I was trying to figure the size needle to make a fifty caliber machine gun, but without knowing the millimeter, I can't figure the size I need. I found a 1.25mm, but it looks pretty big, and my Sister give me some old needles from the old insulin, but now they look way to small for anything. Thank You in advance.

Kerry

A .50 cal is 12.7 mm which is 0.37 mm in 1/35.

I appreciate the answer AjlaFleche, I didn't know forsure but it did look awful big, more to the small cannon size, now all I got to figure is which one it will be good for, can't let a good scratch piece go to waste. Thank You again AJLaFlecleche

Kerry

And just to point out, that's the diameter of the barrel opening, not the diameter of the barrel itself. I'm thinking that you'd want something on the order of 1mm tubing (outer diameter) for representing the barrel itself.

Mika

I imagine if I find a needle the right thickness of needle, the metal around it will be sufficient enough, unless you wanted to put a cooling jacket around it, then I would look for some tubing to put holes in, but I found one of my fifty caliber machine guns, and compared it to this 1.25mm needle, and the needle is way bigger. I'll just cut the point off and some day need a small cannon, and this will fill the bill.

Needles, like wire, are measured in gauge. Most insulin needles are 27G or smaller. I think an 18 or 20G needle would suffice for a 50cal.

Patrick

It's often quite easy to calculate the diametre of calibers. a .50 is simply one inch (2.54cm)x0,50 = 12.7mm.
Yes, the bullets are rather big. I've got a used .50-projectile here at home - I shouldn't want go get shot by that one. Ever seen the 1/1-scale shellcasings then?



Here you see some projectiles. The one to the left is a .50-projectile. Compare it with the matchbox! (the other three projectiles are from left to right - 7.62x51mm, 5,56x45mm and 9mm x 19mm).

I've got a .50 cal dummy round with the "round"as well as a dummy 7.62x51 and multiple empty 5.56x45 shells, and the .50cal is feels twice as heavy as the 7.62mm. What I can't imagine is not just one shell, but 100 rounds in a box, both the weight, and the sheer destructive power on people and soft targets. Its amazing to comprehend.

of course that is what we as american cal 12.7 mm gun 7.xx is a 30 cal
butone can go further a 75 mm gun can be a 37 cal
a 48 cal etc there is a math formula that has to do with the mm of the barrel x or div by the lenth of the barrel that being the true definition of the cal of ant given gun