Well. I thought this idea few month before but I'm to lazy so didn't make.

But this contest is perfect for this idea, so I selected to build this.

Basic idea is concrete pump car. But not normal concrete pump.

Planned function

Drive with 1 C+ L motor

Steering with 1 C+ L motor

Secret function with 1 PF L or M motor - This is a model of concrete pump truck but also can work as GBC module. Working with 1 PF M motor.

manual lifting, turning, outrigger

There is so many half stud alignment on middle section. As you can see from the bottom photo, I even used cam and engine crankshaft.

I made lower the height as much as possible, but I'm not sure if that would be okay.

Edited June 24, 2024Jun 24 by msk6003

Car? This 🐕 looks like more of a truck.

Hint of secret function

Progress update

Drive is working by 1 spike/RI medium servo(For some strange reason it still not work with powered up app)

Steering working by 1 C+ L motor

GBC working by 1 PF M motor

I planned 3 section of boom.

On 6/23/2024 at 5:14 AM, Maaboo the Witch said:

Car? This 🐕 looks like more of a truck.

Ok. I changed title.

Edited June 24, 2024Jun 24 by msk6003

I like this GBC way of representing the concrete! Makes the whole model way more playable 👍 

2 hours ago, MangaNOID said:

I like this GBC way of representing the concrete! Makes the whole model way more playable 👍 

That is original concept which I got inspired by this.

 

Nice progress.

Wow, this is amazing idea, to include GBC also.

Outrigger build

Because don't have space for place transmission system outrigger is manual. And due to ball channel, I can't place axle for lowering outrigger. So only expand is synchronised. Left and right side of lowering outrigger is independent.

And for same reason, mini LA can extend like this. There is no more place point except there.

Bonus thing - There is some storage door on both side.

Edited June 29, 2024Jun 29 by msk6003

This is looking really cool.

This is shaping up to become a real great entry, it's even better to know that it will actually work (as gbc) as well! I am following the progress with great interest! The colorscheme somewhat gives it a 42128 B-model vibe. 

Same here

Finished 3 section boom

Originally I made every section of boom is worked by linear actuator. But I remove section 1 and 3's actuator beacuse section 3's actuator is collision with top floor and entire arm is to heavy and don't have mounting point for actuator. Because it, section 3 is locked by 5L axle with stop and entire arm lifted by string with worm gear. And the arms can rotate 90 degrees to the left and right.

At least I don't have much ball, but it can loop self.

Edited July 16, 2024Jul 16 by msk6003

Wow, that is really cool, I love the video.

This is becoming quite the machine, lovely to see it all work as intended! The string for the second boom part has a heavy job to do, aren't you afraid it will suffer too much?

I finally finish cab.

Due to arm can rotate only 85~90 degree, model can work best as corner module.
And I change GBC driver motor to PF M to L. But C+ M/L is work too.

Video

 

Final function

Drive using spike medium / RI angular motor

Steering using C+ L motor

GBC using PF L motor

Openable door

Openable both side component door

Extending outrigger and arm

Edited August 25, 2024Aug 25 by msk6003

That's a serious machine for a competition of vehicles on small wheels.. 

Great job. I love the GBC addition to this MOC. Well done.

7 hours ago, gyenesvi said:

That's a serious machine for a competition of vehicles on small wheels.. 

 

7 hours ago, Thirdwigg said:

Great job. I love the GBC addition to this MOC. Well done.

Thanks!

Well, "bigger is better" they say 

In all seriousness, this is quite the machine. I actually like how different it is from all the rest, and that all of the huge size is not just bulk for nothing: it's quite the feat to have such an arm fold all the way out, and the X-shaped outriggers are really nice too. I think this is a great entry to the competition.

13 minutes ago, Erik Leppen said:

Well, "bigger is better" they say 

In all seriousness, this is quite the machine. I actually like how different it is from all the rest, and that all of the huge size is not just bulk for nothing: it's quite the feat to have such an arm fold all the way out, and the X-shaped outriggers are really nice too. I think this is a great entry to the competition.

Thanks :)

It wasn't intentional, but I have a feeling this model has the most parts out of all the entry's lol

Even I forget to build backplate and GBC ball mixer, this is still the largest MOC I've ever made.

 

Instruction will soon available on my rebrickable page soon.

Edited November 2, 2024Nov 2 by msk6003

Instruction finished
LEGO MOC Concrete pump truck GBC by msk6003 | Rebrickable - Build with LEGO