0:00 In the last video, we built the world's most capable rock crawler, the rock sausage. Most of you guys said in the comments it would be more capable if we hinged it in the middle so this can move up and fit the terrain. And some of you other guys said, "What about steering it like a semitr?" I reckon this will be worse. So, here's what I'm thinking. A normal crawler goes up some steps. It can't go up steep enough, so it falls backwards. Now, with the rock sausage being longer, it doesn't fall back as easily. So, it makes it up the stairs. Now, my theory is if you hinge it, it will have more wheels on the floor, which I know is what you guys are thinking, and in theory, that's going to work better because more wheels on the floor means more traction. But what I'm
0:45 thinking, it's going to behave like two separate crawlers. And that one is going to fall over the top of that one. And then that is going to fall over like that. Next up, we got the wall obstacle. And on this one here, a normal crawler just does that. And the rock sausage kind of got to that angle and couldn't go anymore. But with it hinged in the middle, is it gonna flap over itself or is it going to go like that? These 10 cars here are my 10 favorite RC cars of all time. $10,000 worth. You can win these or these cars here you can win for free. You got the world's best RC car, the mighty X-Maxx, the other world's best RC car, the Primal Monster truck, the game over edition. 10 of my favorite RC cars of all time. You can win that
1:31 for £5, which is about $6. Or if you don't want to spend any money, all of these cars here, you can win those for free. Promo code free. Link down below in the description box. One other downside with the Rock Sausage, the steering angle isn't the best. So maybe if we hinge it this way, then we can have a good steering angle. So that is all stuff that we're going to try out in this video. What is Scotty doing over there? Oh no, Louis under the grass. Yeah, I was coming around here and the wheel just bumped off of there and just went like Well, that's what I'm blaming it on. Anyway, where did you get your license from? A cornflake packet. Ranger to the rescue.
2:20 Well, I'll do. Out comes this tiny knob. Get this on here. At least I know someone that's good at my clearing up a mess. Who's up then? Anyway, let's get this rock sausage built. If you haven't seen the last video of this car here that we built, then go back. I'm going to put a link to that in the description box and watch that video so that you know what's going on. But basically, we got three ravines and we joined them all together with one big long chassis. 3D printed all these bits here. So, we got 12 mil drive, 12 wheel steer. So, anyway, let's cut it in half here and hinge it.
3:05 [Music] So easy way to do it. It's only a prototype, so we can just hack it about a bit. And later on, we're going to build a proper one. We're going to really turn this into the ultimate crawler. Eventually, we're going to get metal axles, better servos, better wheels and tires. It's going to be the world's best crawler. So, at the moment, we're just experimenting. So, just to test the hinging, I reckon just put this together like that. Drill bit through nut and a bolt, and we can test it. Boom. There we go. So, now it can tilt all the way up like that. It can't go the other way that far cuz it's hitting the servo there. But we can give it a quick go. See what happens. Controller on and plug him in. So here we got the 12 wheel steering, 12wheel [Music]
3:52 drive over the computer. [Laughter] So Scott is just designing something here. This is what we're going to try later. So that's a ball inside of a knuckle or something. Socket. Ball and socket. So that is going to give us flex this way and up and down. But that is for later on in this video. For now, let's see what it does like this. Well, so far it's pretty [Music] good. Oh, it's doing really good actually. I do know what so far is actually better.
4:38 What staircase had to go a bit of an angle last time. Oh, I think here's making it worse. Look where that's going down was better before because that would just sort of hover above and go up and now it isn't. Ah, so in this scenario it's actually worse. Yeah. See, if this was not allowed to bend, what would happen would be that that would be like this and it would just get straight up. So, that is one scenario where it's worse. Here's how it did before when it was rigid. What? How is it so easy? Last
5:23 time when he was rigid, he couldn't get up this piece. Oh. Oh. Oh. It can't, can it? It can't. Surely. Surely not. No. Let's see how it does now. Is it going to Ah, that's what I thought would happen. Do it more gently. Yeah. Uh, it's not better, but it's not worse. Will it make it over the ditch that was a river and not anymore river? Oh. [Music]
6:13 I think it's worse that way. I'm inclined to say I was probably right in thinking it is making it worse. But let's try some obstacles. [Music] Yeah, I reckon the hinge has definitely made it worse. Next up, let's try the staircase of Doom. So, here's how it did when it was rigid. Now, let's see how it does when it's floppy.
6:58 I'm still doing it. It's still working. Not quite as good. It's struggling more than it was before, but it it's done it. Oh, the 3D printer has produced some goods. Here we got a pivot ball. So, this is going to be able to articulate in any direction. So, we just got to bolt that into there. What it's also going to do is going to limit it. So, it's going to stop it from all falling back like this. Here's another idea we've got. So, we can bolt this in here instead so it can only move up and down, but we can fit a servo. So, then with a dial on the controller, we can adjust the height exactly to where we want it. That might end up being the best compromise. We're going to try that later on. So, all we got to do now is
7:45 bolt that into there. Boom. So now it can move this way and it can move this way. No idea what's going to happen with the steering now. Oh wow. I think we're going to have to do something with the steering so that they the wheels steer in different angles cuz at the moment we can't really get it to go where we want it to go. Wonder what happens if we try different steering modes. So, we got like fourwheel steering, crab steer, rear steer. See what happens when you change it. That's rear steer only, front steer only, and then crab steer. All the wheels go in the same direction, and it's still not steering.
8:31 So, I think the best mode is going to be front and rear steering. But even in that mode, it just wants to twist itself up. But I've got an idea. If we just swap the direction of that servo and that servo, it might work. I'm thinking this wheel this way, these wheels that way, and then these two wheels that way, and that wheel that way. Is that going to work? No. It's just going to fight against each other and go in a straight line. If you had all these straight here, only the front and the rear. Uh, it's not any tighter steering angle than we had before. So, let's disconnect all the middle servos and just see how it goes with the middle wheel straight and just the front and the rear wheel
9:16 steering. So, now we've only got the front and rear steering. No, it's rubbish. It was better before, but it rigid. And look, it's not even no rubble. No, it was better before. Look, with it all being bendy, it's making it all uncontrollable. Just plops around where it wants. No, that's horrible. Just get it off. That's a great thing with this hobby, though. You try something, it works. Happy days. If it doesn't work, then you try something else until it does work. Sometimes we win, sometimes we learn. Let's get all these servos put
10:01 back in. Next up, let's try this contraption. This limits it a bit now as well. So, we might be the best of both worlds, especially once we get that servo [Music] fitted. And now it's going to flex as far as this. And the other way. And we got a bit more that way as well, cuz we got a bit of a gap here now. It's not hitting there as quick. [Music]
10:48 We're going to fit a servo to the middle in a minute and then it should be perfect. See, look, that's digging in there. If that had a servo there, we could lift this up a little bit like this. Um, that's going to be it, isn't it? That's going to be the one. Servo on there. Pull that up a bit. It's going to be unstoppable, isn't it? At the moment, though. It sucks. Next up, let's see if it works on this obstacle again. Will it work? Will it work with a servo on there? I think it will. Oh. Oh, no. No. Uh-oh. Oh no. Oh, I'm working off. Game over.
11:34 Let's get it back in the shop, make a new mount, and fit a servo. That's Scotty. He's just printing out the new version. This one's got a servo mount on it as well. Boom. It's [Music] [Applause] [Music] [Applause] [Music] [Applause] ready. So, now we've got 90° that way. And we can go this far that way before it hits on the steering there. So, next up, the servo. Shove that in there. Little link across. Plug that into the receiver. Then we can test it out. [Music] Yes. So, all we need now is this link here to put on there and onto there. Problem is, we stole this from the JTO
12:20 4x4 and the fixed link. So, we can't turn it. But maybe we can turn it. Razy. So, using the perfect pass soldering station and this has got a heater attachment, a heat blower. Looks like it's [Music] worked. All right, let's see if it works. So, we got the servo on this dial here. So, if we turn this, I should move it. The Traxxas hasn't got enough power. Perfect pass to the rescue. So, here we got a perfect pass. So, all metal geared, metal cased, 56 kilos of torque, probably three times that of the Traxxas. Let's get it in there. Boom. There we go. We got Razi all fitted in there. I don't know if it's going to work because there's so
13:06 much weight here. I can't see it working. Let's try it. Ready? No. Hasn't got enough power. That's so much force on this. So, as I thought with all that weight there, it's just asking way too much from the servo. If we take this off and we drill a new hole in the servo hole and move it further over, we can have less movement, but we're going to have double the power. So, here I'm just drilling a hole and then tapping in a new thread. Now, let's see what happens. Kind of, but hasn't got enough movement now. And this is definitely too long as well. Speed controller might not be putting out enough power for the servo. That might be why it's struggling. Anyway, I have an idea. So, this servo here, 7.4 volts. That's a lot more than what the speed controller is
13:52 giving out. And if we cut this servo lead and plugged a positive and negative directly into the battery, is that going to work? It might be fire. But let's give it a go. Positive. Negative. There we go. That in there. No, that's still working. That's working. That isn't working. This is like one of the most powerful servos that you can get really for this size. is you go fifth scale, but then you're going to get so heavy and so topheavy. I think everyone that said bend it in the middle, we tried, but it doesn't work. Not how we did it anyway. But before we give up, I've got a couple of other ideas. This arm here is definitely too long. It's too much of an angle. So, we got a shorter one here. So, we got to twist that round the same as we did with
14:37 that one. Get this one to fit. There we go. Shorter arm. Boom. There we go. That's a much better angle. Can't see it making massive difference, but let's see. Well, it's happier. Well, it is kind of working now. You're not getting much travel, but it is working. Give it a little go. See what this does now. [Music] Blasted. No. I thought ABS is supposed to be strong. We'd have to print that solid. Imagine a load just putting on that poor little servo. I expected it to go there, not there. These are supposed to move
15:23 little wheels from like a tiny little distance. And here we're expecting it to do all of this lot. Once we go metal axles, it's going to be like double the weight. We got better tires on there. We're going to end up with such big servos on there. It's going to be topheavy. So, we're just going to glue it back together for now. Nut and a bolt through there to pin it and just just see how it behaves. Just out of curiosity. So, let's get these screws on there. Boom. Nut and a bolt through there. Is it going to [Music] last? So now we can move that that way. Move it back again. So then we can move it the other way. Move it the other way again.
16:12 It's going to break. Ah. I don't know. Even if it works in the real world, moving the dial all the time is a nuisance. Still falling to bits. Game over. Game over. I think a servo is not the way to go. We've got so much load on here, we're just going to end up burning it out. So, what I'm thinking, what if you had like a winch servo that can just keep going and you had that on like a worm drive and then the worm drive can lift it? It's going to be slower, but you're taking all that load off of the servo. Any of you guys know in the comments, give me some comments down below cuz we're not experts. But if any of you guys have got a good idea, we might try that and revisit that in a future video. Next build of this, we're going to build the perfect rig. I was
16:59 happy how it was rigid. Anyway, so we're going to put on some metal axles, better motors, better tires, better servos, and we can still mess about with this hinging system in future. So, subscribe and smash the bell so that you don't miss it. And don't forget, you can win all of these RC cars here. 10 of my favorite RC cars of all time. We got the Traxxas UDR. We got the Kraton 6S EXP, the X-Maxx latest version with belted tires, Infraction Max/ TRX4. We got a lossy son of a digger. And we've got the Primal Game over Monster Truck, the world's biggest RC car and the best RC car of all time. So, check out the link down below in the description box to win all of this lot. Or if you want to win
17:45 something for free, I've got all these RC cars here that you can win for free. X-Maxx, JTO, and the Hoonigan. Click here. Click here to subscribe and become part of the crew. It's free. Or click here to see one of my other videos. [Music]
