I think that the end was flared because otherwise the pvc rocket would be tilted in the barrel due to the larger diameter of the end cap as compared to the pipe. if I use the nose cone I will have a similar problem with the flair instead of the end cap. I think I will end up using the spring loaded ...

I’m more referring to the type you could get from Estes. As for the pvc rockets (assuming you mean the type demoed by spudtech), maybe you could replace the end cap with a nose cone?

A friend and I are having a 2 week build off to a range competition, reading through the forms I found many people suggesting darts or golf balls. Well I have a 1in barrel and can’t fit a golf ball so... maybe a model rocket with spring loaded fins would work. It can be easily made for the most part...

Thanks, it is nice to see someone that dosent freakout at the mention of electronics

I agree with POLAND_SPUD about electronics. While they'd work (indeed, I considered them for a design a while back), it's much simpler to use air valves. An air cylinder and a QEV/sprinkler valve can both be worked with a simple directional control valve. And you can use a 3-way valve--just make th...

very good canon poland. I’m going with the electronics because I work well with them, and something that uses the recoil to push the bolt back might not work with nerf darts :P it would need 3.5 in of movement to allow the dart to pass. and I might be able to achieve full auto by having timer B in a...

the sprinkler valve has something called a solenoid. this is a spring loaded plunger that is pulled up by a electro magnet, it is like a electric pilot valve. when the plunger is pulled up a small leak of air pulls a rubber diaphragm up, and in doing so it creates a larger opening to allow air to pa...

Looking around I have seen many wonderfully complex mechanical answers to the semi auto problem in spudding. After having several nerf wars with friends I have decided to make my own solution that I think would work best. It electronically actuates the sprinkler valve and a piston connected to the b...

wait am i goanna need a bumper?
if so will a pice of foam work?

ok here is the updated plans, i hope to make the body tube removeable to service the launcher if it is nesscary with a pistion

thank you, how much movment should i allow for it?

would this piston work?

would it be easier and peform better to make it a piston insted? somthing like an end cap with a rubber disk , bolt washer and a nut. put a couple of holes in the endcap for airflow. here

im attempting to find online sources for pvc pipes because my 3 local hardware stores dont have any 3in pipe that can take pressure. any suggestions?

im sorry this is very noobish, but what is a union?
nm just looked it up on the wiki. good idia