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We want to build a pumpkin chunkin' launcher from Tesla Coil parts (and maybe some more). We were originally thinking a rail gun would be the closest thing to make it, but from the designs I've seen it would have to be massive to fit a pumpkin.

I also know of electric motors which turn electrical energy to kinetic energy, but I don't see how we could use this could launch a pumpkin.

Are there any other ways to turn Electrical Energy to Kinetic Energy so we can launch a pumpkin?

Could you please let me know how I can make my question more on topic before downvoting?

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    \$\begingroup\$ @laptop2d I thought I showed research by stating my ideas (rail gun and electric motors). How else should I research? \$\endgroup\$ – Seth Kitchen Sep 13 '16 at 19:20
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    \$\begingroup\$ @SethKitchen No, rail guns require high voltage, high current DC. Tesla coils provide high voltage, low current, high frequency Alternating current. They are not related. \$\endgroup\$ – DerStrom8 Sep 13 '16 at 19:24
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    \$\begingroup\$ How else? How to make either of those "ideas" practical. What do they imply in kinetic energy for the pumpkin, what THAT implies for electrical energy - voltages and currents - and what those imply for actually building something. If all you can do is name those "ideas" you haven't STARTED the research. Specs of waht you have won't help - a comparison between those specs and what you need will. \$\endgroup\$ – Brian Drummond Sep 13 '16 at 19:24
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    \$\begingroup\$ This is simply a list request. There's no question to be answered. \$\endgroup\$ – pipe Sep 13 '16 at 19:27
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    \$\begingroup\$ Pull back a spring with a screw thread or other rotary to linear converter. Takes a lot of energy. Car springs or torsion bars may work. Lethal. Wind up a Trebuchet with a winch. That has lots of cool factor. Pump water into a tank in a Trebuchet to make load. Cool!!!!!!. | Compress air. Oh yes!. | 1 kg to 100metres straight up no air needs mgh ~= 1 x 10 x 100 = 1000 J = 1000 Watt seconds. | V = sqrt(2.a.h) = sqrt (2 x 10 x 100) = 45 m/s = 100 mph. Stand clear. Air adds to this. About 120N / 12 kg drag forces at exit for moderate pumpkin. So "rather more" than 100 mph for 100m high. \$\endgroup\$ – Russell McMahon Sep 14 '16 at 1:58
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Use an electric motor to power a compressor to make an air cannon.

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