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Punkin chunkin or pumpkin chucking is the sport of hurling a pumpkin solely by mechanical means for distance. The devices used include slingshots, catapults, centrifugals, trebuchets, and pneumatic (air) cannons .
Catapult, rocket or jetpack, anything goes as serious competitors try to hurl pumpkins through the air.From: AMERICA WILD AND WACKY: Punkins and Road Killhtt...
- 3 min
- 476.9K
- Smithsonian Channel
For 25 years, Punkin Chunkin has hit the skies. This year, Science Channel is honoring the backyard engineers who turn pumpkins into projectiles with an insi...
- Air Cannon
- Catapult
- Torsion
- Centrifugal
- Trebuchet
Any machine using compressed air to launch a pumpkin is called an air cannon. Air is compressed into a tank. When the constraint holding that air is removed, air expands back to its normal volume. The result is released air acts like a spring and forces the pumpkin through the tube at great volume, expelling the pumpkin out.
A machine using stretched springs or rubber bands, which store energy. When the springs or bands are pulled and then released, the stored up energy is transferred to the arm of the device, which hurls the pumpkin.
A Torsion machine is any device that uses twisted rope as its primary source of power. It relies on a rope that works by torsion or twisting. The rope stores mechanical energywhen it is twisted. The amount of force it releases is proportional to the amount it is twisted.
Any machine with an arm that spins at least 360 degrees to launch a pumpkin. The basic idea in a centrifugal is to accelerate a pumpkin by spinning it in a circle many times, with each rotation gaining more and more momentum until it can build up enough energy to propel the pumpkin forward.
The basic idea of a trebuchet is to transform the potential energy stored in the lifted heavy mass into the kinetic energy that is the motion of the smaller mass (the pumpkin). It uses a short arm, which is weighted down with a heavy object to counterbalance against the long arm, where the projectile (the pumpkin) is placed. When the heavy mass of ...
Watch Punkin Chunkin this Thanksgiving, November 22nd, at 8 pm on Science Channel.More pumpkin carnage online at ScienceChannel.com/chunk"Punkin Chunkin" is ...
- 4 min
- 402.5K
- SciShow
