udsaxman

Not considering how much juice your blaster pulls and having the alarm go off mid HVZ mission

Dude! use out-runners for the first stage!  Dropping to 2s wont help anything to be honest, i run my outrunner demolisher at 4s.

Good point about the closed cell foam, I hadn't even considered that. The plan was to just use the PVC pipe as the barrel with mylar over the ends. I will need to test this and might have to move to boomco straws if the closed cell foam is a problem. Someone mentioned that rival balls might hold up better so I will be testing those too once I finish hacking together a vacuum pump.
On a related note, turning a dart into foam confetti would definitely be interesting to watch...

I've been a spud gunner for 15 years. Those are pressures though, the goal of this is to evacuate the air from the chamber to avoid having to deal with air resistance. The pressures actually shouldn't be as dangerous since schedule 40 < 2" should be fine from what I've seen at a 27" vacuum which is where I'm going to limit it. I look forwatd to hearing what the other tato pumpkin guys have to say.

 

This is drawing inspiration from and from the Purdue University supersonic project https://youtu.be/YYNCGZCul1Q
 

I looked around a bit and i dont know exactly yet.  I will probably pick up a rapid strike sometime soon and see what can fit in there.