Making an air powered cannon

I want to shoot a projectile fast. That has been my main aim for years: to track the speed of a projectile that I shot, and calculate a speed of over 100mph. Unfortunately, as I live in the UK, I cannot do this with gunpowder, and using butane or gaseous propellant still counts as a firearm after th…

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Making a compact igniter for an engine

I have struggled with the use of sparkplugs in my engines, simply due to their need of a large box of electronics hardware and wiring simply to get a few sparks for ignition. Using a blowtorch to start an engine is much harder than traditionally using a sparkplug, but sometimes the initial set up t…

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