I was hoping to get some input from you jsr. If you plan on using 500 psi, I would be looking at stronger construction. Also, why not burst disk cartridges? Easier and cheaper to make, lighter, faster opening time, zero flow restriction and air volume. No brainer in my view I mentioned the 500 psi t...

I have an idea for a large artillery field piece. I am reaching out for help from the community because I have ran hundreds of simulations in GGDT and the best I have been able to get from my current design has been about 800 feet at 500 psig. Ideally, range should be about 600-700 yards, using pre-...

I am using a vortex howler, which is a bit bigger than the barrel ID. My barrel is longer than the original design, which had a chamber approx. 14 in long of 3 in PVC. I tested the lithium on the football and it had no effect on the strength of it. Lubed the barrel well and got approx. 175 feet from...

i thought about silicone, but pure silicon oil is expensive, and the spray kind at walmart has petroleum products and eats plastic. I would also like to avoid cutting the football, because it would not be a standard part anymore. A friend of mine mentioned grease might work better than oil, because ...

I've been working on a launcher on and off for a while, and I've finally got it finished and tested it today. Nerf vortex would not leave barrel at 50 or 70 psi. I did not have a chance to experiment more. I think if I lubricated the barrel, it would lower the friction between the barrel and the vor...

My standard HSLD rifleman (AT gunner when my launcher is done :evil2: :P) kit is my TM AUG A2 carbine with an M4 length Prometheus tightbore barrel, and CQB outer barrel. It shoots a solid 360, good for field ops or MOUT. My optics are an EOtech 552 clone with a QD 3X magnifier. (8 mid-cap mags) My ...

Myself being a milsim airsoft player, I would hate someone shooting paint-anything around. You can throw your camies (camo uniform for those that don't know) into the washing machine, but its hard to get paint, even water washable, out of MOLLE webbing and pouches. My area's rules are that ammunitio...

I sent a pm to one of the area's admins, and have yet to receive a response, but changing the muzzle velocity to suit regulations shouldn't be hard, because I could increase or decrease the pressure when I refill the casing. I think I see what you are getting at, but I want to put some of that expan...

I will primarily firing those finned nerf howler footballs, as per my area's AT weapon regulations. The leads will only go an inch or two before passing through the barrel walls, and the rocket fins are about five inches long. The leads will also be secured to the inside of the barrel using some typ...

Here is my idea for the triggered burst disk. The Nichrome wire will be held to the mylar disk with duct tape, and the wire will be connected to the rest of the circuit using quick disconnects. The disconnects give a more rigid structure for easier connection.

Do you mean it wouldn't be necessary to cast the epoxy, or it wouldn't be necessary to inlet the brass tubes?

To inlet the brass tubes, you drilled out a hole and pushed the tubes in, right? and how big are those tubes? also, I plan to use a 2" union, so do you think running the wire straight across would allow a reliable, uniform rupture? I would like to thank you guys for all of your help. I am going to g...

Yeah, just got a reply from the admin. nothing combustible. so that leaves pressurized air. In the wire burst disk, does the wire break when the disk ruptures? and at approximately what psi does mylar rupture? I used trial and error in GGDT to approximate the minimum PSI for my barrel to about 87 PS...

I like the idea of the triggered burst disk. An electrical trigger for the burst disk would be perfect for this launcher. I looked into the resistance heating wire the spudding handbook talked about, but I would like to avoid ordering it online. Is there a better alternative, or at least somewhere t...

No, not regularly at least.

I would like for the casings to have a fairly self-contained propulsion system. perhaps the casings could be pre-pressurized and the tank would push the pressure over a burst disk's threshold like in the attached image?