BR81 valve train and connecting rod linkage differances

BR81 valve train and connecting rod linkage differances

Postby Rich1853 » Tue Feb 19, 2019 9:12 am

Looking at the BR81 dampfloks I notice that the 81-004 made by Tillig has a different valve train, connecting rod linkage. Is it because it's that way today being the only one of ten built that is perserved or something else. Was this change made after retirement or during active service.

BR_81_004_Tillig_02219.jpg

BR_81_001_Tillig_02211.jpg
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Re: BR81 valve train and connecting rod linkage differances

Postby krokodil » Tue Feb 19, 2019 9:59 am

No, it is just a simplified version of the same model.
Such gear on the original locomotive would mean some special construction, I do not think that the BR81 had such special versions.
Last edited by krokodil on Tue Feb 19, 2019 4:05 pm, edited 1 time in total.
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Re: BR81 valve train and connecting rod linkage differances

Postby CFRiad » Tue Feb 19, 2019 11:12 am

Could it be that the 81-004 unit is an earlier BTTB model?

BTTB used to omit modelling the valve gear on the entry level models. In a 40-year old BTTB catalog I have, they are proudly announcing that the more elaborate models have a working Heusinger valve gear.

Btw, "Heusinger" was what the Germans called the valve gear that everybody else in the world called Walschaerts. It was the most wide-spread type of valve gear in the late steam era.
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Re: BR81 valve train and connecting rod linkage differances

Postby krokodil » Tue Feb 19, 2019 3:30 pm

I have the Zeuke model and also one BTTB, both with full valve gear. I have not seen this simplified version in real life yet.
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Re: BR81 valve train and connecting rod linkage differances

Postby krokodil » Tue Feb 19, 2019 3:52 pm

I checked all catalogs from early 60-ies till today. The class BR81 had about 20 production batches but all had a complete gear. Maybe the model on your picture was modified by somebody ( removed the remaining parts of the gear. You can see also the cut of part close to the valve.
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Re: BR81 valve train and connecting rod linkage differances

Postby krokodil » Tue Feb 19, 2019 4:09 pm

IMG_3846.JPG
BR81 original Zeuke

Here is the original version. It was a bit bigger ( due to the larger motor) but came with a complete gear. Only one axle was driven. All later versions had all axles driven by the long worm axle.
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Re: BR81 valve train and connecting rod linkage differances

Postby Rich1853 » Tue Feb 19, 2019 4:22 pm

Those two photos on my post were from the modellbau-wiki site.
http://www.modellbau-wiki.de/wiki/BR_81
And from Tillig 2000 catalog
http://as.rumia.edu.pl/tt/kat/katalogi. ... 4&kat=2000
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Re: BR81 valve train and connecting rod linkage differances

Postby krokodil » Tue Feb 19, 2019 4:47 pm

Maybe it was in some start set. Those locomotives were usually not sold separately therefore were also not in catalogs.
In earlier times in start set was the BR92 with two axles only and a single rod on each side.

You are right, I found it in Tillig catalog for start sets.

http://as.rumia.edu.pl/tt/kat/katalogi. ... 4&kat=s_09
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Re: BR81 valve train and connecting rod linkage differances

Postby Arseny » Wed Feb 20, 2019 2:40 am

They were sold separately several years ago, at least here in Russia.

I have the start version of the BR92 too. It was my first start set in TT. It is still alive and I like it. :)
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