Hand-drawn technical sketch of an air-powered launcher made from a milk jug and plastic bottles with labels pointing to each part.

A technical hand-drawn style sketch of a plastic air-powered launcher using only a 4-liter milk jug for compressed air. The milk jug is stepped on directly with one foot to generate air pressure, which is delivered through a plastic air tube to a large plastic bottle angled at 45 degrees, serving as the launcher. Inside the launcher is a symmetrical projectile made from two small 200ml plastic bottles joined together front-to-back. The projectile has stabilizing plastic fins at the rear. The entire system is made only of repurposed plastic materials. No mechanical foot pump or metal parts are used. Show a side view with labels for each part: 'Milk Jug', 'Air Tube', 'Launcher Bottle', 'Projectile', 'Fins'. See more