Technic Generic WIP / Proof of Concept Topic

[Lixander]

7 minutes ago, Aurorasaurus said:

No worries :D

Some things I'd warn about with a system like this: 4 or 6 motors already provides plenty of torque. But also, using the fast output and gearing for more torque will get you a lower speed than the slow output. The internal ratio of the buggy motors is 17:23, 1:1.352. With lego gears that I assume one might use, you can get 20:28, 1:1.4, or 12:20, 1:1.66. So both times you're slower than the slow output, the torque gain is marginal and unnecessary, and the extra complexity from these gearings adds another failure point. I dont think they brace as nicely as 28:28. 20:28 certainly doesnt, and 12:20 does, but the pieces are physically too weak to deal with the power 2 motors.

However, thinking like this might be wrong, If you're able, doing things is the best way to learn, IMO. So go, try push that magic pole a little further. Best of luck.

I understand.

I will think about it. One thing is sure though: the model needs more power (so more work).

[Aurorasaurus]

On 3/31/2024 at 11:22 PM, Aurorasaurus said:

In other news, I used literally every single one of my olive green liftarms...

Not sure if I'll build a chassis for this, though I did make sure it was wide enough to accommodate diff locks with independent suspension, so maybe you'll see some updates on this soon.

4 PF L motors for drive, 1 PF L motor for pneumatic diff locks, 1 PF servo for steering. Its fairly quick for what it is, an offroader, but I dont like it much. It also has awful approach and depart angles, I placed it on that rock. But it can climb 45 degrees no problem. If anyone wants more photos in the next day or two I will probably still have the model assembled.

Edited April 2, 2024 by Aurorasaurus
rephrase to make more sense

[gyenesvi]

14 hours ago, Aurorasaurus said:

If anyone wants more photos in the next day or two I will probably still have the model assembled.

What kind of car is that going to be?

Are those Audi tires on the pictures, or something RC?

[Aurorasaurus]

3 hours ago, gyenesvi said:

What kind of car is that going to be?

Are those Audi tires on the pictures, or something RC?

Honestly, its an excuse to use olive green parts. And yep, audi tires. I might mess around with putting one on the hood and one on the roof later too, if it looks good I'll send a photo

[msk6003]

I thought build this 6 month before and finished 2 days before but to scary to use now. Maybe I will use it after finish my 8479 studless?

And still need to attach motor on here.

[Aurorasaurus]

5 hours ago, msk6003 said:

I thought build this 6 month before and finished 2 days before but to scary to use now. Maybe I will use it after finish my 8479 studless?

And still need to attach motor on here.

Is it a really complicated winch? Whats the big custom track for?

Edited April 3, 2024 by Aurorasaurus

[msk6003]

11 hours ago, Aurorasaurus said:

Is it a really complicated winch? Whats the big custom track for?

It's not a winch or custom track, it's a ring that tightens inward.

Side on the picture is outside.

Edited April 4, 2024 by msk6003

[Aurorasaurus]

Well, I finally built a bodywork I don't absolutely hate for my 26km/h car:

So while I don't actively despise it, looking at it from above is not pleasant. But at this point I'm just happy to have not torn the rear suspension apart and turned it into a trophy truck. I suppose that'll be next. It doesn't need the rubber bands on the suspension, but I like the extra bounce they give it.

Any thoughts, comments, suggestions, are most welcome and appreciated.

[Krxlion]

2 hours ago, Aurorasaurus said:

Well, I finally built a bodywork I don't absolutely hate for my 26km/h car:

So while I don't actively despise it, looking at it from above is not pleasant. But at this point I'm just happy to have not torn the rear suspension apart and turned it into a trophy truck. I suppose that'll be next. It doesn't need the rubber bands on the suspension, but I like the extra bounce they give it.

Any thoughts, comments, suggestions, are most welcome and appreciated.

Nice job here @Aurorasaurus. If it is a speed breaker, I would suggest checking different tires. Those rubber 3rd party ones are heavier than Legos. Of course, for a potential speed breaker run, I would suggest removing the spare tire. :D Other than that it looks like it has the own style and on top of that it should be robust enough to handle any stress, good job.

[Aurorasaurus]

4 hours ago, Krxlion said:

Nice job here @Aurorasaurus. If it is a speed breaker, I would suggest checking different tires. Those rubber 3rd party ones are heavier than Legos. Of course, for a potential speed breaker run, I would suggest removing the spare tire. :D Other than that it looks like it has the own style and on top of that it should be robust enough to handle any stress, good job.

Its hardly a world record breaker lol, the buwizz team got 60km/h...

As for the weight of the tires, in my hands they feel lighter than the same diameter lego ones. They're from a chinese manufacturer called "Injora" if anyone's curious, I found them at a great bargain on aliexpress. Anyway, thanks for the praise!

[msk6003]

On 4/4/2024 at 5:41 AM, Aurorasaurus said:

Is it a really complicated winch? Whats the big custom track for?

It works like this.

 

[Aurorasaurus]

So, my most recent endeavor has been an AWD trophy truck, inspired by Madoca1977's trophy truck. This build only stayed assembled for 2 days, because I wasn't satisfied with the handling.

 

[Alex Ilea]

It looks awesome in dark blue!

[Carsten Svendsen]

I'm not working on this, but thought about something else than cars. Everything on this site is just cars these past few years...
I worked on creating a fluid tail like motion for an animatronic sculpture, but never got anywhere with it. Maybe someone feels like a challenge?

 

[pleegwat]

My first thought on tails is towards the 8485 t-rex model.

[SAM_KTM_304]

On 4/28/2024 at 4:51 PM, Aurorasaurus said:

So, my most recent endeavor has been an AWD trophy truck, inspired by Madoca1977's trophy truck. This build only stayed assembled for 2 days, because I wasn't satisfied with the handling.

 

This is amazing. I have built a trophy truck/Ultra 4 

[Aurorasaurus]

5 hours ago, SAM_KTM_304 said:

This is amazing. I have built a trophy truck/Ultra 4 

You have my interest, could you share some photos here? I think this is a fitting topic.

[Fluwoeb]

I am currently working on building a Lego chassis for a completely true RC-powered vehicle. I am using TF-engineering wheel hubs, some bearings that fit over lego axles, and 3D-printed parts (some which I designed) such as O-frames for the bearings and an adapter from the motor spindle to Lego axles. The goal of those parts is to avoid as much friction in the drivetrain as possible while maintaining the (mostly) Lego characteristics of the rest of the build. I was spending a lot of time on the front axle, which is very complicated. I will just describe it here and post pictures later this week after I get past my finals for school. The front axle has independent suspension, Ackerman steering geometry, drive (using the Audi E-Tron set cv joints and the Ferrari differentials), and most important of all... virtual pivot steering.  It doesn't have great suspension travel (about 3 studs) but it will work. I currently have 4 normal 6.5L shock absorbers for each wheel. 

[Timewhatistime]

On 4/11/2024 at 10:52 AM, msk6003 said:

It works like this.

 

Interesting... what is its purpose or the intended effect?

On 4/29/2024 at 9:39 PM, Carsten Svendsen said:

I'm not working on this, but thought about something else than cars. Everything on this site is just cars these past few years...
I worked on creating a fluid tail like motion for an animatronic sculpture, but never got anywhere with it. Maybe someone feels like a challenge?

 

This is a very nice and satisfying motion, though I don't have any idea to make use if it. Hope, someone else will...

[msk6003]

15 hours ago, Timewhatistime said:

Interesting... what is its purpose or the intended effect?

Do you know background story of that BGM? YOASOBI - Racing Into The Night

[Jim]

On 4/11/2024 at 10:52 AM, msk6003 said:

It works like this.

What is the purpose of this device? Looks dangerous.

[Timewhatistime]

On 5/1/2024 at 1:58 PM, msk6003 said:

Do you know background story of that BGM? YOASOBI - Racing Into The Night

No, I don't have any clue... 

[msk6003]

Clock escapement using new micro panel
I thought this when TLG released that parts. Final model is little different with my original thought but it works very well.

Edited May 4, 2024 by msk6003

[icekusbe]

I built this experimental tractor chassis where the right and the left rear wheels are driven independently so that the tractor could steer even when the front axle does not touch the ground. Then the average of the R/L turning speeds (=the turning speed of the differential) is transmitted to the front axle through appropriate gearing.
The rear tires are mounted on the old 56 tooth turntables with 4:1 planetary gearing inside. In the pic of the bottom you can see the tan 20 tooth double bevel gears, which have 12 tooth small bevel gears driving them. Finally, there are the PU controls which I built with a very heuristic approach, but they seem to work both in forward and reverse driving.

This was a very quick (3-hour) build, and I probably won't make this into a finished model, as the driving motors placed vertically would make it quite ugly.

[Jim]

On 5/1/2024 at 1:58 PM, msk6003 said:

Do you know background story of that BGM? YOASOBI - Racing Into The Night

Nope. Please enlighten us.