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Post by sgort87 on Jul 15, 2005 14:54:38 GMT -5
Okay well after the decision to make it 1/2 inch, I recalculated the power needed to actually be about 50 times that of an airsoft gun. It all depends on how long you make your pellet. I calculated for one thats an inch long. A half inch long one would be half the power which is still insanely high (25). Good luck though.
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Post by blowemupspudguy on Jul 18, 2005 10:58:43 GMT -5
i plan on using small paintballs/marbles or anything else like that. also 1/2 inch is the outside diameter of the pipe, so it will be less that what you calculated. even if it is 25 times an airsoft gun it would be about a 125 lb pull, i can at least cut that in half with a lever which is a very easy pull if you have it in the right position. anyway, im gonna try it
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Post by sgort87 on Jul 18, 2005 22:07:42 GMT -5
Yeah, my bad on calculation errors on that. Umm yeah, I'm not really trying to discourage you. Actually the topic intrigues me. I am just warning you on the problems that may occur power-wise. I have used airsoft guns that are actually very hard to c0ck even with levers. I have an idea that may help on your triggering system if you are having trouble with that. Good luck man. Godspeed.
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Post by blowemupspudguy on Jul 19, 2005 7:57:37 GMT -5
thanks
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Post by sgort87 on Jul 19, 2005 12:26:56 GMT -5
FYI tho, the interior diameter of 1/2" is actually 5/8" which really is larger than 1/2". The outside diameter of 1/2" is 7/8" which is almost an inch. The number assigned to a certain pipe is the interior diameter. And they usually give an extra 1/8 to 1/16"" or so. Like 2" sch40 is actually 2 1/16"
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Post by blowemupspudguy on Jul 19, 2005 13:31:32 GMT -5
i see that now, thanks. also i wanted to say that it will be eaiser to fire because the projectile will be a sphere not a cylinder like a potato slug, i don't know if you calculated it like that or not
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Post by sgort87 on Jul 19, 2005 20:07:29 GMT -5
I calculated for a small slug with the same length as the diameter which is about the same volume of a sphere. Should be 25x times. This can be done much easier by using metal. Back in the 1800's on the Lewis and Clark Expedition their hunting rifle was actually a spring action rifle that shot lead slugs with a diameter of about 3/8".
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Post by blowemupspudguy on Jul 19, 2005 21:10:13 GMT -5
that's a big bb gun
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Post by sgort87 on Jul 19, 2005 21:21:32 GMT -5
Indeed it is, hehe. They killed all sorts of animals with is, so it did have some good power to it.
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Post by blowemupspudguy on Jul 20, 2005 20:51:06 GMT -5
yeah and they prolly used lead shot, which is alot heavier than a paintball or potato slug
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Post by sgort87 on Jul 20, 2005 20:58:30 GMT -5
yyyyep.
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Post by blowemupspudguy on Jul 22, 2005 21:45:56 GMT -5
ok i decided to build a smaller version of the gun before i make a large one. im making the chamber out of a calk tube, im still in need of a spring though
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Post by sgort87 on Jul 29, 2005 1:31:18 GMT -5
Check at hardware stores. They usually carry a small stock of springs with different lengths and strengths. But it may be a bit more difficult to find the pushing type of spring in your size.
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Post by blowemupspudguy on Jul 29, 2005 1:54:21 GMT -5
yeah i thought about that. if i can't find what i need, iv been thinking about how to use a pulling type spring. it's too complicated to describe, if i am forced to use it ill try to post some pics.
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Post by sgort87 on Jul 30, 2005 18:38:56 GMT -5
Nah, don't resort to that. I'm sure if you look hard enough on the internet you can get it easily.
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