| How do you build a machine that throws an airplane made of wood and paper at the same speed?

How do you build a machine that throws an airplane made of wood and paper at the same speed?

sinergistic_ray asked:


this is a model airplane for a science project. It is about a foot long and is light weight. Do you guys have any ideas?
the same speed each time it throws the plane?

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Comments

3 Responses to “How do you build a machine that throws an airplane made of wood and paper at the same speed?”

  1. Phil C on June 4th, 2009 8:02 am

    use a catapult with a constant weight

  2. Wupadoo on June 5th, 2009 6:16 pm

    All you need is a ruler, and a rubber band. Just attach a hook to the front of the planes, attach the rubber band to one end of the ruler, hook the rubber band to the hook on the plane, and pull back on the planes, to an even mark on the ruler…..say the 10 in. mark. As long as the rubber band has equal tension each time, the speed should be constant.

  3. Bomba on June 8th, 2009 12:05 am

    A spring or weight activated launch arm will work better than rubber bands because they stretch and deform.
    Use tare weights attached to the mounting position where each plane is placed. Adjust the total weight of each plane plus tare so the effective launch weights are the same. Start with weighing all the planes. The heaviest will need no tare weight.