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Nerf Law Rocket Launcher (and New Ammo)

My 100th Post

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#1 Llama Boy

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Posted 24 August 2008 - 02:48 PM

Helo I wanted to post something usefull for my 100th post, so I thought I would finish my .50 cal replica nerf gun, but I decided to post that later. So here is my LAW rocket launcher.

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Now you can see its a ball valve gun. The barrel is removable so you can load the rockets as shown in the picture below.

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These are the rockets. I thought of them one night and had to give them a try.

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They are made of napkins and a nickel as the weight. I am thinking of trying those little super bounce balls you get for 25 cents at Dollar Tree.This is how they fit in the barrel. Pretty nicely and they have a great seal.

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To make these you start out with one napkin that folds into 4 squares.

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Then you lay a nickel into the middle.

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Now lay another napkin over it.

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Now crush it all up and try to keep the nickel laying flat at the top.

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Now take another napkin and unfold it once. And lay the crushed up ones onto the middle nickel facing down.

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Now fold the napkin that the cruched part is on over the crushed part and twist it. Then put a rubber band or tape it closed. It should look like this.

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And your done. Now lets talk about the LAW.The LAW is a ball valve gun using: 1 1/4 PVC, a Ball Valve, A stem valve, And camo duct tape. With my rockets it shoots over 150ft with 40 pumps from a small bike pump from WalMart. It took less than 4 hours to complete, not including the glue drying. I may get some videos up on YouTube later. For now heres a couple more pictures.

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And thats my 100th post. Questions? Comments? Ask me them.

Edited by Llama Boy, 24 August 2008 - 04:09 PM.

Truce.

#2 perezinthenet

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Posted 24 August 2008 - 03:26 PM

is the ball valve easy to turn? I had a similar idea that would shoot the nerf ballistic balls and i was thinking of using a ball valve
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#3 Shadowblade

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Posted 24 August 2008 - 04:07 PM

What about those oversized stefans that people use for titans? It's made out of pipe insulation I think. There was a write up for these posted recently, but I forgot who did it. I'll post it when I find it.

Edit: Found it, Lt. Stefan did this write up recently. Super Stefans

Edited by Shadowblade, 24 August 2008 - 04:23 PM.

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QUOTE
Proverbs says, "The wise man doth not shoot the Viking in the ding ding for he shall pummel thee."

But you can totally shoot Vacc there, he loves it!

~Talio

#4 Llama Boy

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Posted 24 August 2008 - 04:10 PM

Mine was hard to turn to at first, but I sprayed the inside with WD-40 and it is really easy to turn now. I was thinking of giant stefans at first, but these are MUCH cheaper and work great. I dont use nickles anymore because I shot it outside a couple minuets ago and pumped it 50 times and the nickel shot straight through the napkin.

Edited by Llama Boy, 24 August 2008 - 04:12 PM.

Truce.

#5 imaseoulman

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Posted 24 August 2008 - 04:27 PM

I don't think giant stefans cost all that much. I mean, you were using money for weight. I'm pretty sure most weights cost significantly less than five cents a piece. What are you using now?

I see major durability issues with the napkins not to mention major inconsistency and lack of accuracy. Oh yeah, and drag which will slow down your projectile and limit its range.

And of course I can't leave out the obligatory anit WD40 reprimand. It's not good to use in PVC.

Lastly, what diameter PVC are you using?
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#6 Llama Boy

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Posted 24 August 2008 - 04:34 PM

I don't think giant stefans cost all that much. I mean, you were using money for weight. I'm pretty sure most weights cost significantly less than five cents a piece. What are you using now?

I see major durability issues with the napkins not to mention major inconsistency and lack of accuracy. Oh yeah, and drag which will slow down your projectile and limit its range.

And of course I can't leave out the obligatory anit WD40 reprimand. It's not good to use in PVC.


I already said I wasnt using nickles anymore and I am going to try super bounce balls. WD40 hasnt done anything to it yet and I made a it month ago.

Lastly, what diameter PVC are you using?


Please read the whole thing.

The LAW is a ball valve gun using: 1 1/4 PVC, a Ball Valve, A stem valve, And camo duct tape.


Edited by Llama Boy, 24 August 2008 - 07:21 PM.

Truce.

#7 g-force

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Posted 24 August 2008 - 11:30 PM

I see your interested in heavy weapons. Check out my compact cannon and sponge nerfers full cannon.
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QUOTE(Carbon @ Jul 28 2008, 03:25 AM) View Post

My god, you actually built it. To that, all I can say is, "bravo".

Chubbs

#8 CaptainSlug

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Posted 25 August 2008 - 08:38 AM

Mine was hard to turn to at first, but I sprayed the inside with WD-40 and it is really easy to turn now.

DO NOT use WD-40 on valves of plastics. It's not a compatible lubricant, but is in fact a rust breaker and degreaser. It will slowly eat away plastics and o-rings.

You should only use silicone lubricant with plastics.
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The little critters of nature, they don't know that they're ugly. That's very funny, a fly marrying a bumble bee. I told you I'd shoot, but you didn't believe me. Why didn't you believe me?

#9 imaseoulman

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Posted 25 August 2008 - 10:02 AM

Mine was hard to turn to at first, but I sprayed the inside with WD-40 and it is really easy to turn now.

DO NOT use WD-40 on valves of plastics. It's not a compatible lubricant, but is in fact a rust breaker and degreaser. It will slowly eat away plastics and o-rings.

You should only use silicone lubricant with plastics.

Watch out slug, he might lose his temper. He's kinda touchy about that sort of thing.
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#10 CaptainSlug

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Posted 25 August 2008 - 11:02 AM

Watch out slug, he might lose his temper. He's kinda touchy about that sort of thing.

And while I'm not pulling any punches: His ammo sucks and wouldn't be usable in a war. It's also not waterproof or even durable.
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The little critters of nature, they don't know that they're ugly. That's very funny, a fly marrying a bumble bee. I told you I'd shoot, but you didn't believe me. Why didn't you believe me?

#11 Llama Boy

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Posted 25 August 2008 - 04:01 PM

CS- Thanks for the info I never thought of that. I guess Ill clean it out and put some different lubricant on it.
Imasoulman- I really wasnt loosing my temper if you thought I was, I guess I some how typed it like I was.
My next project is going to be the 6 barrel CAW revolver grenade launcher, and I might expiriment with giant stefans, but really the current ammo really isnt as bad as you think. I have put a rocket through over 20 shots and it has yet to be damaged. For all of you who dont know what a CAW is here:
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Truce.

#12 thedap

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Posted 26 August 2008 - 02:07 AM

to make a basic trigger for a ball valve, you can drill holes close to both ends of the T handle of the valve and hook two bungee cords to them. hose clamp the other ends of the bungees to the pipe itself. the bungees should be good and tight when the valve is closed, so they want to yank it open.

the trigger itself is a strip of metal with an small L bend at both ends, something around an inch wide by .060 or so thick should work. make it long enough that you can hose clamp one end to the pipe and the other end hooks the T handle from underneath when the valve is closed. you might want it around 8 inches to a foot long. it will need a little twist to it and a bow to it, to hold on good to the handle. they sell metal stock at the hardware store to make it from. to fire it, you just squeeze the metal strip down against the tube, unhooking the T handle. looks pretty much like firing a real law rocket.

I have had good luck polishing brass ball valves so they move freely. I remove the handle and get a long screw with the same threads as holds the handle down and chuck it in a slow moving drill, like a cordless.
I add a bit of oil to the ball valve and spin it a few dozen revolutions and add some more oil. hold the chuck and turn the valve body to see how easy it turns.
don't overdo it or it will leak down.

plastic Ive never done so I cant say one way or another if it will help.
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#13 Llama Boy

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Posted 26 August 2008 - 03:14 PM

If I get time I will get some pipe insulation. That way you guys will shut up about my ammo.
Truce.

#14 imaseoulman

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Posted 26 August 2008 - 03:35 PM

Nobody is trying to pick on you, but this is just an outlet for a developing problem in the NIC.

I considered posting an article about it, but didn't feel that the need was that great...yet! But since this is already being discussed, I may as well point out that NERFing is firing foam.

If you change the ammo to something else it's no longer NERF. If you're firing plastic BB's, then it's airsoft. If you're firing gelatin globules filled with washable dye, then it's paintball. NERFing is the firing of foam at people.

We really aren't trying to get on your case; we're just trying to steer clear from a recent movement to alternative ammo. If it's not foam, it's not NERF.
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#15 Llama Boy

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Posted 26 August 2008 - 04:07 PM

So what would you call a napkin shooting LAW? :D . Anyways I will pick up some foam insulation soon.

Edited by Llama Boy, 26 August 2008 - 04:07 PM.

Truce.

#16 Ubermensch

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Posted 26 August 2008 - 08:23 PM

Ah, but aren't Vortex blasters considered nerf? And they shoot rubber rings...


*controversy*
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#17 Lt Stefan

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Posted 27 August 2008 - 12:21 PM

Cool design, but I definitely think that the rockets are not only unsafe, undurable, and inaccurate to some extent, but I feel that these things are more llike a potato gun ammo. And to use my rockets, you need a 1" PVC barrel that the rockets slide over, not go in.
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#18 Llama Boy

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Posted 27 August 2008 - 03:13 PM

Im going to make some similair to yours. Im going to bring a barrel from my current project the CAW and bring it to Home depot and see wich foam fits best in it. Then I will make some that fit IN 1 1/4 PVC.
Truce.


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