TRIPLE Marine Steam Engine - German Museum München

A special section just for steam engines and boilers, as without these you may as well fit a sail.
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dampfspieler
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TRIPLE Marine Steam Engine - German Museum München

Post by dampfspieler » Sun Jul 05, 2020 9:10 am

Hello,

this Video of a sectional cutted open marine steam engine of SCHICHAU in german museum is impressive.

[Youtube]https://youtu.be/kPtRvCuvJ6w[/Youtube]

Best Dietrich
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Re: TRIPLE Marine Steam Engine - German Museum München

Post by RNoe » Sun Jul 05, 2020 3:02 pm

That triple expansion engine has some very sophisticated design aspects in the valving.
Things I have not heard of before.
Thanks for sharing.
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Re: TRIPLE Marine Steam Engine - German Museum München

Post by PeteThePen1 » Sun Jul 05, 2020 7:27 pm

Thanks Dietrich

That is an excellent video and good to see that there are explanatory 'sub-titles' (Not sure what the correct name is for on screen labelling!).

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Re: TRIPLE Marine Steam Engine - German Museum München

Post by dampfspieler » Sun Jul 05, 2020 8:43 pm

Hi Russ,
... some very sophisticated design aspects in the valving
that is named Meyer expansion control.

It was often used German marine steam engines.

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Re: TRIPLE Marine Steam Engine - German Museum München

Post by RNoe » Mon Jul 06, 2020 2:18 am

Dietrich:
Thanks for the Meyers link. Unfortunately my German is insufficient to understand the text.
I may have to send that to my 84-year-old Step-Mom in Seattle for translation.
She was born and raised in Hamburg.
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Re: TRIPLE Marine Steam Engine - German Museum München

Post by Lopez Mike » Tue Jul 07, 2020 1:35 am

I believe there was an attempt to use this sort of thing on some locomotives long ago (late nineteenth century) on the Central Pacific railroad in the western U.S. It was called Stevens valve gear (not stevenson). It was the brain child of the chief engineer of the railroad, A.J. Stevens, and was a constant hassle for the operating department as few workers in the field could keep it adjusted properly. It was promptly replaced with Stevenson gear as soon as Mr. Stevens retired!

https://books.google.com/books?id=qJIOA ... R&f=false

Fuel costs were not thought important in those days. Wood was pretty much free.

I have no idea whether A.J. Stevens was any relation to the very well known steam engineer of the same last name working much earlier in the century on marine designs. Quite different valve gears though.
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Re: TRIPLE Marine Steam Engine - German Museum München

Post by steamboatjack » Tue Jul 07, 2020 7:14 am

Meyer expansion gear was very common in UK on the smaller types of horizontal engines used on land, not so common for marine use where a constant load was expected.
I would have thought it an over complication on a navy ship. Trick valves were used basically to reduce the length of valve stroke while still allowing a large and fast opening port. It’s a pity the electric motor is driving the engine “astern” when the links are almost in the “ahead” position.
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