Rollwagen no. 28 of the Plettenberger Kleinbahn in 1/22.5 scale

[Ray Dunakin]

A very clever solution!

[lab-dad]

What a great solution!

Are you casting them or is a vendor doing the casting? metal I assume?

-Marty

[Hydrostat]

Thanks, Guys,

What a great solution!

Are you casting them or is a vendor doing the casting? metal I assume?

-Marty

I'll have them brass or nickel silver casted by a vendor. My (meanwhile somewhat older)  provider said that he was able to cast parts down to 0.6 mm diameter (which means that he's got difficulties waxing thinner parts). The splint diameter is 0.5 mm and so the single bent parts are 0.5 high and about 0.2 wide. We'll see  .

Does anybody know a provider for smaller diameters? Would be very interesting.

Volker

[1-32]

volker
great split pins-great detail
regards kim

[Chuck Doan]

Nice!

[Hydrostat]

Hi,

I'm still waiting for the cast parts, so let's have a brief look at the state of affairs:





9 of 11 frames are soldered to their base plates and the bogie crossmembers. 6 bogies are mounted. Next were the buffer cages with their cover lids, which are etched from 0.2 mm brass. The cages are milled from 1 mm brass by Frithjof; I had to anneal them before bending to avoid breakage. Right hand are the uncleaned soldered parts, equipped with screw imitations.





This time I was able to use the RSU with good results. First I filled the channeling with solder and then applied the lids, which was easy because of the pre drilled holes for the screw imitations. For soldering I fixed them with
a hair clip.








The crossmembers claimed abit more sophistication. I constructed a jig and Frithjof milled its parts from Aluminum and Pertinax. There are 1 mm wide slots in front and behind of the aluminum blocks (likewise at their sides), which provide exact positioning using some inserted aluminum plates. Again I had good results with the RSU. The aluminum blocks prevent the Pertinax plate from heat attrition. The bubbles are the result of my first attempt with a flambé torch.





The parts will be mounted after final paint but that's how they belong to each other. Or so.




Cheers,
Volker

[lab-dad]

BREATHTAKING!!!!

Marty

[Allan G]

I keep returning to this project and review each page in disbelief. INCREDIBLE!!!! Allan

[finescalerr]

Yes. Once again I find myself reeling in stunned disbelief. -- Russ

[5thwheel]

Absolutely consistent beautiful looking work. I have missed something along the line, what is RSU?

[Design-HSB]

what is RSU?

Hi Bill, RSU = Resistor soldering unit.

I also just finished small parts for the "Rollwagen" and think Volker will I imagine shortly under the construction progress.

[Hydrostat]

Thanks, guys.

Absolutely consistent beautiful looking work. I have missed something along the line, what is RSU?

Bill, it's a resistance soldering unit. My experience with it was that it doesn't suit for steel parts and rather big areas / thick diameters. But with the 0.5 mm components of the crossmembers or the 0.2 mm lids at the cages it works very good. I have both a carbon electrode with an additional terminal and a tweezer, which you can see in two of the pictures soldering the cage. The crossmembers were soldered with the carbon electrode.

Volker

[Lawton Maner]

What kind of milling centre do you have to produce those intricate parts?

[Hydrostat]

None! I'm a kitchen table tinkerer. My friend Frithjof (it's the 'Feldbahnmodule with ship' guy; see http://www.finescalerr.com/smf/index.php?topic=1424.0) mills all the parts based on my CAD.

[Hydrostat]

Hi,

a shipment with some spindle parts arrived yesterday. Those are for the brake shoes, but the spindle nuts are still missing. They'll be made out of a milled brass part and a short silver steel rod, which is brazed into the milled part. Subsequently the threads are going to be cut, but I'll show that on occasion. The spindles have M2 x 0,25 threads and I'd let a precision workshop make them.








These are the spindles for the brake:








That's what they looked like before I treated them with Gravoxide and water  :








I used a simple jig for brazing the rods to the cast brass handwheels. For those rather small parts I like to use brazing paste which one can easily dispense.





Cheers,
Volker