Quantity   Component name
1 × LPT Port Controller Kit 8x Relay Outputs Jaycar Cat No: KV3590 - Used for control of Solenoid valves. No longer sold. Could now be replaced by an arduino with relay shield.
1 × Dual Acting Pneumatic Cylinder Approx 150mm travel - for release mechanism
1 × 4-Way Pneumatic Solenoid Valve To suit above cylinder
1 × Irrigation Valve To let the water in to the bottle
1 × 2-Way Solenoid Valve Used to pressurise the bottle prior to launch
1 × Plastic Tool Box To house all the solenoid valves
1 × 300x15mm Irrigation Riser Tube Tube to stick into the bottle and launch from
1 × O-ring Sized to fit around 15mm tube with a groove cut in it. Creates seal with bottle. Can also put double o-ring if required.
1 × Packet of Cable Ties (Medium Sized) Used to make the latching mechanism to hold the bottle while on the launchpad
1 × Old 486 Laptop with LPT port ;) Its hard enough to find a real serial port these days yet alone a LPT port :P