Zero's workshop

[1gor]

2 hours ago, 2GodBDGlory said:

I'd assume that you'd get more total power output out of four XL motors, but that would be harder to find space for, and in my experience, there are very few options to hard-couple four XL motors together without breaking parts!

I agree with you completely; I have problem even to fit 2 hard coupled XL motors...and 2 XL motors are my limit...when I add 2 servos (on another) receiver then one does not work...

...I hope Jernej that I did't derail your topic to much...

[Zerobricks]

No worries. As stated in video, I plan to upgrade motors to BuWizz ones and thereby get rid of at least 9 gears, reduce weight and increase power.

Also, found some time to create a picture of the driveline:

And the steering system:

 

 

[gyenesvi]

1 hour ago, Zerobricks said:

Also, found some time to create a picture of the driveline:

That's a neat model, and interesting driveline, I like your solution for the power to the swingarms problem using the CV joint. Are the axles 15 wide in total?

Also, you crammed a lot in there with all the steered axles and the working steering wheel and fake engine! Is the single servo powerful enough to steer all axles when on obstacles?

1 hour ago, Zerobricks said:

No worries. As stated in video, I plan to upgrade motors to BuWizz ones and thereby get rid of at least 9 gears, reduce weight and increase power.

That will be a serious contender for the truck trial :)

[Zerobricks]

2 hours ago, gyenesvi said:

That's a neat model, and interesting driveline, I like your solution for the power to the swingarms problem using the CV joint. Are the axles 15 wide in total?

Also, you crammed a lot in there with all the steered axles and the working steering wheel and fake engine! Is the single servo powerful enough to steer all axles when on obstacles?

Axle width is 2 studs wider than zetros, so yes, 15 studs.

Yes, the servo can steer all of them with ease thanks to the very long steering arms, you can see it steer under very high load at 9:30.

[gyenesvi]

46 minutes ago, Zerobricks said:

Axle width is 2 studs wider than zetros, so yes, 15 studs.

The Zetros is 15 studs wide as well.

Quote

Yes, the servo can steer all of them with ease thanks to the very long steering arms, you can see it steer under very high load at 9:30.

Yeah, those long arms do help I guess :)

[Zerobricks]

Hope everyone had nice holidays and wish you all the best in the upcoming year!

I found some time today to record and edit another model I built for the 2024 Rolug Challenge.

Basically the rules stated to build a pickup truck using 62.4 tires powered by a maximum of 2 L motors. After thinking of many different brands including Toyota Hilux, Suzuki Jimny and Hummer H1, I decided on a Hummer EV for the following reasons:

• The real car is big... Like seriously massive, which gave me well needed space, especially the width
• Real deal uses independent suspension on all wheels, which i really wanted to replicate at this scale
• All wheel steering which is a rare, yet really useful feature
• It's electric, so I didn't have to cram in a fake engine

Next I calculated the scale by dividing the size of the wheels to the 62.4 LEGO ones and rounding it to 1:14.

Afterwards I took some time to find a 3D model online, modify it in Blender to remove doors one one side and importing it to LDD. While the import was not perfect due to some random flipped nromals, it was good enough to be used as a reference.

Agter a ew days of building in LDD, I came up with the following features and functions:

• Accurate 1:14 representation of a Hummer EV Pickup
• All wheel drive- Drive powered by 2 Power Functions L motors
• All wheel steering powered by a Powered Up L motor with different steering angles
• Powered and controlled by a BuWizz 3.0
• Independent suspension on all wheels
• Working steering wheel
• Openable doors, tailgate and bonnet
• Detailed interior with seats, bench and center console
• Very stiff and robust chassis design
• Final version is built out of 1431 parts
• Measures 39 x 16 x 14,5 cm
• Weight of just over 1 kg

Here's how the finished digital model looks like using the 3D reference:

And without the reference:

I am really proud of the suspension system which uses the 5 studded double headed CV joints, 5L and 6L suspension arms and old, hubs:

Finally it was time to build the real one, and isn't she a beauty:

I'm really proud how spacious and clean the bed is in the back, you can fit a lot of stuff there:

Photo with everything opened up:

And the underside. Notice the 16L drive axle going through a 5x11 panel, powering the FWD:

And of course here's a video showinf the model in action:

Finally you can download the LDD file here:

https://bricksafe.com/files/Zblj/114-lego-hummer-ev/Hummer EV.lxf

LDD upgrade guide:

To wrap it up, I'm really happy how well it turned out. Even though it's a big, chonky boy, the performance is really good due to the simple driveline and thanks to AWS it's actually quite nimble. The only bad side I'd say is the use of no longer used parts and the slightly exposed drive gears.

P.S. Would this post be better as a standalone topic?

Edited January 9 by Zerobricks

[gyenesvi]

Really cool model! I like how clean and smooth all the paneling is, and also that it has a complete and clean interior! Nice simple electronics layout, and the battery at the front under the hood is a neat idea, keeping even the bed clean! This is a great scale for building RC models.

I wonder if a 2-speed gearbox could fit in there somehow without compromising the interior :)

Also, I like the use of the CV joint for all wheel drive, the only thing I don't quite understand is why you used the 6L steering arm at the top? Is it just that it had a better shape for mounting? Or to act as a stopper?

[2GodBDGlory]

Very nice indeed! Such smooth paneling. That is a fun usage of the 16L axle!

I'm currently living in an apartment right across the road from a GMC dealer, so when I was watching the video on YouTube last night, all I had to do was look up to see a real-world GMC Hummer EV! (Though this one was the SUV version) out the window!

[jorgeopesi]

Very cool MOC, it is faster than I thought so it seems fun to play with.

[Zerobricks]

3 hours ago, gyenesvi said:

Also, I like the use of the CV joint for all wheel drive, the only thing I don't quite understand is why you used the 6L steering arm at the top? Is it just that it had a better shape for mounting? Or to act as a stopper?

Because a 5L suspension arm would colide with the CV joint.

Thanks to everyone for the praise.

[NV Lego technic]

What about the bottom?

[Zerobricks]

Just now, NV Lego technic said:

What about the bottom?

It does not colide, because the bottom arm moves away from the CV joint.

[gyenesvi]

4 hours ago, Zerobricks said:

Because a 5L suspension arm would colide with the CV joint.

Oh, true, I did not think about that.

[Zerobricks]

On 1/11/2025 at 12:38 AM, gyenesvi said:

Oh, true, I did not think about that.

Of course now with the upcoming 3L suspension arm, smaller suspension setups will open up even more.