
according to GGDT the muzzle velocity of a cluster of 30 Nerf darts with wadding should be around 100fps which is a decent speed for nerf darts, and I've tested this with a bundled sock which gets ranges of ~100feet at a semi flat angle to the ground.

for comparison this an early prototype of an AT4

originally I planned on piloting this with a hose and a blowgun on the side but that was too optimistic even with an oring seal on my piston

instead I opted to directly mount a 1/4" ball valve triggered opened via a string which works great

I'm pretty happy with it, it has as much power as I need and I can finaly bring a cannon with me to college and shoot it too