Oodassault 3.10

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16

About: Just an aging K'nex launcher builder

Heyo, it's my first Instructable in a long time. My apologies, I only ever made iterative improvements so I never felt like a full set of instructions was justified, but now I've made enough changes I figured it was time.

I've also started a blog at knexpression.com which is where I'll be posting most of my activity from now on. However, I do like the Instructables editor, and I know plenty of you still check out things around here, so I plan on posting more instructions here in the near future.

Anyway, on to the parts list:

Rods:

  • Green/Black: 86
  • White/Silver: 35
  • Blue: 1
  • Black/Clear: 1

Normal connectors:

  • Blue cap: 1
  • Tan lock: 8
  • Dark grey/purple: 16
  • Dark orange/brown: 11
  • Light grey/light orange: 4
  • Red/granite: 12
  • Green: 6
  • Blue 3D: 1
  • White/black snowflake: 4

Miscellaneous/special:

  • Black hands/'Y's: 33 (some of these can be omitted if necessary)
  • Blue spacers: 3
  • Silver spacers: 4
  • Ball joint sockets: 2 (can be substituted with dark oranges/browns if necessary)
  • Outer hinge halves: 2

Step 1: Layer 1

Fairly simple to start out. This launcher uses a couple tricks to remain compact but fairly durable. One trick is to connect black hands to white rods in an unconventional manner to avoid using blue rods.

Step 2: Layer 2

The second little trick I use is an interlocking connection for the barrel/striker guide construction. This shouldn't be too difficult, but be careful while lining up all the rods.

Step 3: Layer 3

This is where most of the action happens, so there's a bit more to worry about here. Hopefully you can figure everything out fine.

Step 4: Layer 4

This is the same as the other inner layer, except it's easier to attach the pieces individually at this point instead all at once in a layer.

Step 5: Layer 5

Almost there. There are a few tricky bits in order to finish the outside layers. Once again, it's easier to attach each chunk individually.

Step 6: Other Little Bits

There are a few quirky bits we've yet to do. Let's keep pushing on.

Step 7: Magazine

While the launcher itself is nice and compact, the magazine is essentially what gives this launcher any worth. These last parts shouldn't be difficult.

Step 8: Bands and Clips

You can use whatever bands work best for you, this is just my setup. It's just important that the magazine tilt-locking band is stronger than the mag follower band with a full magazine so it doesn't try to hinge open from the force of the loaded magazine. It's also important to put the tilt-locking band in such a position that you can tilt and hold the magazine open without it spontaneously slamming back shut.

Sorry that I don't have pictures for loading and firing. I demonstrate that on the video on my blog if you want to look at that for help. Basically, you can push down on the mag follower until it locks into the bottom of the magazine and then tilt the magazine back until it snaps into position. Then you drop Oodammo (red/granite connectors with white/silver rods) in, rotate the magazine back, and unlock the follower.

The clips are not necessary. You can individually load the magazine if you want. Those of you familiar with my previous designs, I had quicker to use clips, but they weren't as durable and risked falling apart in your pocket. These are designed with war in mind, holding firmly together in storage. These hold 11 rounds. It may be easiest (ironically) to load the rounds individually into the magazine and then stick the yellow rods in the slots (loosely) and then carefully pulling the block out until you can put the locking bit in.

To charge the launcher, just pull the striker back until you hear/feel it set against the sear. The safety can be engaged by rotating the trigger guard so that the peg of the tan lock blocks the trigger. Then you can quickly push the half hinge piece to disengage the safety. Don't aim at anything/one you don't intend to hit, even with the safety engaged. Be responsible and have fun!

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    16 Discussions

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    myOmy

    15 days ago

    The link to the blog isn't currently working. Not sure if that's on my end or not, but idk

    9 replies
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    TheDunkismyOmy

    Reply 15 days ago

    Thanks, let me know what you think of the 3.10 if you build it. Honestly, it was finickier for me than I would've liked, but still better than the last version that I posted. I haven't posted anything in a long time so I wanted to finally make instructions again. The blog has done wonders for boosting my activity since I'll talk about an old gun I made and then find ways I want to improve it so I can post instructions for it.
    Mmm try again, long story shot, the URL gets ruined when I put it on certain sites. I'll try to fix it.

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    myOmyTheDunkis

    Reply 15 days ago

    Got through to the website, I really like your approach to teaching new builders different techniques and stuff. I really like it. I remember back a couple years ago in forums you wanted to start a separate website but obviously I missed the announcement. Instructables really screwed up forums in my opinion by taking separate catagories out, that might be why I missed it, not sure.

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    TheDunkismyOmy

    Reply 15 days ago

    Thanks, though honestly I put the series on hold pretty quickly because I couldn't figure out what the next step should be. Like, you can go in many different directions after you learn the basics of power. Because of that, I wanted to make a very basic, very modular launcher that I could reuse for several lessons, like a basic block body, then a basic magazine, then a basic stock and pin guide, etc. But I haven't come up with it yet. Funny how it becomes more difficult to build something simple the more experienced you are.

    Yeah, I don't know why 'ibles decided to go back to its old style. Any sense of K'nex gunning community we had left died that day and I just about lost all hope. I had started working on a full website with new forums and intending to make my own instructions editor + Instructable importer, but it crashed while developing and I lost all my work, which was pretty soul-crushing. But I had registered the domain name already so I figured at the least I could get a blog going until I see activity justifies making a full-blown website again.

    Glad to see you're still around. Hope you'll keep building and perhaps can help spark some activity back to a dying hobby. Just need to keep getting and teaching new builders I think.

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    myOmyTheDunkis

    Reply 13 days ago

    Yeah, it is kind of hard to lower your building standards once you have reached a certain point lol. Sorry to hear about the website crashing, I'm sure that was disheartening. Glad you decided to do a blog though. I went all the way back on it and saw your instructions for a block trigger style gun, at least I think that's what it was called back then. That was ages ago, but its where I got my start too.

    As for me sticking around, I'm not so sure on how likely that is. I'm sure ill still be tinkering around with k'nex forever, but the last gun I built I kept around for 2 years before deciding to get off my lazy butt and post it. Dunno if you saw my MARR, but that was the one I had built for two years. Terrible shooting, but it looked nice and was really customizeable. Pretty excited about the oodassault though, maybe I'll make my own version and possibly make it into a rifle so it can have a pin guide? idk.

    Made a video on the oodassault because I didn't want to type a lot, but I kinda already passed that point lol. One thing I didn't mention in the video is that I think it is really piece efficient, not much is there that isn't essential to the gun.

    https://youtu.be/1Qc3qqitg8Q

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    TheDunkismyOmy

    Reply 13 days ago

    Indeed, but it's a nice challenge in itself, so I'll get to it..someday. And thanks, it certainly was upsetting at the time, but it made me realize before putting it out there that it really wasn't prepared for the real world anyway. It could've crashed at any point and lost everyone's data had I not got backups working correctly, so it's better it happened before that. Haha yeah, we all remember our first block trigger (I've been redefining a lot of terminology to be a little more accurate/less confusing). Back when we thought our own versions were "simple but powerful" and all that. It was very nostalgic. I kept that design around for a long time, sad I couldn't even remember the video I got it from.

    As long as you never truly quit, that's a lot more than most builders. Haha, well to be fair, my Oodassault and Barackuda have been the only serious things I've really done in the past 5 years. It's taken me just as long to post things. Hmm, the MARR slipped past me, but looking at it now, it's pretty slick. I like the concept of it, modularity is oddly not all that common for launchers made of a construction toy. Have any other ideas floating around? Else could revisit the MARR and see what else you could do with it.

    Thanks, I really appreciate it! Your clip makes sense, it's all about the trade off between speed of reloading and stability. Man the magazines are finicky as heck. Some people have better luck than others. My hypothesis on your magazine is that the pressure of the pusher bands keep the magazine pushed out a little and allow the rounds to exit cleanly, but when it begins to empty, the pressure of the tilting bands overcome the mag pusher and the pole starts to barely stick into the round being fired, which causes a whole mess of problems. That's why I had to carefully rotate a white rod in the gap to distance the magazine just right. I think Killerk's magazine connection method that I followed with the 3.8 is a little more reliable in that regard, but then it sacrifices some capacity and is harder to make a locking mag pusher for.

    Look forward to anything you might do with it. I've been curious to see a rifle version of it, could never pull that off myself. Hopefully you can figure out your magazine. Oh yeah, I've been meaning to get more of these, at some point you wanna be interviewed for a meet a builder post on the blog? (yeesh, sorry for the wall)

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    myOmyTheDunkis

    Reply 12 days ago

    Yeah I've always kind of wanted to make a guide to a build your own k'nex gun but it's really broad and would take a very long time to cover everything properly, but it would be a novel instructable. Both in the sense of novel meaning neat, but also as in a book lol.

    As for ideas floating around in my head, I have a ton lol, but little motivation. I've always wanted to revisit my idea to controllable full-auto, but it was always finnicky. Worked in theory but could never get a working physical version. Required a near frictionless pseudo semi auto RGB mechanism to even have a chance of working, but could work in theory. And almost all RGB semis have a ton of friction on the trigger. But I digress, there are a lot of things I still want to build if I ever get around to them. Still want to build a pump action that was way more clean and concise than the one I previously posted. If you look for it, it's on my other account, TheAwesomestDude. Still regret that decision to make a new account cause it just makes things complicated to follow.

    What you said makes a lot of sense, but I actually came up with a slightly different way to mount the magazine on the pistol that works better for me. Sadly I came up with it after I recorded these videos, so I'll either make another one or just take pictures.

    Here are the links to my oodassault rifle-ish version:
    (Actually I just figured out I could embed them)



    It's pretty neat but could still use improvement. Let me know what you think!

    And I'd totally be down to do an interview for a meet the builder post . Little different, but I like it.

    And don't worry about the wall, I've made just as many lol. I get the feeling like we could go back and forth like this forever.

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    TheDunkismyOmy

    Reply 12 days ago

    Indeed. We've all seen the value in it but it was just too large to tackle. It could literally be a book some day.

    Amen. Just having the willpower to build can be enough of a struggle. Did you get that idea independently too? I had the same exact idea, using a lever at the front of the semi-auto slingshot to act on the equivalent of a piston to automatically drive the trigger, making a truly fully automatic K'nex launcher. However, likewise, I could never figure out a frictionless trigger. Stacking up bands produces a lot of friction. Not to mention we'd realistically probably only get up to 10 or so bands before -something- starts failing. I imagine the thing would fire 700+ RPM so with only 10 shots or less, it'd be more like a sputter gun. Still, it'd be incredibly novel so by all means I hope you can figure out the trigger. And I'd love to see more pump actions, so do consider revisiting.

    It looks like it's off to a good start. It's not quite along my preferred style, but then that's just how modding goes, I encourage everyone take my designs and adapt them to their own tastes. Pin guides have always been challenging for me, they tend to be awkwardly placed on block-style bodies. It's something I'm actually trying to figure out on both of my current projects. So I'm glad you figured out something fairly clean with yours. Keep me posted with updates.
    We probably could go back and forth, so we should do it in an interview haha. I'll write up some questions and PM you eventually. I've a couple posts backlogged so I'm not in a hurry but I'd definitely like to start getting other builders involved so it's not just about me and my limited perspective. In the mean time, start thinking about answers to generic questions like how you started building with K'nex, your preferred kind of builds, etc.

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    myOmymyOmy

    Reply 13 days ago

    So within about 4 hours I have a working oodassault rifle with pin guide. The mag currently doesn’t lock back like your pistol, but I came up with a half assed solution that will work for now. It’s good enough for me to post and do a video on, but it’s too late for me to make a video today. I’ll make one tomorrow for you to see

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    TheDunkismyOmy

    Reply 12 days ago

    (not sure if the comments got out of order, 'ibles new comment system is slightly confusing)
    Ah, sweet, looking forward to seeing what you managed!

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    didexo

    13 days ago

    Very clean, I love it. Good to see a post from you.

    1 reply
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    TheDunkisdidexo

    Reply 13 days ago

    Heyo, thanks! Good to see you around.

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    myOmy

    15 days ago

    Dang. Nice seeing you around. Been a long time since I built an oodassault. Might build this in a couple days