Oodalump's guide to performance K'nex guns

I just think this needs to be brought up again and seen some more.  Lots of very useful information in here for both new and experienced knex gun builders.  And no this is not outdated, do not look at the post date.  That is irrelevant.  

Here you go, read through all of it.  All of it.

This guide helped me a lot, and should help everyone else as well.

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Mepain3 years ago

Hay guize look what I found


A few of the pictures have been lost here, but it's a decent substitute until it's fully reconstructed.

Can someone with access to KI Ctrl+C Ctrl+V ?
The Knexer4 years ago
Idea time: On the swag boss try putting a black rod then tan rod as the two firing pins then make the rest default. wouldn't that be like a two shot burst? Keep in mind I havent built the swagboss. This will work if the rod goes out long enough. I think the turret will have to be modified a little or else turn it into a double sided mag. Its worth a try. A war worthy BURST assault rifle.
Depending on if you blocked the pins in the same spot, it wouldn't make a difference.
Did you mean to put this in Zak's thread? And if I remember correctly, it already had a two stage trigger that allowed the shots to be separate. If not, it wouldn't be hard to implement. But making different length pins would not be the best way to do it.
Kk. I am posting MY version of something like that. Spent a few hours doing it. Pretty nice actually.
ZakS The Knexer4 years ago
The swag boss already had the ability to be "burst fired", although could always be improved on.
KI does not even work.
TheDunkis4 years ago
The only thing that I really found incorrect is the statement that heavier pins add range. I discussed this in my concept automatic chambering weapon. Basically, an object with less mass than an object hitting it will only ever travel roughly as fast as the object hitting it. Now, there are factors such as compression and elasticity that also come into play, but for the most part are negligible (especially with stiffer black rods) because faster moving firing pins (or heavier rounds) will actually cause more compression anyway. Anywho, if you imagine a pin and a round coming into contact in slow motion, you'd see the pin hit the bullet and slow down ever so slightly (probably not noticeable depending) because it's transferring energy into the round. Then the round would start accelerating. Now, it really depends on bands and other factors, but at best, the round will speed up to the speed of the pin and then they fall out of contact as the pin hits the gun. There isn't any magic where all the energy of the pin is transferred into the round.

That was a long post so let me just get to the point if you'll trust me without reading:
Lighter, quicker pins are better. In fact, having a pin that is lighter than the bullet (but don't use a heavy bullet) would be optimal because it'd transfer all of its momentum. If someone could build a rail gun to test this for me, that'd be great. Make a rail with a pin as light as possible. Then also make a pin, without affecting its length to the bullet, that's a bit heavier.
TheRacker (author)  TheDunkis4 years ago
I see what you're saying, but that just doesn't seem right. A bowling ball would go farther if you swung a sledgehammer slowly into it instead of quickly hitting it with a regular hammer. I want to go to the hardware store and buy a metal dowel that is the same width as a knex rod and make a firing pin out of that just to see if my guns would work any better with it. Would be interesting to see.
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