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The Pixieblast 9000 Fear it.

#1 User is offline   rork 

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Posted 02 December 2008 - 08:08 PM

As is probably obvious, I primarily work with springers. However, I have been intrigued by air guns lately; it seems that even as homemade springers get better and more widely accepted, homemade airguns remain primitive, overly powerful, impractical, and slow. For heaven’s sake, most airguns are either the same ball-valve crap that’s been (over) done for years, or based on Zero’s Cutlass design, which is flawed at best. There are a few exceptions, but those mainly serve to prove the rule. I decided to try my hand at making something entry-level: an air-powered carbine that used a hose handle as a firing valve—and that could be used in an actual war without fear of scrambling someone’s liver.

I started with the hose handle.
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Make sure it is threaded at BOTH ends. I picked mine up at Lowe’s a while back, and never did much with it. We’ll be using this baby in strange and unusual ways. I glued a bit of 1” thinwall over the front of the handle. We’ll be flipping it around, so as to get rid of the annoying angle often produced by these things. In the former bottom of the hose handle, which will be at the top of the gun, screw a ½”x3/4” adapter that has been cut down and wrapped in Teflon tape like so. It will be attached to the central T by a stub of pvc.
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The airtank is a 1 ½’ pvc coupler; in one end is a plug, and in the other is a 1 ½”x3/4” slip/thread bushing.
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Wrap the former front end of the hose handle in Teflon tape, and screw it in—but not before you drill a hole in the side of the tank and add about 8-10” of vinyl tubing. Drill a hole, jam in the tubing, and cover the whole thing in epoxy putty.

As for the pump, I used a $5 ball pump from Wal-Mart. I drilled a hole in a cpvc endcap, jammed my tubing through it, then covered it in epoxy putty. However, the putty failed to hold the cap to the end of the pump, so I covered the end of the pump in hot glue and seated the epoxy (which had been pressed flat against the end of the pump) into it. Presto--perfect seal.
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Here we can see how this thing is coming together...
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In order to get around the common problem with homemade airguns—too much air volume, leading to long pump times and too much power—I designed this thing around a 9" RSCB assembly, which holds 6 darts. The clip is surrounded by a bit of 1” thinwall, which is held to the central T by a screw, and the stock is glued onto this piece, as is the pump (mounted on the side).
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I didn’t have any suitable barrel material handy, so I tested it using a foot of cpvc. It shoots almost as hard as my SNAPbow. With a little brass/petg, this thing should be like a 6-shot, sexy-lookin’ Big Blast. Due to the single check valve and large- diameter pump, it’s bloody hard to pump—2 good strokes is all I can manage (I’m 6’ tall, 200lb., and work for a living), which serves as a sort of OPV; it has plenty of volume, but you can’t pressurize it enough to make it dangerous.

Gun porn. Here it is with a SNAPbow and a NF. Little fella, eh?
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In response to the plethora of Ancient God naming practices on these boards, I dub this gun...
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The PixieBlast 9000. Enjoy.

This post has been edited by rork: 02 December 2008 - 09:59 PM

<a href="http://nerfhaven.com/forums/index.php?showtopic=20296" target="_blank">SNAPbow Mk. V</a>
<a href="http://nerfhaven.com/forums/index.php?showtopic=20409" target="_blank">Make it pump-action</a>
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#2 User is offline   Radio 

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Posted 02 December 2008 - 08:18 PM

That's legit dude, does the trigger remind anyone else of anything?
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This post has been edited by Radio: 02 December 2008 - 08:23 PM

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#3 User is offline   orogomi ninja 

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Posted 02 December 2008 - 08:18 PM

Brilliant! What are the ranges?

Also: How does the hose connect to the air tank?

This post has been edited by orogomi ninja: 02 December 2008 - 08:21 PM

QUOTE(Blacksunshine @ Dec 23 2008, 06:18 PM) View Post

Thats the way I do it. Use a rag with some light fast rubbing.

Sometimes I hate my uncontrollable imagination....
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#4 User is offline   Daniel Beaver 

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Posted 02 December 2008 - 08:18 PM

Yum, this looks very easy to make. Thank you rork for giving us practical homemades!

How fast does that setup release the air?
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#5 User is offline   TantumBull 

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Posted 02 December 2008 - 08:21 PM

This might be the first homemade airgun that is worth using in a war... Bravo, rork, bravo!
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#6 User is offline   nerfer9 

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Posted 02 December 2008 - 08:25 PM

View Postrork, on Dec 2 2008, 08:08 PM, said:



As for the pump, I used a $5 ball pump from Wal-Mart. I



Looks like the cheap penis pump we found in the school geeks locker.

ON TOPIC:
I am not sure I understand how you fill it up though.
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#7 User is offline   rork 

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Posted 02 December 2008 - 08:25 PM

I haven't measured ranges, but they're less than optimal (although usable), as the barrel I'e been using for testing isn't even close to being right for this setup. Air release is actually pretty good; the upside-down configuration makes it easy to tap the trigger quickly. Here's Zero's old Cutlass design, for comparitive purposes.

http://nerfhaven.com...e/zero_cutlass/

EDIT: TantumBull: it's not the first, by any means. 3DBBQ comes to mind, as does CS's D-CHAP valves. There are probably others.

Nerfer9: What the fuck? How old are you again? And you put in air by...pumping. To load it, you pull off the barrel, drop a half-dozen stefans into the RSCB clip, replace the barrel, and go.

This post has been edited by rork: 02 December 2008 - 08:31 PM

<a href="http://nerfhaven.com/forums/index.php?showtopic=20296" target="_blank">SNAPbow Mk. V</a>
<a href="http://nerfhaven.com/forums/index.php?showtopic=20409" target="_blank">Make it pump-action</a>
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#8 User is offline   BustaNinja 

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Posted 02 December 2008 - 08:39 PM

View Postnerfer9, on Dec 2 2008, 08:25 PM, said:

View Postrork, on Dec 2 2008, 08:08 PM, said:



As for the pump, I used a $5 ball pump from Wal-Mart. I



Looks like the cheap penis pump we found in the school geeks locker.

ON TOPIC:
I am not sure I understand how you fill it up though.

You mean the penis pump you tried to use till you realized that nothing can compare to me?

Really now, just stop attempting to be awesome on the internet. Thats my job

*strikes completely gay anime pose*

On subject.

Great gun Rork. I can honestly I never saw it coming. You making an air gun. Wow, and its a beauty too.
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#9 User is offline   Carbon 

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Posted 02 December 2008 - 08:43 PM

Now that's an easy air homemade! Nice job with fusing war practicality with ease of construction.

Not sure why, but the fact that you're using the handle backwards amuses me to no end.
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#10 User is offline   rork 

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Posted 02 December 2008 - 08:51 PM

Bustaninja: Thanks. Carbon: Thanks to you, too. The backwards handle is actually quite comfy, and it solves one of the main problems that hose handles pose: guns made with them tend to come together at weird, annoying angles that make the gun awkward and uncomfortable. The threaded hose handle solves the other big problem: making it airtight.
<a href="http://nerfhaven.com/forums/index.php?showtopic=20296" target="_blank">SNAPbow Mk. V</a>
<a href="http://nerfhaven.com/forums/index.php?showtopic=20409" target="_blank">Make it pump-action</a>
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#11 User is offline   Talio 

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Posted 02 December 2008 - 09:38 PM

View Postnerfer9, on Dec 2 2008, 11:25 PM, said:

View Postrork, on Dec 2 2008, 08:08 PM, said:



As for the pump, I used a $5 ball pump from Wal-Mart. I



Looks like the cheap penis pump we found in the school geeks locker.

ON TOPIC:
I am not sure I understand how you fill it up though.


You play with fucking nerf guns. Lets be careful who we're calling geeks.

Anyway, someone made one of those a few years ago. Awesome to see the come back.

Talio.
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#12 User is offline   rork 

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Posted 02 December 2008 - 09:57 PM

Yeah, this is the result of way too much time spent trying to design a homemade firing valve, only to realize that the really cool thing would be to come up with something useful using a prefab valve. Ball valves almost invariably suck, and I hadn't seen anything using a hose handle that was really practical for the use I intended (ie, shooting people). I look forward to trying this thing with some brass...

EDIT: changed the topic name to match that of the creation...

This post has been edited by rork: 02 December 2008 - 10:00 PM

<a href="http://nerfhaven.com/forums/index.php?showtopic=20296" target="_blank">SNAPbow Mk. V</a>
<a href="http://nerfhaven.com/forums/index.php?showtopic=20409" target="_blank">Make it pump-action</a>
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#13 User is offline   CaptainSlug 

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Posted 02 December 2008 - 10:49 PM

The problem with air guns has primarily been one of cost, and a lack of suitable parts to use to make one. There are few to no valves that you can buy that will provide the flow rates needed to fire a dart.
Finding hose handles that have useful threads on them is also difficult since they are primarily made to screw onto garden hose, which is a straight thread (GHT 3/4) instead of a tapered one.

Some of the individual fittings you could use to make an air-powered homemade end up costing more than most whole Nerf guns. GHT to NPT adapters for example cost $10 or more.

And with Big Blasts being cheap and plentiful there's been little need to explore them.

This post has been edited by CaptainSlug: 02 December 2008 - 10:57 PM

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#14 User is offline   Draconis 

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Posted 02 December 2008 - 11:06 PM

View PostCaptainSlug, on Dec 2 2008, 10:49 PM, said:

Some of the individual fittings you could use to make an air-powered homemade end up costing more than most whole Nerf guns. GHT to NPT adapters for example cost $10 or more.



I was actually at ACE the other day and saw that they now have nylon versions of those adapters for about half that. The brass unit are still $10-ish.
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#15 User is offline   Doom 

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Posted 03 December 2008 - 05:38 AM

Hose handles usually have dismal flow rates so your ranges will be very limited. They're designed to shoot a small stream of water and often conserve water so you have to work around this. If you haven't already, I'd suggest modifying the valve. I had a hose handle with threads on both ends and I took a dremel to the stream forming part in the center that adjusts the size of the water stream. This increased the flow a good amount.

I'd suggest small QEVs if you'd want even more performance too. A small QEV with a blowgun as a trigger will have significantly higher flows and very quick opening times. QEVs are extremely efficient for Nerf. It'll have to be ordered online of course and will set you back about $20, but it's money well spent if you're looking for an efficient air gun.
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