Rambo Would Be Proud!

VH_man · Mon Jul 09, 2007 8:15 pm

ok. that cannon is officialy effing awsome........

i want to see a penumatic from you?

one question. do you have any good methods for drilling holes in nice, even patterns for mock heat releaser things? i want to give the barret 14mm one but im afraind ill mess it up.

utz · Mon Jul 09, 2007 8:37 pm

Take your time, measure it off in the exact pattern and spacing you want then use a wood type boring bit. It looks like a little spike with flat metal to the sides. I used a 3/4" size and just go real slow until it starts drilling in the right area. The time consuming part came after the drilling. I hand filed and sanded a rounded edge on each hole!!! That took forever, but it makes it look much better. I suppose you could use a counter sink bit...

but I didn't have any.

Binder17 · Mon Jul 09, 2007 9:10 pm

That is a very nice cannon. Good work!

utz · Mon Jul 09, 2007 9:19 pm

Your paint job inspired me to bag making stencils. Holding real leaves in front of the gun is much easier and gives it a more "natural" look.

rednecktatertosser · Mon Jul 09, 2007 9:40 pm

utz wrote:Take your time, measure it off in the exact pattern and spacing you want then use a wood type boring bit. It looks like a little spike with flat metal to the sides. I used a 3/4" size and just go real slow until it starts drilling in the right area. The time consuming part came after the drilling. I hand filed and sanded a rounded edge on each hole!!! That took forever, but it makes it look much better. I suppose you could use a counter sink bit... but I didn't have any.

Spade bits dont leave as clean a hole as a Forstner(sp?) bit. although they are a little more expensive i prefer using them.

VH_man · Tue Jul 10, 2007 5:44 am

YAY i have a crapload of forstener bits!

god i cant wait to update the barret 14mm. its gonna own.

and what kind of T is that you used as the chamber? it looks quite ergonomic.

utz · Tue Jul 10, 2007 8:11 am

I will have to get some of those bits...I think they are the long cone shape bits?? That T is a neat little chamber...at least I think. I used it on my first potato gun(post: "simple, cool, effective first tater gun"), and it seems to work real well. The shape must mix the fuel real well because I get a first shot virtually every time. It is just a larger version of a "cleanout T". They are a little more rare but around.

sk8er548 · Tue Jul 10, 2007 10:13 am

Thats one nice looking cannon i tells ya

flamerz14 · Wed Jul 11, 2007 4:22 am

This is so beautiful..love the camo and the guard...cheers to you!

utz · Wed Jul 11, 2007 6:36 pm

Thanks, I'm working on another sweet cannon. Will have another version of the heat shield, I really like that feature, and some different type of paint. Will post in a few days or so. Then I really want to look into a pneumatic design. They ARE more quiet...right???

VH_man · Wed Jul 11, 2007 8:07 pm

depends on how you make them, and the pressre you run it at..........

if youre going for quiet, use a smaller chamber volume. it decreases the pressure of the air exiting at the end of the barrel after the projectile leaves.

but yeah, they are loud, but not as loud as a combustion with a bad CB ratio.

Binder17 · Wed Jul 11, 2007 10:34 pm

does it used metered fuel or aerosol? Is the valve for venthilation?

utz · Thu Jul 12, 2007 7:20 pm

Thanks for info on pneumatics. The valve is just a fancy way of getting the fuel in. I have been using aerosols(new type of Right Guard...small bottle) and have good results with ignition. The valve can also be used to vent after the shot. I normally fire then open the valve during reload and it seems like enough time to get the gun cooled down and "refreshed".

rednecktatertosser · Thu Jul 12, 2007 10:52 pm

utz wrote:I will have to get some of those bits...I think they are the long cone shape bits?? That T is a neat little chamber...at least I think. I used it on my first potato gun(post: "simple, cool, effective first tater gun"), and it seems to work real well. The shape must mix the fuel real well because I get a first shot virtually every time. It is just a larger version of a "cleanout T". They are a little more rare but around.

No forsner bits look like this

utz · Fri Jul 13, 2007 5:22 pm

OK, thanks I thought they were like a long cone shaped type bit. I did get some new countersink bits from Lowes the other day, just a small cheap set to try out. So far they look like they are working real well. I would have saved a tremendous amount of time if I had some of those!! I am pumped about by next gun...I think the paint job is going to be nicer than the Rambo gun. I think it should be done by Sunday.