7mm Michaels odd new kit, a Prussian T18

michael080

Western Thunderer
A little progress...

IMG_20210606_173739_sml.jpg

I had to remake the slidebars 4mm longer. They are made of two silver soldered I-profiles and a little fettling. Then I noticed that the piston rods were too short, they had to be extended by 4mm too.
Originally, the whole valve gear wasn't removable. I think this is a no go given the paint scheme of German steam loco. So I organized a couple of M1 screws and made everything removeable. The union link can be removed from the crosshead, the combination lever can be removed from the valve and from the radius bar, the expansion link can be removed from the carrier bracket. Now I noticed that the whole carrier needs to be removeable from the body to allow the crosshead to be removed from the slidebar. :eek:

And I noticed that the whole thing wouldn't move because the valve rod isn't moving correctly.

I have to admit that I was close to dump the whole thing.

Let's hope that only the body is such a mess. The cast brass looks so nice that fitting them on the boiler might be fun.

Michael
 

michael080

Western Thunderer
Can you spot the reason why I couldn't get the motion running without binding? It took me a couple of days to figure out the problem. :oops:


IMG_20210630_174913_sml.jpg

No, it's not my erratic Right/Left labelling.

some more pictures as soon as I get replacement.

Michael
 

michael080

Western Thunderer
Correct!
I got two pairs of 5'1" 18 Spoke Driving Wheel (DB Class T18) with 12" throw .
The not matching pair might be a5'1 1/2"16 Spoke (NER McDonnel 0-6-0 LNER J22) with 10" throw.
I didn't check when I received them from Slaters, it's some time ago so it doesn't make much sense to complain. Anyway, the replacement pair arrived this afternoon. I will airbrush them with RAL 3002 and then we'll see.
The counterbalance weights are 3d-printed. I think this is a relatively simple example where 3d-printing can give a big improvement over the flat brass parts.
Michael
 

Steph Dale

Western Thunderer
The counterbalance weights are 3d-printed. I think this is a relatively simple example where 3d-printing can give a big improvement over the flat brass parts.

I generally agree, although I've found Milliput works well and can the made to fillet into the spokes - but its more work of course.

Steph
 

mickoo

Western Thunderer
Correct!
I got two pairs of 5'1" 18 Spoke Driving Wheel (DB Class T18) with 12" throw .
The not matching pair might be a5'1 1/2"16 Spoke (NER McDonnel 0-6-0 LNER J22) with 10" throw.
I didn't check when I received them from Slaters, it's some time ago so it doesn't make much sense to complain. Anyway, the replacement pair arrived this afternoon. I will airbrush them with RAL 3002 and then we'll see.
The counterbalance weights are 3d-printed. I think this is a relatively simple example where 3d-printing can give a big improvement over the flat brass parts.
Michael
I didn't spot the crank throw issue, but I did spot the printed balance weights :thumbs: which has just timely reminded me that I still need to draw some really chunky ones up for the 72xx.
 

michael080

Western Thunderer
Finally, the motion is moving correctly.

IMG_20210711_222214_sml.jpg

eight M1 screws per side make the whole assembly removable. Next step is to remove everything one last time, clean up and reassemble all parts. The balance weights came out nice and prototypical.

You may have noticed that the radius bar is not gliding correctly in the expansion link. This is not prototypical but necessary, because the valve stem is fixed. If it would be fixed in the expansion link, the motion jams.

Next step are the bogies. They are very basic, the whole complicated brake and spring assembly is just an etched flat part. I visited 78 192 in Tuttlingen to understand how the bogie brakes work. The linkage is not exactly intuitive. It will be fun to draw that in CAD for 3d-printing.


Michael
 
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michael080

Western Thunderer
I noticed that is it a month since my last update, so here is where I am:

Progress is slow, it is hot here in Germany and there are other things to do.

Anyway, I am sure this is quite uncommon for your eyes, all the plumbing visible at the outside of the boilder. These machines had a long live, so there were no two of them with the exact same appearance. I have a few good pictures of 78 164, so I am quite sure that most details are accurate for the end of the 1960s.

This is a work in progress, whistle, relief valve, preheater and the little hoses at the sanding tubes are still missing. As you can see, the additional brass castings are really extraordinary!IMG_20210814_204357.jpg IMG_20210814_204412.jpg

btw., the air pump isn't supposed to hang like that :)

Michael
 

Steph Dale

Western Thunderer
Michael,

I know there's a lot of work and planning involved in the plumbing on German locos. I've started a Weinert BR 41 this afternoon, so I'm looking forward to getting to that stage in a while...

And the quality of those castings is superb, as you say.

Steph
 

michael080

Western Thunderer
here is a little update.
I didn't have a chance to do any work at the Class 78 this week, because I was playing with big trains in Switzerland.
IMG_20210901_120749_sml.jpg

However, last week was quite effective, I could finish the back tank with all its fittings. 78 164 lived long enough to be intensively photographed. All these machines were different in many details.

IMG_20210904_214055_sml.jpg

The angled stanchions were fun to make. I cut a slot with the jigsaw, extended that slot with a triangle file, bent them and reinforced the bend with a tiny bit of silversolder.
The wood parts are already cut, but I won't fix them until the last ultrasonic bath prior to priming the kit.

And this is the prototype.

78164__710405rw14k0upb.jpg

Just noticed that there is a handrail at the window and a pipe to connect the lamps to the swichboard in the cabin. A little more to do :)

@Steph, are you planning to present your Weinert class 41 here in the forum?

have a nice weekend,
Michael
 

michael080

Western Thunderer
... and here is the front side.
the turnbuckles are actually turning and would lock the smoke box door, but I preferred to solder the door in place, because there is nothing behind. Apparently, the cable between the top lamp and the connector is a bit too short, I will need to make a new one.

IMG_20210906_195947_sml.jpg

Altogether, it looks pretty much like the prototype.

78164__126-54_cr.jpg

The lower lamps in this picture are the larger "Reichsbahn" type. The lamps were frequently changed. As I couldn't get the larger type, I decided to mount the "Bundesbahn" style lamps.

This is pretty much everyhting above the footplate. I will wash everything throrougly later today.
Next step would be ladders, air reservoirs and the "Indusi" magnet. I can't start with that until I have attached the bogies and I can't attach them before I have printed the brake assembly for the bogies on my company 3D-printer. I can't print them before the printer returns from the USA (!!) where it is repaired.
So, let's see what is on the shelf of unstarted kits. I am sure I find a MMP wagon to relax.

Michael
 

michael080

Western Thunderer
@Steph,
thanks a lot for your comment. I have the feeling this thread is in a very remote orbit.
@Dave,
thanks for the links. I wasn't aware of this source of drawings. I am using the Heba-Zander GA- drawings K.P.E.V. Personenzug-Tenderlok preußische Gattung T 18 - Zeichnungssammlung ,
but the Henschel drawings seem to have a much higher resolution. The paper originals of my source were really worn, so many dimensions can't be deciphered. Unfortunately, the zander-heba.de site is broken. If you ever need a German loco drawing, you will most likely find it there.
Anyway, a bit too late. :)

Michael
 

Yorkshire Dave

Western Thunderer
I have the feeling this thread is in a very remote orbit.

Not in my world :rolleyes:. I've always had a liking for the DB as our family were stationed in Germany during the late 1960s/early 1970s and I remember travelling in the Silberling coaches although my main interest is in electric locos.


I came across the Henschel source while I was looking for photos and drawings of Normalspur Siemens-Schuckert, AEG and other small e-loks used by privatbahnen such as Berlin Postamt, Spandauer Hafenbahn and the Filderbahn for example.


I'm looking forward to seeing the completed BR 78 :) ..........with a train of Umbauwagen?
 

mickoo

Western Thunderer
@Steph,
thanks a lot for your comment. I have the feeling this thread is in a very remote orbit.
@Dave,
thanks for the links. I wasn't aware of this source of drawings. I am using the Heba-Zander GA- drawings K.P.E.V. Personenzug-Tenderlok preußische Gattung T 18 - Zeichnungssammlung ,
but the Henschel drawings seem to have a much higher resolution. The paper originals of my source were really worn, so many dimensions can't be deciphered. Unfortunately, the zander-heba.de site is broken. If you ever need a German loco drawing, you will most likely find it there.
Anyway, a bit too late. :)

Michael
Another option is Harrys files off Ebay, DVD's with selected drawings on.

CD mit Musterzeichnungen zum Nachbau der Lok der preußischen T18 und BR 78 | eBay

I don't have the Br78 as I already had it as a DVD from Heba, but I have plenty of his other loks and they're all usable and decent quality.
 

Steph Dale

Western Thunderer
Michael,

The Zander Heba site is gradually coming back to life, but there are still some infuriating gaps of drawings which I know are on there, but which I can't find currently (G12 cab, E44 drawings). Herr Zander is still being helpful however!

I like your description of a 'very remote orbit' - I agree with that, I think; my Weinert Br 41 build is being done for my own enjoyment; so it's not being documented in the same way as I would for a British loco. It is a lot of fun though. I am still eternally bemused why no manufacturer other than Piko seems to be able to get the front skirt plate on any Einheitslok to either the right angle or width...

Steph
 

Sheffield

Member
I am not sure about a remote orbit. At least this forum member is watching this build with great interest. Thank you for it.

May I take this opportunity to ask if there are any German or other EU suppliers of deatail parts in a similar manner to, say, Laure Griffin or Ragstone, for 0 gauge? I have used Schnellenkemp with success, and seen Crottendorf, but with the Uk departure and the difficulties that has brought I would like to make more use of EU suppliers if there are any. Thanks.
 

Richard Spoors

Western Thunderer
I am not sure about a remote orbit. At least this forum member is watching this build with great interest. Thank you for it.

May I take this opportunity to ask if there are any German or other EU suppliers of deatail parts in a similar manner to, say, Laure Griffin or Ragstone, for 0 gauge? I have used Schnellenkemp with success, and seen Crottendorf, but with the Uk departure and the difficulties that has brought I would like to make more use of EU suppliers if there are any. Thanks.
Oliver Suhl's website is here: DCC For You - Fahrzeug-Bauteile and Wolfgang Muellner here: Spur0tuning - Spur0 in Funktion und Perfektion
Cheers
Richard
 
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