Garrat-Steam-Locomotive (I have a Question about...)

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Garrat-Steam-Locomotive (I have a Question about...)

Mehltheuersteam
Full member
Joined: January 24th, 2017, 12:05 am

August 3rd, 2017, 6:46 pm #1

This is a Garrat I saw at Technikmuseum Berlin:



Question

How was the steamline connected from the boiler to the ariculated/flexible bogies?
Via some "hose" or a steam-tight "pivot" or something?
There must have been some amount of pressure, I presume +- 8 bar.
The exhoust is fed via a flexible hose to pipes, but I didnt saw how
the steam-engines got steam...
Does anyone know how it was done?
Are there some drawings?
I didnt saw how, when I was at the museum or found something on google...
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Roly Williams
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Joined: August 2nd, 2006, 5:11 pm

August 3rd, 2017, 8:58 pm #2

I think they used ball and socket joints.
Have Fun
Roly

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Jon Cameron
Steam Supreme Being
Joined: August 25th, 2015, 2:35 pm

August 3rd, 2017, 9:07 pm #3

I'd I remember rightly, the steam line passes through the bearing for the boiler Firebox, chassis. Into the drive bogies. As Roly says I think it's a ball and socket joint. The weight of the boiler and cab providing constant pressure on the joint maintaining a del while the locos drive bodies are free to rock and roll with the track.
Jon

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Killian Keane
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Killian Keane
Steam fanatic
Joined: September 3rd, 2016, 3:10 pm

August 3rd, 2017, 9:24 pm #4

Indeed, however on the first articulated locos (little wonder etc) , the steam line itself was coiled round like a spring which gave it sufficient flex
Blokes with tea can build anything. :brew:
https://www.youtube.com/channel/UCnKuGT ... _RJqhZ2QBw
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Mehltheuersteam
Full member
Joined: January 24th, 2017, 12:05 am

August 4th, 2017, 4:43 pm #5

Thank you for your answers.
The application through a ball+socket joint make sense.
So the weight of the boiler and chassis applies the force, to
hold the pressure to tightening the steam line.
Thats a great solution :-)
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