Introduction: K'nex Innovation Blueprints: the SACFARV1.0

Picture of K'nex Innovation Blueprints: the SACFARV1.0

Hello K'nex community PotatoCoffee here with a new series of K'nex guns. Here I have two different versions of the SACFARV1.0 a larger double trigger version, and a more compact single trigger gun. Both have the same idea in mind. This gun is inspired by RollerCoasters when the gun is shot the firing rod ''cart'' fires foward and hits the bullet and then continues around the circuit to be blocked by the trigger again. If you need me to explain more then I am happy to. Picture two has the chain rotator.


jaffawarrior1 (author)2013-07-21

I desperately want to see this as a real build

Dusk Shadows (author)2012-08-28

Well could you make a blue-print of a bomb that would be used world wide???? i have plans EVIL PLANS!!!

I hope you mean K'nex...

haha NO!

Backs away...

tytiger33 (author)PotatoCoffee2012-09-04

Don't worry. I can get you a 30 mm auto cannon to keep the crazy man away.
If that don't work there is always the 50mm sniper cannon.

PotatoCoffee (author)tytiger332012-09-05

Bigger please. I scared! =(

tytiger33 (author)PotatoCoffee2012-09-05

Well then there isn't much bigger than the Schwerer Gustav with it's 11 ton shell.

PotatoCoffee (author)tytiger332012-09-05

Not big enough!

tytiger33 (author)PotatoCoffee2012-09-06

Sorry only thing left would be a Cold War Soviet 50 megaton thermonuclear weapon. But that is just plain suicidal.

dr. richtofen (author)tytiger332012-09-08

^Tsar Bomba

PotatoCoffee (author)tytiger332012-09-06

I'll have 6 please.

Lol, yay!

Oblivitus (author)2012-09-04

This is cool. The idea of using residual momentum to bring the mech back to it's starting position is new. I don't see this design as being as practical as some other similar semi-auto mechs out there, but it gets me thinking "what could that residual energy reset concept could be used for?"

PotatoCoffee (author)Oblivitus2012-09-04

Yes it's not the most practical of concepts, I was simply posting it because it was new, it would work and was overly complex. Thanks for checking it out out!


Oblivitus (author)PotatoCoffee2012-09-05

Yes, keep posting new stuff. Thanks!

PotatoCoffee (author)Oblivitus2012-09-05

I will.

innovanna (author)2012-08-27

Thats going to be a tough build because of the shape of knex. They cant bend or anything. But nothing is impossible. I hope u continue with this because that would be one hell of a gun if you pulled it off.

PotatoCoffee (author)innovanna2012-08-28

The cake is a lie, but inside the cake there are bendy rods.

innovanna (author)PotatoCoffee2012-08-28

Oh ok

PotatoCoffee (author)innovanna2012-09-04

I didn't see the reply, but yeah bendy rods was what I had in mind.

Sharir1701 (author)2012-08-31

i like the thinking, and if possible it could be very fun to play around with, but as far as performance goes, it's a completely unnecessary complication of the idea. the pin would be stable, like a normal one, but instead it would be pulled backward by a weak rubber band, causing it to reset/recock after each shot. i was actually thinking of something like what i described, that would also incorporate a modded version of kinetic's kinno-1 power pack, as well as an auto chambering mechanism (for more info on the AC mech, check out the dunkis topic, not sure what it's called, it's his third or fourth from latest, and also my three bolt actions 'ible, it's the TDAC). to sum up, it would be a removable power supply, pin system, bolt action semi auto rifle, that wouldn't be much bigger than the ZKAR, if at all. i'm putting it off a bit, because i'm working on something else, but i intend to work on that concept sometime. i hope i helped!

PotatoCoffee (author)Sharir17012012-09-01

Yes that did help, it was simply an idea to build up. If i have time I will update it. Thanks!

Sharir1701 (author)PotatoCoffee2012-09-01

Not quite sure what you mean by an idea to build up, but ok. When you say you will update it, do you mean make a sketch of my idea? Some other idea?

PotatoCoffee (author)Sharir17012012-09-01

I meant it was a V1 prototype kind thing. And yes, I would add some of your ideas. If you don't mind?

Sharir1701 (author)PotatoCoffee2012-09-01

Sure, just say it's my idea. Actually I'm not sure there's much point in it since I am working on it as we speak, but I have no objection.

PotatoCoffee (author)Sharir17012012-09-01

Okay sure! Do you want to collaborate on it? Or am I to noobish?

Sharir1701 (author)PotatoCoffee2012-09-02

sure ! that sounds great. you're not too noobish lol. where did that come from? besides, a collab with someone more experienced is always good to reduce levels of noobiness (talking from experience... me and oblivitus...). lol no but seriously, that sounds good. i think we might actually be able to pull off a real collab and not just a text one (as in using skype), because i live in israel, and you (i think?) in england. if i'm not mistaken the time difference is you're 2 hours back from me. ok good. i'm actually finishing a project i started about a week and a half ago, and you'll see what it is soon enough (it's just too long to explain), and it's very impressive. i suggest the following: since i draw as if i hold the pen with my nostrils, and i am currently occupied with this project, you try to draw the layout of the gun. by the time i will be finished with my project we should have a solid sketch of the gun. i will say again what you need to take in to mind when sketching below. when we are both ready, i will let you know how we proceed from there. it might take me a little while because most of my parts are used in my other project, and i might have to post it first so i could take it apart for pieces. about when (latest) does your school day end (your time)? mine ends latest at about 14:00 your time. also, bear in mind that i do study on sundays.

right, so about the sketch: the whole rubber band mechanism should be removable, like in kinetic's and innovanna's kinno-1. sketch it more towards kinetic's version, because what i have built is a modified version of kinetic's gun, but it looks the same externally. make the back end of the pin like a 3 way connector facing up, so a right angle at the back of the pin, and a thin rubber band pulling it backwards. remember there is no trigger mechanism blocking the pin, the trigger only releases a rubber band from the band magazine. below the pin should be some sort of auto chambering pin (refer to my TDAC to see roughly where and how it should look). the magazine i believe i will want to make either blue rod or yellow rod, so feel free to sketch either, it doesn't matter at this point. to help you imagine what i have in my head beyond that explanation, try to picture roughly most of the kinno-k (kinetic's version) attached to my TDAC, just without a trigger mechanism and with a right angle at the back of the pin and a band pulling it back. don't worry about the actual trigger mechanism... i have that done and you'll see how it works in due time. i hope that explains pretty much what's gonna happen. i actually think a collab on this one is a good idea. i'm glad you offered it. be warned though: it's gonna be a lot of work.

PotatoCoffee (author)Sharir17012012-09-02

Yes it will take a lot of work, my school day ends at 15:15 (17:15 your time) and I to study on Sundays. I will send you my Skype username via PM. And about the gun, would it still use my "track" idea ( the main part of this gun)? And I was thinking of adding the removable power pack to this blueprint, it's just that I wouldn't want it to look like copying.I am also attempting to purchase a 5kg box of K'nex off eBay so hopefully that will be enough. Changing the subject back (a bit), most of the time my computer is occupied so I mostly use my iPod touch to use instructables and Skype and am not sure if it is possible to send images with it. I am going to purchase a laptop next month so we may have to stick to talking and occasional images until then. Good luck. Let's go make it!


Sharir1701 (author)PotatoCoffee2012-09-03

i don't think you understood where i was going with this. i basically explained why the whole track thing is completely unnecessary, since it will be way too complicated, way too time consuming (between each shot), and i have a hard time believing it is capable of doing anything, while a simple stable pin being pulled back by a small band is much much better in every aspect. how come you study on sundays? you're christian, aren't you? besides, england is a christian country... when i lived there (yes i lived there for 4 years, london) i didn't study on sundays... how come? anyway, we can still skype from an ipod... nevermind whatever suits you. i don't think you can send pictures with an ipod... i never succeeded anyway. you shouldn't be needing so many parts dude... the gun should be average sized. the idea is to add the power pack to the blueprint, that is what i was conveying in the second paragraph of my previous comment. don't worry about copying, kinetic and innovanna both know i'm gonna attempt to make that concept and they both wanted someone to build up on it from the start anyway, so i hardly believe they will have any problem.

PotatoCoffee (author)Sharir17012012-09-03

If you lived in London why do you have an American accent? And can you reply to my Skpe PM, we can talk about the gun then.

Sharir1701 (author)PotatoCoffee2012-09-03

i lived there until 7 years ago. i had an english accent, but i lost it due to no exposure to any english accent, but rather being pounded by american TV and all the people knowing english around me also speaking in an american-ish accent. i can mimic an accent though, not sure how good it is, but i used to have a genuine one. i replied to that already. i'll add you on skype.

PotatoCoffee (author)Sharir17012012-09-03

I see, I don't know how but some people can keep there accents!

Sharir1701 (author)PotatoCoffee2012-09-03

yeah well i didn't try too hard either... if it helps you i'll mimic an accent when talking with you lol. no i'm kidding...

PotatoCoffee (author)Sharir17012012-09-03


Sharir1701 (author)PotatoCoffee2012-09-03

i lived there until 7 years ago. i had an english accent, but i lost it due to no exposure to any english accent, but rather being pounded by american TV and all the people knowing english around me also speaking in an american-ish accent. i can mimic an accent though, not sure how good it is, but i used to have a genuine one. i replied to that already. i'll add you on skype.

sunshiine (author)2012-09-03

This is very good! Hope you win something.

PotatoCoffee (author)sunshiine2012-09-03

Thanks for your support!

About This Instructable




Bio: Hey there, thanks for taking time to veiw my Instructable/profile, I am PotatoCoffee and am interested in building a variety of things: K'nex ... More »
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