Compound steam launch engine

[Marinesteam]

Hi all,

Thought I'd share some pics of my current project. A 1:1 scale steam engine capable of pushing a 22-30 foot launch (boat). It's a York 3x5.25x3.75 compound from castings by the Elliot Bay Steam Launch Co. I've had the set for awhile but have just started the build in earnest.

Studs & eccentric rod clevis'

Babbitt pour

Babbitted bed plate

Partially completed, animated CAD model
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Thanks for looking
Ken

 

[steamer]

Nice Looking engine Ken.
Mine is not quite so big 1.5 x 3.0 x 2.5

I do like the long legs on the York!
How are the prints?.....I know the triple has issues...

Dave

 

[Maryak]

Ken,

Nice job of pouring your journals :bow: :bow:

What grade of whitemetal did you use ???

Best Regards
Bob

 

[Marinesteam]

Bob,

I used Magnolia Anti-friction and will be using DZL for the rod ends.

Dave,

The prints are pretty good, There are still a few minor inconsistencies. There have been several of these built so most of the bugs are worked out.

It is a pretty leggy engine. But is going to look really nice installed.

Thanks

Ken

 

[steamer]

Long rods are a godsend....they reduce the variations on rotational velocity and minimize accelerations.

Short answer....smoother engine...

Dave

 

[Maryak]

Bob,

I used Magnolia Anti-friction and will be using DZL for the rod ends

Thanks for that but I must admit I am no wiser : how do they relate to SAE grades ???

Best Regards
Bob

 

[Marinesteam]

Bob,

That's a really good question. But I'm afraid I don't know the answer as Magnolia is cryptic in their descriptions.

Through discusions with Magnolia it seems that the AF is a higher quality general purpose Babbit and DZL is a high pressure (nickle) version.

Even their Babbitt webpage is hidden from plain site. I found it accidentally in a Google search. I don't think you can get to the page from their corp home page. They were pretty accommodating to a relatively small purchase, I think the minimum was $100 or $150 which was easily met with the qty of ingots I needed.

http://www.magnoliabronze.com/antifric.htm

http://www.metalwebnews.com/howto/babbitt/babbitt.html

Ken