#GOATCatapult

%23GOATCatapult

By: Henry Ollivant

Me and my group are making a catapult, 4 wheels, wooden, rope and a bucket as the payload.

http://www.instructables.com/id/How-To-Build-A-Catapult/

Here is a link (AVAILABLE ONLY TO REGISTERED USERS) to the instructions PDF document.

We’re going to need

 

  • 9 – 8′ two-by-four’s
  • 1 – 12′ four-by-four
  • 3 – 8′ four-by-four
  • 50′ of surgical tubing
  • Fiberglass windsurfing pole or a large section of steel pipe (Fiberglass pole preferred)
  • 20′ thick nylon rope
  • 1- 4 ft section of 4″ diameter ABS pipe
  • 1 -4 ft section of 2.5″ diameter ABS pipe
  • 2 – 4″-2.5″ step down ABS adapter
  • T-adapter for ABS pipe
  • ABS cement
  • 2″ X 4′ aluminum pipe
  • “S” hook
  • “U” bolts and nuts
  • Large Eye bolts
  • 12 – 6″ lag bolts
  • 3 – 5″ carriage bolts, nuts, and washers
  • Assorted deck screws (at least 3″ long)

Tools we’re gonna need

  • Chop Saw
  • Reciprocating saw
  • Drill Press
  • Assorted Drill Bits (including large hole-saw or adjustable spade bit)
  • Drill
  • Wrenches
  • Welder (if using steel pole)