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Topic: 37mm launcher, Tactical tip up< Next Oldest | Next Newest >
Patch Offline





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Posted: Aug. 01 2010,22:08 QUOTE

Inspired on GarageGunsmith by Princerobin, I found the idea of a 37mm launcher enticing.  I began kicking up ideas and drawings and ended up at a metal supply store.  A few weeks later, I ended up with my new toy.





After buying another tippmann a-5 grip to replace the one my .22 scavenged, I couldn't actually put it back on the paintball gun.  I love the lines and the feel of the grip so I put it to use on this build.  Likewise, the stock was taken off the same a-5.

The firing pin is actually floating and spring loaded to retract from the breech for easy loading and no possibility of a slammed breech setting off a round.  Just something I actually remembered to do on this build  :D

Still working up loads, but it was still fun to build.  Thanks for the help, encouragement, and inspiration.

Disclaimer: Under 40mm No more that 50grains per payload and under 65 grains used per lift charge.  No destructive projectiles...blah blah blah. GOT IT?!?!
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Patch Offline





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Posted: Aug. 01 2010,22:18 QUOTE

What does it shoot, you ask?  Here's how I build shells to fire up, into the air, and explode in a harmless blast of fire and flame.

Starting with a tube and 3 different plugs, I glue a solid plug inside the tube with hot glue.


Then, after loading 40grains of stars/flare/smoke mix, I add a remaining 10grains of whistle mix to pop the shell open.


Mix those up good and seal the deal with fuse plug.
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Patch Offline





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Posted: Aug. 01 2010,22:32 QUOTE

Insert 1.25" of cannon fuse cut with a razor and seal that in with some hot glue. (note: bottom plug is reinforced more so than the top plug)

Tissue paper wadding takes up the remaining space and is capped with an end plug.


A small tube is then afixed to the bottom for the lift charge.  Filled with < 1teaspoon of ffg and capped with tissue paper.

A new primer in the case and inserting the whole deal into the case creates a complete 37mm birdbuster.

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deth502 Offline





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Posted: Aug. 01 2010,23:07 QUOTE

nice gun, but im actually finding the info on loading the rounds more appealing. keep it coming!!
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theoldsarge Offline





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Posted: Aug. 01 2010,23:12 QUOTE

Interesting.  Don't happen to have a build thread for it, do you?  I like the load, be great in a small mortar, without the bottom metal case that is.

--------------
Theo - NC since '79; just east of Raleigh, North Carolina, USA, since '81
Oh Lord, let my words be tender and sweet, for tomorrow I may have to eat them.
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hammermill Offline
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Posted: Aug. 02 2010,01:03 QUOTE

just a note  in several states these are still considered pyrotechnic devices and fall under the guise of fireworks,
in oregon each shell would be worth 1000 dallor fine
also if fired at wildlife unless a liscened animal control person another fine  my understanding is flares and smoke ar the only two aproved devices for 37mm

by the way glueing tissue over the base of the lift charge
or assembling inverted make  this work a little smother

i will let some one else explain how a shell that explodes in flight misses the dd clasification.


Edited by hammermill on Aug. 02 2010,01:15
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buster charlie Offline
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Posted: Aug. 02 2010,01:15 QUOTE

Looks great. Would it be possible (I know i'm sick) to capture enough energy from one of these flare shells to cycle a semi-auto action?

Do they have ANY recoil?

How about a magazine fed pump aciton? :)
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Patch Offline





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Posted: Aug. 02 2010,12:51 QUOTE

So far, deth, that's all the load data I've been man enough to actually fire.  I may do a smoke and emergency flare round too, but I need to pick up some chemicals first.

Sorry Sarge, no build  :(   I always start out taking pictures, but end up getting excited and fly through a build by the seat of my pants.

And hammer, thanks for pointing that out.  There is the issue of being defined as pyrotechnic.  However, every year I purchase a permit to posses 1.4G aerial shells.  Later on, I then set up a permit with the fire marshall to shoot off my small stash.  Thankfully...they're my neighbors and enjoy the show as much as I do.  If any problems arise, I plan to use the 1.4G permit as a safety blanket.

I don't actually use them as "Bird Busters" as I don't have a bird problem, but thanks for bringing the wildlife control expert topic up.  Something to consider.  However, I've seen commercially available starburst rounds for 37mm unless those too are classified as animall control.  Marker and spotter rounds are approved also.

Buster, there is a bit of kick to it.  Semi might be pushing it, but pump... its out there.  This happens to be 40mm found off google


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hammermill Offline
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Posted: Aug. 02 2010,13:14 QUOTE

would suggest using short pieces of crackling or flying fish fuse as filler.  i will hope your tube is of a decient thickness. if i build one i was thinking of using hdpe tubing after seeing how it deals with a shell failure.


i have some close proximity shells that use 30mm casings   i had to electric fire them to get it past atf

enjoy
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nevadablue Offline
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Posted: Aug. 03 2010,21:10 QUOTE

Wow, thanks for this, Patch! You just solved my load questions for my muzzle loader I'm planning. Hooah! Been looking for that for a LONG time. Great job, the gun looks great, the ammo looks wonderful. :)
Would you weigh one of the loads (the whole thing you put into the case) please? That will let me continue with my design.


Edited by nevadablue on Aug. 03 2010,21:11

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