I saw some guys knock up a really effective air compresser the other day on the telly - you know one of those shows where the have to build from
scrap.
They used a small 2 stroke engine (think it was from a strimmer or a lawnmower) and a larger motorcycle engine (250cc?) to power it. They knocked up
a one way valve from a piece of tubing and a ball bearing, fixed that where the exhaust went on the smaller engine, the compressed air outlet was
where the spark plug was (already conveniently threaded of course) and the motorcycle supplied the drive.
Just thought I'd mention that one... you could even make that human powered, swap the motorcycle engine for some peddles maybe...
[edit on 13/1/2009 by Now_Then]

