[MOC] Midi-scale Pneumatic Crane Truck

[D3K]

As promised in the white excavator topic last month, here is a closer look at the red four axle truck from that topic.

The trailer is nothing special, just thrown together for the fun of it.

Now let's unload that loader and have a closer look at the truck!

Key features:

-Pneumatic crane boom raising

-Pneumatic crane jib lifting

-Manual crane jib extending

-Manual crane winch

-Mechanical crane rotation

-Pneumatic dumping of bed

-Tilting cabin

-Proportional steering with Ackerman geometry and good pivot point (more details later)

-Manual outriggers

-Bed walls can be lowered

As you can see, the outriggers are of an extremely simple design. Their geometry and the way they are stored is pretty accurate to real life, but they are entirely manual, not very strong, and there mostly for looks rather than function. At this scale, to make something mechanical or pneumatic that actually works, would have taken way too much space.

I tried to make a detailed equipment tower, with an ACU, some tools and some storage compartments etc.

The bed is dumped with a normal pneumatic cylinder.

It also has the ability to dump sideways, by sliding a mechanical switch that frees the bed on the rear right hand side, while at the same time locks it for rotation around a point on the front left-hand side:

The red parts in the above picture are part of the switching mechanism to from rear tipping to side tipping.

The cabin tilts to reveal, well, not very much really. Due to the steering setup, I had to ditch the fake engine I originally had mounted. As you might spot, I had to use the old stye 14 tooth bevel gears for the steering. This because I used the older style 8L gear racks, and for the gears to mesh properly, this was the best solution.

Last picture show the steering setup. While it provides a very good pivot point and fairly good Ackerman geometry, it is not as rigid as a more standardized solution. But I prioritized a good pivot point to keep the aesthetics of the wheel arches as nice as possible.

Again, I reccomend taking a look in the appropriate Bricksafe folder for higher resoution more detailed images.

Hope you like it!

[MajklSpajkl]

This is really packed, I'm in awe! I like two way tipping very much. So you have to move two levers to change sides or just one? The details on and behind the cab are fabulous!

[sm1995]

Simply stunning. Love the cab, love the features and love the small scale. One of the nicest MOCs I've seen this year.

[Pat-Ard]

this is so great!!!

[AndyCW]

I saw the first pic and thought it was built with 62.4mm tires and then I realized it was on a smaller scale. The scale of the MOC is what makes it so interesting.

v/r

Andy

[Appie]

Excellent model! I love how much functions you put in this scale and still had room to add cool details, like the equipment tower. Also love the outriggers, simple and looks good.

[Freekysch]

Great model, it is just like a mini 8258, but better

[jorgeopesi]

Awesome in a small package .

[Rishab N]

Looks great. You managed to squeeze some good functions in there

[legolijntje]

That truck is so cute.

Really nice work of combining the small scale with good looks and lots of functionality. I really like it a lot

Personally, I find the truck much better than the small Swingloader.

[Jeroen Ottens]

Great small truck :)

I love the double pivot tipping bed. More details of that mechanism are much appreciated

[zux]

So small, yet so big! I cannot imagine how you found out how to pack all the functions in such scale.

[Erik Leppen]

This is amazing. The double-acting bed and the crane are brilliant pieces of engineering. I also love your steering mechanism. Would you mind if I'd use that on my [TC7] Enforcer?

[lcvisser]

This is great! So many functions and details in such a small scale. Thanks very much for posting it.

[GoldVillage]

very good job! nice to see this kinda trucks in a more modest size since they usually are in a world of giants ;)

[L3gonut]

Like it!

[D3K]

Thank you all, I am really glad you like it! I am quite overwhelmed with all the positive comments, wasn't really expecting that!

This is really packed, I'm in awe! I like two way tipping very much. So you have to move two levers to change sides or just one? The details on and behind the cab are fabulous!

It's one sliding switch.

I am quite happy with how the equipment tower turned out, sorry there isn't a better picture of it

Great small truck :)

I love the double pivot tipping bed. More details of that mechanism are much appreciated

Thanks! I'll make a 3D model of the mechanism to give a better understanding.. it really is a very simple design. The other key factor is how the cylinder is attached, to allow it to move the bed in both directions.

This is amazing. The double-acting bed and the crane are brilliant pieces of engineering. I also love your steering mechanism. Would you mind if I'd use that on my [TC7] Enforcer?

Thanks a lot! And of course I wouldn't mind, go right ahead. But like I said, it's not very rigid, and provides somewhat more "sag" in the model than a more solid solution

[KirTech LAB]

That's incredible scale!! So compact and so functional. Oh, and so beautiful!

[Graydingo]

incredible build! Would love to build this one.

[D3K]

I have finished an LDraw model of this truck, that can be downloaded here for anyone interested.

And some quick (LDcad) renders of the internals:

Higher resolution renders can be found in the appropriate Bricksafe folder

[Alasdair Ryan]

I like this truck a lot,you have made nice job packing all of those functions into such a small moc.

The body works is good too.

[750ACE]

This is probably one of your best moc's. Great functions and styling in a small scale. Very nice!

[Sylvian]

I really like it. And awesome playability.

[tehkei]

I like it! very cool.