Important
Now we have a resin remake for TTm and a version for H0m available.

General Information

A tank car for the 1/120 scale 1000m narrow gauge fire fighter train. The train was located in Wernigerrode Westerntor, Germany (1980s). Our source is an article for H0_mscale from 1988^[1] with some changes to make this print possible for TTm scale.

Please read the hints, they may be inportant but not in the best order.

History and original

The original tank car was built in 1900 to transport sulphur acid. ^[1]

The GHE (Gernrode-Harzgeroder Eisenbahngesellschaft, Selketalbahn) has 2 tank wagons. One was used between Gernrode and Fluor (siding named fluorine) until 1945 and was used as water tank for the firefighter train between 1955 and 75 (our wagon). The other was used for petroleum delivery in Harzgerode ^[2]

Fluor was near Straßberg. Sulphur acid is necessary for hydrofluoric acid fabrication. 1946 this siding as well a lot of tracks were removed.^[3]

Finally we have a nice picture from 1983 as well as a drawing with more and other hand rails.^[4] Remarkable and different from my build there are vertical plates:

on the left:
DR
99-01-98

and on the right:
Feuerlöschzug
BW Wernigerrode Wt

I decide to ignore these vertical plates and made a more traditional tank mount, because we needed camouflage the wider frame of the scale model.

Printing

1x wheel bearings
1x wheel bearings (mirrored)
1x floor

1x tank (take the newest one, the older is just for decoration purposes
1x tank man hole
2x tank end
1x tank stand
1x drain

1x Handrails with brake
1x plank
1x ladder

The rendered image above fit not 100% the final design, but I think, you can imaging how will look like and where the parts will be located. I'll add photos after finishing the paint job.

For Tank and end pieces I printed 0,15mm first layer (you have to activate first layer thickness in CURA settings) other layer with 0.05 as well 0.03mm - this really works!

If you suffer from stringing, adjust your printer and print one single parts after the other, this helped a lot.

Before printing turn tank in CURA, to have the seam on the lower side (long gaps for tank stand). I added a V02 tank without gaps and cuttings just in case you want to have a tank somewhere, it seems to print nicer than the one with gaps, but measuring is often harder.

You have to glue frame to bearings:

• check the axle hole printing results, sometimes you have to redrill them
• try fit first, sand until it work, first layer are sometimes difficult
• try fit the wheel set, I update the frame with lower support beams, but not sure if they will fit your wheel sets
• glue the bearings with attached wheels set, the material is stiffer than normal plastic

You have to sand the 4 stripes off on the brake (front) side between coupling box and floor to fit the handrails.

Add drain pipe in the hole below the tank. You have to cut the supports from the ends, i would cut near the bulge - these are the connectors to the fire hose. Try to make the drain as cylindrical as possible. You also could use wire.

I added a ladder to the plank -- cut it according to your needs.

The upper tank contains 8 small holes for a hand rail, I'd drill them to 0.7 -0.9 mm and added a wire loops from thin wire after sanding the tank and -- I recommend -- before closing the tank with the end pieces ... theoretical you should be able to tighten and glue the loops from the inside. I soldered the loops and pressed them in with a warm soldering iron.

Add a step from waste material between plank and man hole.

Add some weight, maybe inside the tank before closing. I added pieces lead below the floor and some pieces inside the stand to increase the weight.

I used printed couplings from wsvenny on cults3d and old PIKO wheel sets (sanded and polished) use good wheel sets

Updates

2022-10-17 changed hints to more weight and better wheel sets
2022-10-16 redesigned some parts because the couplings were to low
2022-10-15 first print to check the published stl files
2022-10-14 several updates for hand rails, brakes ...
2022-10-13 First hand model of frame an bearing with some old PIKO wheel sets, changed frame
2022-10-13 First tank 2 print but I'll keep the V02 ... maybe someone need a tank with all bolts to put it into the landscape
2022-10-10 First sub of the final tank car

Sources

[1] Ort I.(1988): Ein Feuerlöschzug in der Nenngröße H0_m. In: Modelleisenbahner 2/88. Transpress Berlin. p.34f.

[2] Kieper, K., Preuß, R. & Rehbein, E. (1980). Schmalspurbahn-Archiv. Berlin: Transpress, Verlag für Verkehrswesen. p.218.

[3] https://bimmelbahn-forum.de/forum/index.php?thread/892-flu%C3%9Fspatgrube-glasebach-bei-stra%C3%9Fberg/&postID=59294#post59294

[4] Zieglgänsberger, G., Röper, H. & Roeper, H. (1989). Die Selketalbahn (Transpress-Verkehrsgeschichte, 3., bearb. u. erg. Aufl.). Berlin: Transpress Verl. für Verkehrswesen. p. 121.

Additional sources

I will post some videos on TikTok and pictures on Instgram

Origin and licensing

• Technical drawing was published in the journal marked as source ^{[1 (p.34f)]}.
• You are free to print and rescale my work for your projects and close friends.
• I don't want any commercial use of this design and prints.
• If you are representing a model or railway club, a school or something comparable with these and want to use it for educational purposes in higher numbers, please tell me.