Thanks everyone for the replies! Could you tell us a bit about what you want to achieve with the project? Maximum performance, repeatability in terms of accuracy or range, semi-automatic fire? I would prioritize power, repeatability, and accuracy. I really like the idea of being able to hit a target...

Hi, Alright first post here. If this post is not right place I apologize. So I am planning on building a cannon for a physics final project utilizing a 2.5" Mecair VEM220 Dust Collector diaphragm valve and a 2.5" barrel for tennis balls. I found the Mecair valve after many hours of searching when I ...