10 replies to this topic

[arfink]

Could someone with a hornet tank please give me approximate dimensions of the tank?

Yes, I searched. I found nothing. Thanks very much.

[Draconis]

Could someone with a hornet tank please give me approximate dimensions of the tank?

Yes, I searched. I found nothing. Thanks very much.

Each individual tank is about 1.125" in diameter, and about 2" long, not including the port on the back, or the barrel.

[phillypretzel]

Each individual tank is about 1.125" in diameter, and about 2" long, not including the port on the back, or the barrel.

That's interesting, I was going to say I don't know that anyone has ever posted exact dimensions before, but here is a really useful thread that has good pics and provides decent relative dimensions (by showing the tanks inserted into standard pvc fittings):

http://nerfhaven.com... tank expansion

It is also looks like a really cool thing to try with extra hornet tanks.

Edited by phillypretzel, 12 January 2011 - 02:59 PM.

[shmmee]

Each individual tank is about 1.125" in diameter, and about 2" long, not including the port on the back, or the barrel.

That's interesting, I was going to say I don't know that anyone has ever posted exact dimensions before, but here is a really useful thread that has good pics and provides decent relative dimensions (by showing the tanks inserted into standard pvc fittings):

http://nerfhaven.com... tank expansion

It is also looks like a really cool thing to try with extra hornet tanks.

Just ignore the second part (output expansion) I eventually got it to seal, but enlarging the output hole sends all the contained air back through the piston stem instead of shifting the piston and venting out the barrel. But that whole mess is covered in later posts.

[phillypretzel]

Just ignore the second part (output expansion) I eventually got it to seal, but enlarging the output hole sends all the contained air back through the piston stem instead of shifting the piston and venting out the barrel. But that whole mess is covered in later posts.

I don't want to hijack this thread, but shmmee can you link to those later posts? I really dug the original thread.

[cheyner]

I don't want to hijack this thread, but shmmee can you link to those later posts? I really dug the original thread.

Are you actually so useless that you cant click on the link YOU posted, and scroll to the bottom of the page?


On topic, are you planning on making your own with these dimensions?

Edited by cheyner, 12 January 2011 - 05:02 PM.

[arfink]

I don't want to hijack this thread, but shmmee can you link to those later posts? I really dug the original thread.

Are you actually so useless that you cant click on the link YOU posted, and scroll to the bottom of the page?

On topic, are you planning on making your own with these dimensions?

I asked the question for 3 reasons:

1- sheer curiosity

2- I have something I'd like to stick a piston-valve tank into and though hornet might be close and wanted to be sure

and 3- Yes, I am in fact interested in making an all-custom tank of roughly the same size or maybe larger. Though the dimensions of a hornet tank specifically are not as important to this goal. The dimensions give me a rough approximation of the volume of such a tank though, which is helpful.

[shmmee]

and 3- Yes, I am in fact interested in making an all-custom tank of roughly the same size or maybe larger. Though the dimensions of a hornet tank specifically are not as important to this goal. The dimensions give me a rough approximation of the volume of such a tank though, which is helpful.

Building your own backfire tank sounds like a really challenging project. Let me share some lessons learned.

From my failures in working with hornet tanks I've learned that you need to:
Make sure your barrel side internal peg is a smaller diameter with less contact surface area than the inlet peg (the peg the piston sits on) or it will just vent back out of the piston stem instead of shifting the piston and venting out the barrel.

From my successes in working with hornet tanks I've learned that you need to:
Keep your blast valve as close to the tank with the shortest amount of tubing possible. The less air there is to vent the quicker your piston will move out of the way, and the more force your tank will fire. (And yes force. I can actually feel and see it kick my thumb when held above the tank nozzle.)

And from my recent observations I've decided that Cheyner is a mean-spirited cur who would probably flame his own grandma if he found the opportunity. Apologies to Phillypretzel, i should of said "later replies" instead of "later posts". That was unintentionally misleading.

If you want to buy a bigger volume back fire tank, try one from a big salvo. I haven't played with them, but they come highly recommended. (or expand a hornet tank) [self serving plug].

Edited by shmmee, 12 January 2011 - 09:29 PM.

[Draconis]

And from my recent observations I've decided that Cheyner is a mean-spirited cur who would probably flame his own grandma if he found the opportunity. Apologies to Phillypretzel, i should of said "later replies" instead of "later posts". That was unintentionally misleading.

I'd have to argue against this. It really wasn't that misleading, nor is it difficult to locate the replies Pretzel was after. He needs to try a little harder.

[phillypretzel]

And from my recent observations I've decided that Cheyner is a mean-spirited cur who would probably flame his own grandma if he found the opportunity. Apologies to Phillypretzel, i should of said "later replies" instead of "later posts". That was unintentionally misleading.

I'd have to argue against this. It really wasn't that misleading, nor is it difficult to locate the replies Pretzel was after. He needs to try a little harder.

The wording of shmees post lead me to believe that there were additional threads he had started, seperate from the one I linked to, related to his experiments with hornet tank expansion. None of which I need to explain to any of you... I do not have the luxury of spending my days logged into nerfhaven, pouring over every single new post and/or thread that appears: sometimes I miss things, some of which are useful or of interest to me. The entire reason I posted here was to help someone else with a low post count find the information they needed. It is neither useful nor productive to engage anyone in a flame war (which would be easy enough to do), and I won't participate in the "alpha dork" mentality that plagues this site, and frankly wastes server space that could otherwise be filled with the sharing of ideas, which is in fact the point.

[arfink]

and 3- Yes, I am in fact interested in making an all-custom tank of roughly the same size or maybe larger. Though the dimensions of a hornet tank specifically are not as important to this goal. The dimensions give me a rough approximation of the volume of such a tank though, which is helpful.

Building your own backfire tank sounds like a really challenging project. Let me share some lessons learned.

From my failures in working with hornet tanks I've learned that you need to:
Make sure your barrel side internal peg is a smaller diameter with less contact surface area than the inlet peg (the peg the piston sits on) or it will just vent back out of the piston stem instead of shifting the piston and venting out the barrel.

From my successes in working with hornet tanks I've learned that you need to:
Keep your blast valve as close to the tank with the shortest amount of tubing possible. The less air there is to vent the quicker your piston will move out of the way, and the more force your tank will fire. (And yes force. I can actually feel and see it kick my thumb when held above the tank nozzle.)

And from my recent observations I've decided that Cheyner is a mean-spirited cur who would probably flame his own grandma if he found the opportunity. Apologies to Phillypretzel, i should of said "later replies" instead of "later posts". That was unintentionally misleading.

If you want to buy a bigger volume back fire tank, try one from a big salvo. I haven't played with them, but they come highly recommended. (or expand a hornet tank) [self serving plug].

I'll just ignore the last two posts and reply to this one. ^

Thanks for the input. Yeah, piston valve tanks have to rely on the principle of the pilot valve venting faster than the speed at which the pressure in the pilot and the chamber can equalize. That way the air will take the path of least resistance ad rip open the piston, rather than leaking around the piston and back out the pilot.

And yeah, with a hornet that equalization speed is fairly high I'm told. Thanks for the advice, I'll keep it in mind.