This are valves http://www.pneumax.ru/upload/iblock/9e1 ... 7f2ea4.pdf
How about this? And what to use as a pilot-trigger valve? Slide valve? If so how do I attach it?

http://i003.radikal.ru/1112/5b/69e7a3ca6ec0.jpg Barrel is 1.9 cm by 110 cm. Firing Volume is 1.9cm * 25cm. About 75 cm3 as GGDT predicts. Is 1.9X25cm enough to shoot at 10bar? And is there any more ergonomical design? Which trigger valve would be the best option? I heard about slide valves, but I d...

I'm thinking of using an ignition coil and 9V battery. Something like 30KV igniter i saw on ultimate spudgun. If not spark plugs, then what would you advice to put into the chamber? Screws? Should I place fan alongside the chamber, or horizontally? Can I use a valve for ventilation? I suspect that o...

http://img215.imageshack.us/img215/7725/designv1.jpg This is about what I want to build. My goal is to build reliable and safe cannon. Thus, I moved the chamber back, that even if it explodes, it will happen behind, not in your face. All pipes are rated to 360psi 95C. For this reasons I decided to ...

Well. I'm going to stick with the left, although it looks strange. My previous cannons suffered from use of Piezoelectric ignitors and a hairspray. I changed Piezo to Tescoma Uno electronic gas lighter. It performed better, but still left a lot to be desired. Which ignition option is going to be the...

You are absolutely right :) So, direct injection with a propane meter is not an option for small cannons, right? And multi spark ignition, or one spark is enough? Fan? Or in a 20cm chamber it is going to be destroyed? The best would be to keep to the 1.2 ratio? Higher ratio will only decrease perfor...

Hello. I've built 3 cannons. This one has been my first. http://s004.radikal.ru/i205/1104/53/97f616715266.jpg Other are not with me now. After reading through all technical aspects of building a spud gun, I realized that I must have been VERY lucky, that all of that cannons actually worked. Now, to ...