24 replies to this topic

[roboman]

Rather than reviving the 364-day old thread on these, I figured I'd just start a new one.

I finally got around to working on the aluminum 2K tanks again, and this time, I got a prototype to work. As far as I can tell, there are no leaks, but I'm waiting for the epoxy to cure completely before I try using a higher pressure.

Pictures:


As you can see, the epoxy got a little smudged in a few areas, so it's not as good-looking as it could be, but it's just a prototype. The final version will be threaded.


The hose barb is also epoxied in. This will most likely not change. The plug that holds the O-ring in is delrin instead of aluminum in this version, simply because I was out of aluminum. This forced me to run a bead of CA glue around the edge of the plug, since there was a slight leak. The white stuff around the stem on the back is overspray from the CA activator I used. I'm pretty sure it will wash off.


I used a faucet washer rather than an O-ring to seal the front end of the valve this time. It has not given me any issues whatsoever.

I posted a video of it on Youtube for your viewing pleasure.

[Kid Flash]

Looks pretty cool. Glad you got it work!

[ChaosPropel]

Very nice! If these work, will you be selling them?

[WicketTheModder619]

Very cool! I remember when you first started working on these and seeing the early prototypes. You have come a long way from the earlier model. I would also be interested if you are going to sell these.

[blitz]

That is really cool. I like it.


Just curious, why didn't you use a barb instead of a twist quick release tubing coupler?

[roboman]

That is really cool. I like it.


Just curious, why didn't you use a barb instead of a twist quick release tubing coupler?

I didn't use a quick-disconnect because there was no space for one. Also, almost all Nerf tubing works well with 1/8" barbs, but certain guns have tubing that is too large to fit in a normal 1/4" quick disconnect. Also, hose barbs are cheap.

Yes, I will be selling these fairly soon. They will be $20 each, plus shipping.

[meatballica]

Do these fit in the space where the stock Air Tech 200o airtank was? I'm guessing they do but you'd know for sure.

[Ozymandias]

Do these fit in the space where the stock Air Tech 200o airtank was? I'm guessing they do but you'd know for sure.

I believe he mentioned his tanks are bigger the 2k tanks, so you would have to do some dremeling.

These are damn impressive. Have you considered making a 3k/larger version of this?

Also, have you taken these up to higher pressures?

[roboman]

Do these fit in the space where the stock Air Tech 200o airtank was? I'm guessing they do but you'd know for sure.

They're supposed to. I messed up on this one and made it 1/16" longer than it should be, so it doesn't fit.
However, I made one today that does fit, but the seal around the pin is no good.

Oz, I have considered it, and I definitely will, once I get a 3K. I've taken these up to 125 psi, and they're fine, though I wouldn't do that in a war, for safety's sake.

[thedom21]

Well if you are selling them I will take one. I need it to replace my leaky 2k tank.

[roboman]

Alright, but it could be a month or so before I have a design that I'm happy with.

[thedom21]

Alright, but it could be a month or so before I have a design that I'm happy with.

That's fine, just shoot me a pm when it is ready.

[NerfRogue83]

That's fine, just shoot me a pm when it is ready.

X2---I would love to have at least 1 for an upcoming build.

[k9turrent]

You actually finished it!!! Sweet!

[makeitgo]

I will definitely be commissioning one or five of these off of you. When you try your hand at replicating an SM5K tank, you will be rich!!!!

[Wickbuddy]

nice, i don't feel the need to buy one, but nice thinking. It will be hard for leaks to happen in that tank

[roboman]

I will definitely be commissioning one or five of these off of you. When you try your hand at replicating an SM5K tank, you will be rich!!!!

Awesome! Heh, if you can get me the dimensions of a SM5K tank, that will definitely be my next project.

[SonReeceSonJensen]

I'm not a materials engineer, and I don't know if it was resolved in the last thread, but does the conversion from plastic to metal effect the range or the amount of pressure needed for comparable range?

[roboman]

Nope, it's all based on the orifice at the front of the tank, the diameter of the plug, and the overall volume of the tank itself. In the current prototypes, I'm using a '1/2"' faucet washer, which is really closer to 7/8" at its widest point. Eventually, I'll get some smaller ones that are more comparable to the ones in actual AT2K tanks, so that the flow is improved.

[Nerf Gra]

I will also probably want one of these.

[roboman]

Alright, sounds good. I ordered 2' of the aluminum yesterday, which is enough for ~12 valves. Assuming I get them done in time, I'll bring them to 'geddon to sell. They're $20 each.

[KoRnEd]

Awesome! I will be buying 1or 2 at geddon. If I get my 3k before geddon, do you think you want to perhaps make a trade?

[roboman]

For the 3K? Probably not, I already have a deal going for one.

[KoRnEd]

Alright! I'll still be buying at least one of these at geddon so save me one. Back on topic,does the faucet valve require intens amounts of lubricant to hold a seal/ pull?

[roboman]

It requires next to no lubrication. I generally add a little bit of silicone to it, just in case, but I don't think it's absolutely necessary. The pull is a little harder than that of a normal 2K, but not significantly so.

IMPORTANT EDIT: Well, crap. My metal hasn't arrived yet. It's unlikely that I'll have 10 tanks at 'geddon. Hopefully, I'll have at least three or four, but there are no guarantees. There should be at least one, along with the two prototypes, for your viewing pleasure, and I'll be taking orders as well.

Edited by roboman, 27 June 2011 - 10:34 PM.