Matthias Paul Scholz's

Design study:

Blue Ball Gun

Robots		Created: September 2006
	LDraw file Building instructions	For the Dicke Bertha Typ II robot, I needed a device that was able to throw the blue ball contained in the NXT kit without using elastic non-LEGO parts. The propelling mechanism has been inspired by the Zambor shooter of LEGO's Bionicle Piraka series.
		Blue Ball Gun