Pneumatic tennis ball launcher – Potato Gun, spud cannon…

Jenny writes –

“A Spud Cannon that can shoot tennis balls through plywood! I’m soo awestruck and want to make one!” – Link.

Related:

• Make a Spud Gun Instructions and 3D PDF – Link.
• Make a Spud Gun – Weekend Projects: A Make Magazine … – Link.
• The SGTC Mega-Launcher Spudgun – Link.
• DIY Spud gun remix… – Link.
• Made – Spud gun – Link.