Cheers,

Thanks for all the info; you've certainly given me food for thought.

I forgot to mention that the first part of the task is to build a tracked vehicle to carry the gun on and so we'll be using some form of engine driven compressor to feed the gun; combustion is not permitted.

The gun ...

Hi,

I've been given the task of building a pneumatic gun / cannon capable of firing a 75mm diameter tin (weight roughly 450g) and hitting a target with some degree of accuracy 50m away. The pressure will be limited to 147 psi.

Rather than trying to re-invent the wheel, I was wondering if anyone ...