Aurorasaurus

I made a 7x9 frame for this, and you just use a 28t gear to drive the diff, and it's centered. It's 7x9 to fit a diff lock length-ways rather than vertically.

I can't think why not! Also, that's a pretty neat contraption :)

Well, firstly I'd like to say thanks! And now I present the latest result of my foolish obsession with making the best rally chassis I can: This one is gone now, I'm trying to get the front axle to have less resistance, as it was made like this: This lead to a lot of resistance since the angle part thing was bent a little in order for the driveshaft to go through it. The rear drivetrain was also flawed, believe it or not, 12 tooth bevel gears cant handle the full power of two BW motors! So then, the latest version I'm working on has me using 28t gears for the rear, as they've been strong enough in the past, and I came up with a narrower front end, by 2 studs.

Its big, yes. You could cut down the pieces but then it kinda defeats the point...

You can use a small pen spring and a 5.5m axle with the new extendable cv on one end, so the pen spring pushes against the extendable cv and the circular part on the 5.5m axle. This applies a bit of force to keep the axle falling out. So it's doable, at least in regards to the driveshaft.

You're a madman, and I love it. 11x15 frames inside the wheels is just ridiculous. Did your wheels ever come off?

I love it! Those custom wheels are amazing, do you know their diameter? It's good to see you back making videos, I hope it continues!

I believe those are from the CADA F1, but I may be wrong

Hello! I feel I should poke my head in here, but I dont actually have anything to add, since Jim did a great job saying everything I would have :) An example of something I'd post here, admittedly more finished than most things I work on: https://bricksafe.com/pages/Aurorasaurus/42077-max A few more images, and .lxf and .io files available on bricksafe. https://drive.google.com/file/d/1XCdn9qIAc-kskz-6HoapZjxRXMcUALHg/view?usp=drivesdk Instructions available here This was a 42077 mod I made to use 4 buwizz motors. It reached 19.1 km/h, with offroad tires. But because it didnt have caster angle, and probably a few other things like the ride height, it was too unstable to drive safely. It was fast and fun, but ultimately a failure as it wouldn't go where you tried to make it go. Because of this, I decided to mark the project as a failure and not make a video.

Not sure, I think I'll try plain silicone first. If it's not strong enough then I'll try add cornflour. Casting polyurethane is interesting, I'd like to hear how that goes.

I wonder why it wasnt going up the slope

Hah, maybe. We're going wider first, same dimensions as the new slicks. After that I will know if the concept works and designing other tires will be even more straightforward.

Behhh it didnt really work that good though. I tried to do some climbing angle tests tonight and was thoroughly disappointed at the strength of the knob gears in the rear. It needed more reinforcement. Anyway, hope you can join us next time!

I'm experimenting with making my own custom tires for lego. I'm starting with slicks. PLA print of a prototype for the size and look of the tire. Its too small around where it should interact with the rim. 3-part 3d printed mold for the slicks. I revised the central part so it now consists of 3 parts, so that the area the tire interacts with the rim with is a bit larger, and so the tires main wall isn't so thick. That part is printing now, and I can switch back to the old part if this proves to make the tire too weak. I can send all the 3d files on request. As for the tires material, I'm going to try first black silicone, probably with cornflour mixed in to increase the hardness. If that doesn't work, I may try black latex. Any thoughts, comments, or suggestions would be appreciated. Also, if this is not the right topic, I can move this somewhere else.

Yeah, they spin really freely, so they could work as they do in that model. We'll pretend I thought about that :)

And with that, I think im done!

I put a great big truck bed on the back. Now I just need to do something with the sides and im happy to call it done. Thanks everyone for the support!

https://bricksafe.com/files/Aurorasaurus/miscellaneous/20240310_120914.mp4 Still not sure if I actually like it, but there's something coming along here.

Struggling with motivation for a bodywork. I want to do something similar to the warthog from halo, but I cant get the windshield anywhere close to good.

Now, the keen eyed among you may notice the high gear wasn't used in this video. It does work, its just not as good offroad. Still works though! And sorry for the awful video quality.

Honestly, I think the senna or the F1 are more iconic cars. I'd prefer to see a senna in the right colors to some new car. But a purple artura would be cool purely for the purple panels.

Here's where I stop for the daytime, perhaps I'll work on it some more in the evening. I'm considering swapping to RC tires, then I can use the defender mudguards on the bodywork.

I reinforced the knob gears a bit more, forcing them to always be at the right angle with the suspension, and that seems to have solved the problem. As for permanentlu locked daytona diffs, a while back I 3d printed something with the same gear shape as the daytona diff to use if I ever needed that, but unfortunately I would need to make monstrous adjustments for it to work here. Thanks for the praise!

Test drive done, I've got high resistance from the knob gears, but all seems well aside from that. I'm debating swapping to regular gears or not. On one hand they have far less resistance, but on the other hand even when reinforced perfectly they're still prone to skip under such high loads as I'm using them in. Any suggestions are welcome! As for performance, its decently quick in high gear and pretty powerful in low gear, and not slow by any means.

Rear axles done, gonna reinforce some more and add buwizz units, then test drive. Thanks! Yours is looking good so far too, I dont think I could have come up with that steering. Keep up the good work!