Feldbahnmodule with ship

[finescalerr]

Beyond comprehension. -- Russ

[fspg2]

It continues with the substructure of the harbor crane.

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When I played on this sand piles as a child, never I had dreamed that I would count the rivets on this crane, many years later.


The following snippet I placed as a background photo under the drawing...

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... and the side wall was modeled rivet for rivets.


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The cutter got this DXF file ...


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... and I received a few nickel silver plates in which I have to press a few hundred rivets now.   

[finescalerr]

I already can visualize the result. Wonderful. -- Russ

[fspg2]

The upper and lower rivet band should be soldered right-angeld. So I have built a new gauge. This time it is not milled but sawed.
The rivet band is 0.5 mm thick, the rivets wear out to 0.65 mm. So the slots were cut with a 0.5 mm circular saw blade on my Böhler saw with different depths. Then the rivet bands were inserted vertically.
With the help of soldering flux and solder wire (0.5 mm) the side panel have been soldered together.



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Still missing the riveted L-angle strips - with 920 rivets of 1.5 mm diameter.

Below you can get a small impression how it will look once.

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[Hauk]

That is some really sharp modelling. I look forward to every new posting on your project. A great inspiration.

Regards, Hauk

[fspg2]

@ Hauk
Thank you for your interest in my work! Today comes a short update.

As a little finger exercise for in-between a small drawing was created: the panel for the electric drive of the port crane.

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This resulted in the settlement:

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... the dxf file with different colors for the 0.5 mm drill and the two different cutters:

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... and the milling file:

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The four roof side angle I had cut after bending to measure. A 1.5 mm thick brass sheet was used as spacers for the sheet metal cutting machine. Similar to shown here.

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The result for today - folded and soldered:

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[Ray Dunakin]

Nice! A very simple structure, elegantly engineered.

[fspg2]

Thank you Ray for your nod.

The old harbor crane had a double shell type grab, which was closed and lifted with one rope only.


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On top there were two movable hooks.
The hooks grabbed over a "mushroom-formed" objekt. By pulling a second rope the gripper opened.


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Unfortunately I cant see the exact mechanism at the pictures.

Maybe someone has even a photo or drawing of just such a hook on which I can still see a few more details.


I'm in between pressing the rivets.

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[David Emery]

There are kits available for clamshell buckets, at least in HO and I think in O scale, too. 

dave

[Ray Dunakin]

I don't know if these are the same kind but I found some plans for clamshell buckets online...

http://constructionbucket.tpub.com/TM-5-3815-200-23P/TM-5-3815-200-23P0022.htm

http://constructionbucket.tpub.com/TM-5-3815-200-23P/TM-5-3815-200-23P0035.htm

You can also find a lot of photos and plans by searching "clamshell bucket" on Google Images. Here's one...

[fspg2]

@Dave, Ray,
Thank you for your tips!

Looking for photos of my favorite model of clamshell buckets I got several emails from various people with useful notes, drawings and images.

Thanks to all of you!

Most of all I have enjoyed the help of two colleagues who had made their way to the Museum of Work in Hamburg/Germany and send some pictures of just such a gripper to me.

To recreate the look I put the photos to the background.


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The 3-D drawing is the first step.  So I can build the gripper later in brass and nickel silver on a scale of 1:22.5.



Meanwhile the 4 beam supports for the roof were milled in brass of a 20mm x 8mm profile.
Since the parts are 5.5 mm thick only I have provided the profile of the back with 2.5 mm deep pockets.


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The center bars are for the fixed clamping during cutting the opposite side.


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The centrally exciting vice helps for fixing the parts correctly.

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Then I milled a 9.0 mm deep pocket into a piece of hard paper.


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The beam supports were placed in these pockets.
A 2.0 mm mill took off 0.5 mm material per each pass. In all 7,5mm he removed.

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The two side plates with hex bolt and shims were milled for test only.
They should to be formed with a distance unit block.

Now the hexagon bolts will be assembled with the washers after the soldering of the support beams into the 2mm roof .

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[fspg2]

Today it´s only a little progress with the crane.

The two doors and window frames were milled from 0.5 mm brass MS58.


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One frame shall soldered to the door. After painting a plexiglass disc will be inserted and glued with the second frame to the back of the door.

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In this interior view the upper guide rail of the door is still missing. I wanted to see how it will look like.

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[finescalerr]

It is beautiful progress. -- Russ

[Hauk]

Today it´s only a little progress with the crane.

No progress too small to be of interest!
I just love this project. A great inspiration.

Best regards,
Hauk

[marc_reusser]

Wauw!  Beautiful. That interior shot could be of the real space.