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How do I build a catapult with HIGH ACCURACY target hit? Answered

I want to build a catapult that will hit exactly 3 meters away in pinpoint ..!!
And later adjusted so as to hit 4 and 5 meter away too..?

7 Replies

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Kiteman (author)2012-11-24

Look into making a trebuchet - you'll be able to adjust the range by altering the size of the counterweight.

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frollard (author)2012-11-20

Most catapults are simple machines - spring driven (of some sort) arm launches a projectile.

If the spring is always pulled the same amount (accounting for wear and tear) - and the projectile is always loaded the same way and always weighs the same, it will always hit the same spot. From there you can calibrate an aiming system.

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bwrussell (author)frollard2012-11-21

If you really want to hit the exact same spot you need to take into account changing atmospheric conditions like humidity, temp, wind, and pressure.

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frollard (author)bwrussell2012-11-21

True, but those details will be very minute when considering a projectile that only goes 3m. The ballistic physics will be orders of magnitude more influential than any aerodynamic considerations (assuming a spherical cow)

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mpilchfamily (author)2012-11-21

Given all the variables your not going to get pin point accuracy. But you will be able to dial it in to hit a general area at the distance you want.

With the short distances you want i suspect this is a cubical war machine right? If so you shouldn't have too much of a problem keeping the projectiles on target.

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rickharris (author)2012-11-20

Do you mean a sling shot? If so the to get accuracy you need to practicable.

If you mean a mechanical catapult eh trebuchet then lots of detail on line. You need consist ant ammunition and power for repeatability

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iceng (author)2012-11-20

Pumpkin Chuckers websites and youtube will give you more engineering and ideas on a method for making a decent one yourself
good building.

A

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