It's the newest thing from RLT.COM Industries, and it's adjustable!
The multi-configurable Science Project Experimenter's Catapult Kit, or S.P.E.C.K.
With multiple axle positions on both the arm and the frame, adjustable counterweight positions, class-1 or class-3 lever catapult configurations, wheels vs. no wheels, cup vs. sling, and much more, this catapult is the most versatile experimental platform available for studying hurling dynamics.
To learn more about this unique machine, visit
http://www.CatapultKits.com/10821