peg. Allow the glue to dry. It is important that the small rear axle peg be tapped in all the way. Only a small portion should show - just enough to catch the elastic band.

5. Place the two thick elastic bands over the back wheels to serve as tires.

6. Attach the longer, power elastic band over the legs.

Operating the Car:

Turn the back wheels to wind up the elastic band, set on the floor and release.

Things to Try:

1. Does the type of floor covering matter? Wind the elastic band the same way and release the car on a rug and a tile or wooden floor. Measure the distances traveled.

2. How does the number of turns in winding affect the distance traveled?

3. Add weights to the car. How does the addition of weights to the car affect the distance traveled?

4. Try using two or three elastics. How does the number of elastics affect the distance traveled?

5. Use powdered graphite to lubricate the back axle where it turns inside of the wooden block. You can create powdered graphite by rubbing pencil lead against a piece of sandpaper and collecting the powder. This may produce surprising results!

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