SA 3252 V.8.5

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Introduction: SA 3252 V.8.5

About: I paint, write music, and used to build knex guns. I have a Bachelor's Degree in Studio Art. - updated 5/7/2014
The latest in a long, long project. Well, here's what's new;

-This version has a structural core that absorbs all energy from the firing elastic (it transfers the energy through trigger blocks), preventing the mechanisms from being burdened with a greater load than they can handle. This should make the gun capable of handling the largest elastic that I own.

-Totally redesigned structure and mechanisms that take up less space and are much more stable than the previous version.

What stayed the same;

-still uses an alternating trigger mech

-still is powered by an elastic spool

-firing pin and crank are still basically the same


My short term goal is to make this fire gray connectors 30-40 feet semi-automatically. My next goal is to make it fire yellow rods 50 feet. After that, I want to make it into a semi-auto shotgun that will fire 3 yellow rods at a time 50 feet (using KILLERK's new shotgun system). That last one may or may not be my final goal. A fully automatic system is hypothetically possible with the amount of torque that I'm now dealing with.


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    53 Comments

    Lol. No offense taken. It's a semi automatic gun.

    you know, i'm looking at this now, at the comments i made only just a year ago below, and i feel so stupid, plus, i see this old thing and see just how fossilly it is compared to what i have today. i was always fascinated by this concept, you know. i don't think i ever told you, but before i begun work on it with you, i did make a nice little gun that worked, semi automatically, had about 8 shots, and was 5 layers with no paper. there was only one axle - the pin axle, and the trigger i described below was blocking directly on that. it shot about 6 feet, and i can tel a lot of things i didn't know about the concept back then, that i know now, how to make it shoot at least 25 feet, and it was much much smaller than what i have now too. also, i like how you said up there that you want to make it shoot grey connectors 30-40 feet, and then yellow rods 50 feet, and then multiple yellow rods a similar range... lol. i had to laugh like 10 times when i read some of the stuff here.

    6 replies

    It's amazing how far you can come in a year isn't it? I know I've come a long way too. And do you see how much this project has expanded your understanding? I know it has mine. Lol, yes, I have to laugh at what I was saying last year too. But at the same time I'm now wondering if maybe those lofty goals are in fact possible. But even if they're not, setting goals like that is exactly how I got the drive to start this project and keep going with it. Set your ultimate goal at infinity and keep making checkpoints.

    yup. totally. i know stuff now about this concept in particular and knex in general that i had no idea about a year ago. lol. i don't think the 3252 will ever be able to fling yellow rods more than 10 feet, because of interlocking, and because of their weight. if there's not enough drive in the first place to get it out of the gun, which i think the 3252 concept will never have, it will never be good enough. if you invented some way to automatically separate the rods, like shells or something, maybe, but i still don't think it's possible. as always, glad to be proven wrong, though.

    Yeah, and not just knex, but physics, engineering and the process of designing something. Oh interlocking is no problem. I'd just use a TR-18 turret. And if a stronger version of the alternating mech were made that could hold a really thick elastic than it is possible within the scope of the physics at the very least. Remember that you once said that 5 layers was probably impossible?

    yup. well, you would have to get some really really good and REALLY REALLY long bands, but i think the alternating trigger can hold whatever you want. what i do think is that the two cogs in between make it weaker, so you would want to have only one cog in between, or even, if possible (which i doubt would be without losing a great deal of power), no cogs in between. have the trigger blocks block directly on the pins axle. yeah, i suppose it would be possible. it would also be massive, because you would need to have a large space for the rubber band to go, even if you loop it around a few wheels. it would also probably use a butt load of wheels. it would have many practical disadvantages for us builders and users, but it would be possible, physically. lol, so what's your other concept?

    Okay, let me pitch my new concept to you then. It contains one black rod firing pin with a TR-18 turret feeding it yellow rod ammo. There is one elastic on the firing pin that will be just strong enough to get 50 feet of range. There will be a cog that releases elastics (like in an RBG system), each of which will cock the pin and fire a yellow rod 50 feet. That means that the RBG cog elastics will need to be at least a little stronger than the firing pin elastic, which won't be all that powerful anyway. It's actually a bit like what Kinetic is doing now in that it uses an RBG cog.

    After you bringing up my old claims, I'd almost like to try to make a really powerful version of the 3252 to fire yellow rods like I originally wanted to though instead. You know?, make the high powered laser gun.

    DAMN IIIIIIIIITTTTTTTTT!!!!!!!!!!!
    i just wrote a page long comment response, and when i clicked "post comment", it said my session timed out or something, as in it logged me out, so my comment is erased. UUUUUUUURRRRRRRRGGGGGGGGHHHHHHHH!!!!!
    in short, what i said was i have a much better idea how to do this concept, and i know exactly what you mean. it's been done before, don't remember who, what, when, why, where (lol), but i have an amazing idea combining the TDAC concept (auto chambering bolt action), kinetic's or innovanna's (depends which one is better) removable rubber band ratchet, and possible a removable bullet magazine (if possible). that would get over 80 feet thanks to the bolt action, and would be extremely reliable and fast. my idea to make it a lot better is to have a weak rubber band pulling the ram back, and have much stronger bands pulling the ram forward (on the cog). i know how to do it too. i'm really enthusiastic about it too.

    i don't need the drawing for this concept, but i'd be glad to see the other one you said you had.

    about the 3252, i had a really long response to that, but never mind that. i'll just say that i think i've done everything i can with it atm, and i'm posting mine, so everyone and you can build it and see how it's built. i'm gonna try the other concept now (let's call it RBP, for rubber band pin). about the yellow rods, i give you the building stick (lol, kidding). you can do whatever you want, i'm leaving it alone for now. i think the best way to have yellow rods (maybe think about shells as well) is a TR-18. actually, now i think about it (unless you can get it to have 18 shots), it would be smarter to have a smaller turret on that (or maybe you could find a way to temporarily move the turret aside while your cranking the thing again). i trust you to figure it out, but i'm moving to the other concept, and i'll keep you updated.

    P.S. this time i'm copying the comment so that if it happens again, i'll just paste it. thank god for the copy-paste.

    since i've heard you're dropping this project for now, and i had a great idea how to make it potentially work better, be 5 layer (with a crank sticking out the side) and not 18 layer, or whatever it is your's is, and rid the gun of the alternating trigger mech you made and replacing it with another trigger mech i have already constructed and checked, but i don't know how to call it, it's bassically like 2 trigger blocks one in front of the other. by default the front one is up and blocking while the other isn't blocking. when you pull the trigger, the front one goes down to stop blocking and the back one goes up to start blocking. when released the process reverses itself. after a whole repeating of this (1 trigger pull) the mechanism will let the ratchet attached to the crank rotate 180 degrees to hit the bullet and go back to being blocked by the trigger.


    my big question is: can i take your concept and work on it, and hopefully come to good results and publish it, of course giving you credit?

    4 replies

    That trigger probably won't work when you get the spool up to firing speed. That's how my first semi-auto trigger for this gun worked. The problem is the reset time. The spool can make a rotation or 2 before the block pops up. That's why I designed the alternating trigger mech, it has no reset time between blocks. I haven't seen your mech though, so I don't know for sure.

    then i probably didn't explain my trigger well... physically, the ratchet that fies the bullets cannot complete the 180 degree rotation before the trigger is released.

    Yes, go ahead. That's great! I was getting low on ideas anyway. It would be great to have some fresh ideas and approaches on it. If you want to post it, go ahead, as you said, with credit.

    thanks. i hope i'll get some results. i've already got a not bad trigger mech and a pretty good firing piston, i'm working on the mag, barrel and trigger right now.

    Yeah, it's time that knex guns came out of the dark ages and had a renaissance. :)

    Does that mean "me too"?

    It means I agree. For example if you made statement and many people agreed you could start a chain of +1,+2,+3 etc from all the people who agree.