[WIP] Harbour crane- 42043 C model (Pneumatics added)

[BrickbyBrickTechnic]

@Leonard Goldstein's 42055 C model inspired this model I am building. It is not based on the same kind of crane (this will have no winch involved).

There will be several power and pneumatic functions:

-Superstructure sliding

-rotation

-boom stage 1

-boom stage 2

-tilting cab

Current State: Check this post

Here are some pictures:

Leave a comment!

BbBT

P.S I do not consider this "doppelganging" or copying. If you do, please tell me.

Edited December 30, 2017 by BrickbyBrickTechnic

[Josephiah]

This looks promising! Looking forward to seeing how the pneumatics get incorporated. 

And, no, definitely not copying, just inspiration 

[Aventador2004]

I would say good luck, I hope you complete it!

[BrickbyBrickTechnic]

5 hours ago, Josephiah said:

Looking forward to seeing how the pneumatics get incorporated. 

Mostly in the crane, but the cab will tilt via pneumatics as well.

5 hours ago, Aventador2004 said:

I would say good luck, I hope you complete it!

Thanks  so far it seems like I will!

[Leonard Goldstein]

9 hours ago, BrickbyBrickTechnic said:

@Leonard Goldstein's 42055 C model inspired this model I am building. It is not based on the same kind of crane (this will have no winch involved).

Hi @BrickbyBrickTechnic,

glad to hear that 

It looks very interesting - I am looking forward to your progress 

Regards

Leonard Goldstein

[BrickbyBrickTechnic]

Update: 

Crane time! This is an initial concept of the crane, which will act as a counterweight to the superstructure (well,most of the time at least). When the boom is at its highest position its weight positions itself on the superstructure's rear.

It also happens to be a bit big:

So that's it. Leave a comment!

[Aventador2004]

Very good, but it will tip over under weight. Where is the battery?

[Nequmodiva]

Nice progress so far!

What is the linear actuator there for? It shouldn't be necessary?

While the picture of the real crane you posted only has a single boom, it now looks more like a luffing crane like Leonard Goldstein posted. So I'm a bit unsure what your goal is. Does the front tip of the boom remain at the same height? Some years ago I wrote an article about the geometry of level luffing cranes:

[BrickbyBrickTechnic]

36 minutes ago, Nequmodiva said:

What is the linear actuator there for? It shouldn't be necessary?

While the picture of the real crane you posted only has a single boom, it now looks more like a luffing crane like Leonard Goldstein posted. So I'm a bit unsure what your goal is. Does the front tip of the boom remain at the same height?

The linear actuator will move the second stage of the boom (the DBG beams). I guess this does look like a luffing crane, though as I said, there will be no winch involved. The front tip of the boom does not remain at the same height. The pictures aren't very telling; I have done more work on this and things should be more evident tomorrow.

[1gor]

So far it looks interesting and huge... One simple wisdom - building big - big responsability; that is why I build smaller models. You have menaged to make so many C-models from your sets which leads me to one question - did you have broken or worn parts? I'm asking because my parts are worn after some 5 times used. When I see my Arocs -still assembled waiting for some company like 1:17 (same scale as Arocs) Unimog. I'll peek tomorrow on this topic to see your progress. Still thinking to make something like your airport catering truck one day

[BrickbyBrickTechnic]

1 hour ago, I_Igor said:

One simple wisdom - building big - big responsability; that is why I build smaller models. You have menaged to make so many C-models from your sets which leads me to one question - did you have broken or worn parts?

Your wisdom is understandable, but I just got 42055, and I plan on building some big, big models from it. In a way this is a good precursor. In terms of broken parts I have some broken black pins and a warped 7l axle, but that's it. 

[1gor]

3 hours ago, BrickbyBrickTechnic said:

Your wisdom is understandable, but I just got 42055, and I plan on building some big, big models from it. In a way this is a good precursor. In terms of broken parts I have some broken black pins and a warped 7l axle, but that's it. 

I usually got connectors broken or they are worned out so they often pop out of axle. Sadly you do not have another Arocs to make some container truck for crane, or would container truck based on Arocs be to big?

[Aventador2004]

A 7l axle! I warped 7 axles with a XL motor. Good work!

[BrickbyBrickTechnic]

@Nequmodiva today's update should clear things up as to how the crane is going to work. 

You can see in the below picture that the grey segment carries on and contains the attachment. Another note: the whole thing is now front heavy, so an actual counterweight is necessary. Also, I added lots of details.

You can see the pneumatics connected to the cabin:

The cab looks horrendous. I will rebuild it.

Finally, the gear shift lever (1 on each side):

That's all for day 5 of building. Thanks for watching!

[Aventador2004]

Why is the 42053 pump in a 42043 c model?

[Technivor]

6 minutes ago, Aventador2004 said:

Why is the 42053 pump in a 42043 c model?

Just for testing!

Good job on this alternative build, it's great to see how polyvalent this set is!

[Aventador2004]

15 minutes ago, Technivor said:

Just for testing!

Good job on this alternative build, it's great to see how polyvalent this set is!

I expected that, but why not use the gearbox pump too?

[Technivor]

Maybe because the battery is not yet added!

[BrickbyBrickTechnic]

40 minutes ago, Aventador2004 said:

I expected that, but why not use the gearbox pump too?

Haha, I attached after completing the pneumatic mainframe.

27 minutes ago, Technivor said:

Maybe because the battery is not yet added!

Weirdly enough, the battery was the hardest part to add. Though after 5 attempts I got it on. And you are completely right in your logic Technivor.

Edited December 28, 2017 by BrickbyBrickTechnic

[1gor]

Nice use of thin cylinder 

[BrickbyBrickTechnic]

Huge update: I finally found a place for the BB, and I added in the pneumatic mainframe. Finally, I added some more nice details.

BTW The mainframe is in the upper house which will be connected to the counterweight eventually.

These tires are the most important things on the entire crane. They act as a counterweight and are the only reason the whole crane isn't incredibly badly balanced.

And now, detail time: I've added a path to the top of the base like in my inspiration.

That's it for today. Have a great day everyone and leave a comment!

BbBT

[Aventador2004]

If that is what you need for stability, make outriggers to stop the curved wheels.

[BrickbyBrickTechnic]

On 12/28/2017 at 10:50 AM, Technivor said:

Good job on this alternative build, it's great to see how polyvalent this set is!

Thanks! I still have 1 more idea; this set is extremely polyvalent.

3 hours ago, Aventador2004 said:

If that is what you need for stability, make outriggers to stop the curved wheels.

No need for outriggers. The base structure itself will not fall over or bend but the superstructure will tilt forward or backward with load. I do think I have an idea for a removable weight system that does not need tires though, which is to change the weight on the counterweight (which is not the BB) and I will also reinforce the attachment of the superstructure to the base.

[Aventador2004]

20 hours ago, BrickbyBrickTechnic said:

No need for outriggers. The base structure itself will not fall over or bend but the superstructure will tilt forward or backward with load. I do think I have an idea for a removable weight system that does not need tires though, which is to change the weight on the counterweight (which is not the BB) and I will also reinforce the attachment of the superstructure to the base.

Really, I don't think just wheels is smart. Your choice though.

[BrickbyBrickTechnic]

34 minutes ago, Aventador2004 said:

Really, I don't think just wheels is smart. Your choice though.

Well, I am going to replace those wheels with actual cargo... because when the crane is lowered, it is tilted forward with tires but it technically shouldn't have cargo on it (so it would balance), and when the crane is raised it is tilted backward without cargo but it technically should have cargo (so it would balance). Not sure if this entirely makes sense but the point is I've found an intuitive point where balance is reached. Plus, I have now switched to a winch system of which I will post a picture soon.