Introduction: The BEST Catapult Ever... Sorta
Here is how to make a very good catapult that throws over 25 yards.
Step 1: Step 1 and 2
build 2x2 square for a base.
Then screw in 2 3 foot base arms for support of the throwing arm
once that is done drill 2 inches above the centor of the base arms with a 1 1/4 inch drill bit
Step 2: Step 3
get another piece of wood that is about 30 inches long
drill a hole directly in the center of the arm with the 1 1/4 inch drill bit
get a hollow pip that is 1 1/4 inches in diameter
Step 3: Step 4
insert the metal pipe through the bases and the arm
next drill 2 U rings on the inside of the square base at the bottom
Step 4: FINAL STEP
get a gatorade bottle cap and hot glue in or super glue it to the top of the throwing arm facing away from the U rings
finally hook up 2 springs to the U rings and the throwing arm
If built correctly the catapult should throw easily over 35 yards
ours was the best in the class and it rocketed a golf ball 46.9 yards
the acceleration of the arm was 308m/s
3 Comments
9 years ago on Introduction
If you want to improve that catapult at all, I would switch to a torsion rope power source. I made a catapult that was 3 feet long, and would launch a golf ball 200+ yards. Also I would use a sling instead of cup
10 years ago on Introduction
what are the list of things you need to make this? like type of wood, or length of metal bar, because i need to build this for class due thursday. Thanks!
12 years ago on Introduction
What happened to the full size pics, and isn't this the same build that was published 18 days ago?
www.instructables.com/id/Dominant-Catapults/
L