And the drone folds… | Community Build Pt. 5
Welcome back to what part is this? I think this is part four or five of the youtube community its when its starting to get good, yeah. Okay, so um im not gon na go into what this is about, because, if youre watching this, you probably already know whats going on here so lets just jump straight into it. On the last video, you guys voted on how this would fold and buy a landslide 76.3 percent of you guys voted for the overlapping info, which i know ryans excited about. I was excited about because we kind of wanted something cool like not gon na lie just low key something different. When we started this, i was. I was hoping that we would do something just kind of off the wall, and you know what i mean so im really glad that it kind of went towards this way. So that said, we sat down and we started talking like all right. Well, if its going to be overlapping unfold, how do we make something cool because i dont i didnt want to just do the obvious would which would be to take a pin and basically pin every single corner and solve it that way. I wanted something that had like that. It factor that x factor that, oh, my god, company factor like what we always do. So we challenged each other. Mainly me challenging ryan: hey. Can we think of something, just absolutely cool but still complex, but yet still simple, that solves the whole folding mechanism, but still make things you know like im, a guy yeah and and easy easy to work with right, uh, so uh we were originally going to do This by talking about the whole conversation of the design, but that was just gon na – be an editing nightmare.
So, instead we started working on it and now were just gon na go over exactly kind of how we got to this point, and i normally i like to talk about things and like simplify it. So that way, like im, not boring you guys, but because this is following the actual build process. I figured lets get to a little bit of nitty gritty and lets get ryan a little bit of sea time in front of the camera, so that you guys can kind of get to know him a little bit better and how his mind works. Uh, because its a little crazy, but but in a good way, so why dont i hand it over to you on uh on this. So, first of all, like again, i i wanted to challenge us into doing something, absolutely different, and normally when i say that we both start looking just completely outside of the industry, to kind of get some kind of crazy design, ideas and figure out how to incorporate It into here, and you had a great idea: yeah i saw how uh how knives actually unfold and fold and they lock in the closed position. They lock in the open position, and they do that. I mean it has to be safe. Its a knife, you dont, want it folding on your hand when youre holding it, so it has to lock in a sturdy open position. So when i looked at the mechanism that they used its not that complicated but its uh its exactly what we could apply here in the same thing, we could have done it on any one of the designs, but on this particular one it like worked out really Well, yeah, and the other thing that kind of lent itself to this design is because, like its arguably going to be a little bit more heavier uh of a design to have this mechanism, which ill help hell explain here in a second, its pretty cool um.
But because this is supposed to also be durable, we figured well then that means wait. The whole weight factor is completely at the door, which gives us kind of free reign to try and attempt something like this. So why dont you talk about kind of the initial steps and like the evolution to where were at today and then what we need to do after that yeah. So when i started this out, i knew that uh. We wanted this thing to to lock all four arms all at once and we couldnt just have uh. Have each arm swing one at a time and then lock and then swing another one lock. So i had to make one single block that would fit in the center and lock all four arms at once, and this is actually the block that i started with and its its just sort of a cube, the dimensions arent critical. This is just what we had but um, but youll notice that that it, it has like an odd shape, its not exactly a a square and thats on purpose. So when the arms are in the folded position, it has to the the part of the arm that stops to prevent it from over folding. Is this front edge its like origami yeah, but uh its its that front edge, and so i beveled that so that, when its folded its easy to unfold, you just kind of give a light press on this on this block to move it out of the way And then itll just slide past, that from a ramp when its in the open position its going to sit up against this full solid side and it cant move out of the way its only engaging this side and its pivot point.
So its locked in that position and so mind you like i, i really wanted something that was easy right, so i didnt want to have to undo a bunch of things just to get this to unfold because, like i said in the last video, if its a Hassle to fold like then whats the point right, because the idea is, you want to be able to pull up to a spot unfold. It defold it whatever and then go fly and put it or pack it back in your bag. So so there was a couple of uh. You know obviously some concerns about this idea which ill, let you explain and then ill have you explain like how we get to this next fight which, by the way he already mentioned, but i just want to just be absolutely clear here, because this is the internet. Dont pay attention to this shape. This is not how this is going to look like fine. You know as a final design. This is just part of our design process uh. This is how ryan and us kind of understands how the mechanism works or will not work, but just mind you. This is not represented the final design. This is more to just kind of illustrate the design concept and idea yeah, sometimes well print out a like ill. Have the thought ill draw it in cad, but then it in order to really wrap your head around it like.
I want to hand this to tommy and then tommy takes this and and just does it just play with it and then he could sort of say this works or yeah. This is just way too cumbersome or whatever, and normally what we do. Is he doesnt even tell me? He just gives it to me, and then i got ta just got ta figure it out and if i cant figure out how this goes together or how yeah, then that means its too complicated, so go ahead once you explain how we got to now. This is, i guess, well call it uh the next iteration after you started playing with this idea with, like the beveled stuff. Well with this one, the the one thing i started out with. I just had this flat. Bevel closure hold it close. Oh sorry, yeah! So it was just flat and that i only i was only focused on two of the arms um and then so i got that mechanism working where open position closed position. Everything works, but then i realized. Okay, i have this second set of arms and they have to be elevated because you can see that one set is higher than the other set because they swing past each other. So in order to do that, that block had to change. I dont know if you can see in there, but that block is now stepped and the geometry of that block, like the shape of it, is very important, its critical, because everything has to be able to swing past it.
Nothing can interact with each other. It just all has to to function smoothly, or else you get jamming up and binding. So once i figured that out got both of these positions. The problem i had with this little prototype was that it was over folding, so when it goes in the folded position, the arms were moving uh way too far past their their point, and they need to be sort of halfway there so that it can lock in The closed position, so what i ended up doing was putting these standoffs in these corners. This doesnt necessarily have to be there. It just has to. We have to have some sort of geometry that uh shares. This open position will stop it here and then, when its when its closed, it will stop it in the closed position, so uh thats thats. What these are for, theyll probably be something else in the in the actual, the final design but um, but yeah thats, where we got to and uh so this particular one. This one is kind of the most complete version so far, and this is as tommy said, this is not the final design. This is just to a mechanism, a compact mechanism, to understand how this will work. So this would be the bottom of the drone, and what i have here is a is a thumb screw its actually an m4 thumb screw. I had it, i dont know why, but you you unscrew it you unscrew it to loosen it, and then you just push on it and then that button is what releases you can see its pushing out the bottom of the that block, which allows you to fold The arms and you can see they stop in the correct position because of those stops and also when its open it.
It stops in that correct position because of those stops so now, when its all folded up, then to lock it back in this position. You want to push that block back inside between the arms. So then, you just tighten that thumb screw up again and now its locked in the closed position. Okay, really quick! I just want people to understand. Like you know, obviously we dont want to design something thats going to introduce frame resonance and things like that, and we want the whole thing to be solid. So i just want i just want, can you just demonstrate it well ill? Do it. So i just want people to know so this is a 3d printed piece right now lets just listen to this. Okay actually ill. Let you do it, but just and hold it up to the mic, because i just want people to know just how solid of this click that is when you, when you open it up the mic, picking it up. I dont know i dont know if the mic is picking it up if the mic didnt pick that up guys. Just trust me when i tell you that with a 3d printed design like this is already pretty solid. You know its solid, because i mean that shape is wedged together by that center block. I mean its its in this position, its as solid as a regular frame that does not fold right so um, okay, what are what are the whats, the next things that needs to be solved with this design, so uh, one of the things we have to figure Out is friction.
You cant, have carbon rubbing on carbon itll just start to wear itself away, so so we have to figure out a way to put either a teflon bushing or a or a bronze bushing in between the arms. Somehow that will allow it to fold and deal with the friction, but not compromise the the rigidity because i dont. If we just put like a washer in there, especially if its teflon, it might be too soft and will itll cause it to kind of bend in one way or the other, we dont want that. So we need to solve that um. We need to um uh. We need to make sure our tolerances are are correct, because uh that if we have a block, you know a piece of material up against another piece of material. It has to be has to be tight enough to to hold it in place, but not so tight that you cant you cant, get it to function, so we need to play with the tolerances and also we want to make this thing as light as we possibly Can even though you know light weight wasnt, our number one concern its still its got to fly at the end of the day, so um yeah, so again, just for the third time we want to reiterate. This is not how its going to look like okay. This is just a design study study of how how this is gon na work.
We feel really good about it, obviously theres a lot that can be done to reduce mass and things like that uh, but thats for us to. I guess thats kind of the next thing once we solve a couple more things is, the next thing is were going to obviously cut one out and crash test it just to make sure it will also test for frames and resonance just to make sure that thats, Not a problem, and the other thing that i was saying is like no matter what, when youve got things just constantly moving in the friction like somethings gon na wear out or even from a crash somethings gon na wear out, and so what i, what i was Telling ryans like okay, can we can we still do something where, even if something wears out that parts easily replaceable and so thats, what that center block or whatever other solution we we put in its place, is going to be so just know that you know once We kind of settle in on this particular solution. There may be a part that were going to consider just like a wearable item. You know like if you crash hard enough or if you just open and fold it enough times it might itll start to develop some loose tolerances, but we can replace it with a relatively cheap part and then itll be nice and solid again. The other thing that i was concerned about was like all right.
This is kind of getting complex, but not really uh can the arms still be easily replaced? The answer is yes, so theres no concerns about that um and then the last thing is that i i still dont know how i feel about it, but this is just kind of where this is gon na go, and that is because the arms are gon na Overlap, the way that they are motors on this side are gon na be bottom mounted motors on this side are gon na be top mounted, so that means youre going to have something that sticks down here, sticks down to here and were going to have to just Kind of figure out how to be part of the design, yeah yeah were just going to kind of figure out. You know: do we do landing gear? You know something i dont know, but i just want to throw it out there now guys that this is going to be different. This is going to be very, very different. Uh, so is there anything else? Did we miss um? No, i dont think so. One thing to point out is uh: changing an arm is this whole thing is just one bolt yeah, so so, if you do need to change an arm, you know assuming that the design stays this way. You literally just pop this one out. You loosen this up. Slides off put the new one in and youre good to go so thats not going to be a concern.
Yeah um, all right, so this is going to be a little bit on the heavier design uh. Once we have some more projections or an idea of exactly how much its going to weigh, then we can start thinking about what the powertrain setup is going to be, but for now its still a little too early to tell again for a fourth time. This is not the final design all right, i dont want you guys thinking. This is what its going to look like and start making decisions based off of this very early prototype. Im sure the comments will still yeah yeah but everythings ugly, its a brick yeah. Well, this is an ugly brick, but like this isnt going to be here like this, is not going to be shaped like this. This is going to change again. This is more of just a design study to kind of uh. You know hash out whether or not this is going to work out, but im curious drop it down in the comments. Let us know what you think you know is. Is it a deal breaker for you guys that motors are going to be oppositely mounted um? Because if you abs, if thats an absolute deal, breaker, which im sure ryan is already hating the fact that im bringing this up, then we could go in a different way. But ryans been working hard weve been all working, hard figuring out uh to get to this point um all right, i think thats it so uh.
This is more of an update, theres, nothing to vote here, guys, but definitely drop it down in the comments.