I never disassemble any of my official LEGO sets - I love them too much, especially the big and expensive stuff like the LEGO Technic flagships.

i build them play whit it MOD them and then take them apart to use them in MOC's and MOD's

Look at video at time 2:43, there is probably L6 located between battery box and turntable.So everything is OK

Spent 5 minutes of counting studs at several frames. And the conclusion is: 99% inline 6

Edited February 2, 201510 yr by rm8

so the engine is V6? Nice!

I never disassemble any of my official LEGO sets - I love them too much, especially the big and expensive stuff like the LEGO Technic flagships.

I don't like to disassemble either. I think I got rid of the crane and a couple other parts because I wanted the pneumatics

so the engine is V6? Nice!

Not V6 but L6 :-) .Yeah this great, I think that L4 cannot be accepted by Mercedes.

Hello

I really like this set but i have noticed something.As you can see in the photos below the Arocs which is in a stand and it is turning around the thin pneumatic cylinder has a yellow ending.The other Arocs which they are showing the functions has a black ending.

Sorry for my english.

Not V6 but L6 :-) .Yeah this great, I think that L4 cannot be accepted by Mercedes.

Ah of course :) This set is getting better and better.

Ah of course :) This set is getting better and better.

Now everything, that I want to know is confirmed so definitely cannot wait to purchase it!

Now everything, that I want to know is confirmed so definitely cannot wait to purchase it!

Building this will be a blast, can't wait!

Going to have to buy multiple copies. Try and keep one misb

Any idea on the length of this beast? How big (size) will it be compared to other LEGO Technic trucks (8285, 8109, 8258)?

Cylinders: consider the scale size of the piston and the spacing between them; what does 16mm represent at this scale, where 62mm wheels represent truck wheels? This would dictate whether the full 6 cylinders could be implemented in the model. Cars would have a bigger problem with this. It is quite possible that LEGO Technic cylinder blocks are suitable for ship engines. However, these parts are an improvement over the original 2x2 rounded blocks, which would represent even larger cylinders!

I have robbed my built Unimog of its compressor. I originally added the parts from the 2nd Unimog to add the snow plough to the first.

A single LA to raise the tipper seems weak if it were ever filled with LEGO plates. I expected 2x LAs but I'm all for reducing LAs in favour of pneumatics

Whilst adding an air tank or boring out the holes on the cylinders (careful you don't damage the seal whilst doing the top one) might increase the performance of the pneumatic system, its application in this truck crane really needs it to move slowly like the real hydraulic crane. Higher pressure or reduced restriction would allow faster air flows but that would move the cylinders quickly to their full travel, with only the hand movement of the switch valves limiting the air flow rate. This would defeat the object of replicating a hydraulic crane. You have to pick your applications - modded cylinders for 2-state logic circuits and pneumatic engines; unmodded cylinders for replicating hydraulic systems.

What does the small cylinder do on the crane of the B model? Does it release a pin so that the entire triangular arrangement of 6L yellow liftarms and grey curved panels can be set down?

As much as I'd want to see one, I'm doubtful I'll get to see a Lego Variable Volume pump (with a swash plate) during my lifetime.

The complexity of such component, with barrel and pistons, and the bronze port plate (with kidney shaped openings) are way beyond Lego, and even if made in plastic, not sure they'll sustain the test of time (durability ought to be very poor). That said, I would definitely welcome an air pump that is a bit more efficient than the current reciprocating cylinder.

Rambling a bit more: Can you imagine a VV Pump with Load-sense? i.e., that the swash plate destrokes automatically when the load gets too high? Such component, based on the one you have on your brickshelf, would be awesome to run 'air-power logic circuits' with. One can only dream.

I dream, and make quite a few things "because I can"

My swash plate pump can vary the swash angle and hence the piston stroke and volume. This is the nearest that can be done in LEGO because a real one (e.g. small 1960s jet engine fuel pump or early 1990s diesel car engine injector pump) often has the fluid surrounding the mechanism for cooling and lubrication. In the model the turntables have rather a lot of friction that loads the XL Motor. I might give it an update with the new 60T turntables from a couple of Arocs trucks in due course as these are likely to have lower friction.

I also did a variable-stroke pump with 4x 5.5L compressors and 2x RC car motors that doesn't need turntables and does have a faster compression (no pics yet). This means the motors can have a rest at low stroke; they don't like to run under high load for long. All I have to do is add a feedback mechanism like this one to the swash plate or stroke lever - pressure vs elasticity to set the stroke.

Mark

Any idea on the length of this beast?

Why do you ask? You can simply count the studs ;)

Anyhow, looking at the wheel setup it looks a tiny bit longer than 8258.

Cylinders: consider the scale size of the piston and the spacing between them; what does 16mm represent at this scale, where 62mm wheels represent truck wheels? This would dictate whether the full 6 cylinders could be implemented in the model. Cars would have a bigger problem with this. It is quite possible that LEGO Technic cylinder blocks are suitable for ship engines. However, these parts are an improvement over the original 2x2 rounded blocks, which would represent even larger cylinders!

I have robbed my built Unimog of its compressor. I originally added the parts from the 2nd Unimog to add the snow plough to the first.

A single LA to raise the tipper seems weak if it were ever filled with LEGO plates. I expected 2x LAs but I'm all for reducing LAs in favour of pneumatics

Whilst adding an air tank or boring out the holes on the cylinders (careful you don't damage the seal whilst doing the top one) might increase the performance of the pneumatic system, its application in this truck crane really needs it to move slowly like the real hydraulic crane. Higher pressure or reduced restriction would allow faster air flows but that would move the cylinders quickly to their full travel, with only the hand movement of the switch valves limiting the air flow rate. This would defeat the object of replicating a hydraulic crane. You have to pick your applications - modded cylinders for 2-state logic circuits and pneumatic engines; unmodded cylinders for replicating hydraulic systems.

What does the small cylinder do on the crane of the B model? Does it release a pin so that the entire triangular arrangement of 6L yellow liftarms and grey curved panels can be set down?

I dream, and make quite a few things "because I can"

My swash plate pump can vary the swash angle and hence the piston stroke and volume. This is the nearest that can be done in LEGO because a real one (e.g. small 1960s jet engine fuel pump or early 1990s diesel car engine injector pump) often has the fluid surrounding the mechanism for cooling and lubrication. In the model the turntables have rather a lot of friction that loads the XL Motor. I might give it an update with the new 60T turntables from a couple of Arocs trucks in due course as these are likely to have lower friction.

I also did a variable-stroke pump with 4x 5.5L compressors and 2x RC car motors that doesn't need turntables and does have a faster compression (no pics yet). This means the motors can have a rest at low stroke; they don't like to run under high load for long. All I have to do is add a feedback mechanism like this one to the swash plate or stroke lever - pressure vs elasticity to set the stroke.

Mark

What Can lift the heaviest load for tipping the bed, two pneumatic cylinders, or two LAs with XL motor?

(Guessing the clutch in LA is the weakest point)

i think the LA because the pneumatic hoses would come of the cillinders

I was surprised to see just one large LA for tipping. I was hoping that there might be two of them. The tipper has a lot of leverage over its length, when compared to the position of the LA to the pivot. The LA seems to be geared down enough, but whether it could tip a load full of Lego bricks, without the clutch slipping remains to be seen. If there were 2 of them, then the load is halved between them.

i think the LA because the pneumatic hoses would come of the cillinders

Check youtobe! Pneumatic is stronger in somw cases!

Looking closely at them long pneumatic cylinders, it looks like the black piece at the top of the silver ram is slightly bigger in diameter than the silver piece, which might suggest that part of the black piece might not go inside the ram like the older double acting ones did. This part of the ram could still be in prototype stage though as its colour is different in each truck.

Does anyone know the fully extended length of these new longer rams? It looks like its closed length could be 11L, but what could its open length be? 16L?

Yep - looking at the video that is 3:58 / 3:59 long and playing / stopping it from 2:36 to 2:40 - you can see the last of the cyclinders in under the turntable. Counting the studs back, it sure looks like a straight 6 to me!

Is that a new DBG cog / collar piece at the front of the engine?

Can someone guess what the new Pneumatics V2 mean?

In the Video was mentioned to make movement more smooth, so how that?

Is the airflow different like other Diameter of Cylinderinlet or maybee the tolerances of the Sealings are thigtened so more preassure is needed.

Any Idea...

Look at the cilinder sizes: they are bigger. So Lego says pneumatic V2.

my 8421 is cowering in the corner....

Look at the cilinder sizes: they are bigger. So Lego says pneumatic V2.

Thats not what i mean. I know they are longer and that we get a 2 and a 1 wide new Cylinder.

What I´m refering to is, what that guy on the Toy fair is telling... it works smother.. or someting like this.

You also can see that the arm is moving quite slow or you alos could say more controlled.

By the way: wen you add an old red 9V micro motor to the crane, you can turn the grabber / hooi / pallet fors / etc. Like in real life!

Can someone guess what the new Pneumatics V2 mean?

In the Video was mentioned to make movement more smooth, so how that?

Is the airflow different like other Diameter of Cylinderinlet or maybee the tolerances of the Sealings are thigtened so more preassure is needed.

Any Idea...

I would guess that's only due to the fact the new cylinder's have larger volume (are longer), so it means they do not fill up so suddenly with air, but rather extend and retract more gracefully. I would love it if they had figured out way to reduce static friction, especially for 1-wide cylinders.

I don't think they have changed tubes/inlets/switches/pumps for this.