The Unofficial Mamod and Other Steam Forum

John

Can anyone provide a photograph, sketch or description of the reversing mechanism on the original Meccano steam engine?

Thanks

John

tmuir · Posted: Thu Jan 31, 2008 3:24 am Post subject:

Hi John,

If you look on Wallace's website and scoll to the bottom you can see a photo of the mechanisim detatched from a Meccano engine.
Not sure it will provide you with enough detail but it's a start.

http://www.freewebs.com/mamodsteam/enginerestoration.htm

Welcome its always good to get another local Perth member.
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A nice example of an Australian made Scorpion Donkey Engine

Nick · Posted: Thu Jan 31, 2008 6:03 am Post subject:

I can take pics of mine if that didn't help. What is it you want to see?

John · Posted: Fri Feb 01, 2008 7:27 am Post subject:

Thanks Tony, Wallace's website images give me a few clues to work with.

Thanks for your offer Nick.
I have built a small 'wobbler' type steam engine that I can 'build in' to Meccano models-as shown below. ( Sorry about the focus) I thought it would be nice to be able to reverse the engine by changing over the steam flow as in the original Meccano engine rather than having to build a gearbox.

Rather than re-invent the wheel I thought I would find out how Meccano did it.

Thanks

John

Wallace · Posted: Fri Feb 01, 2008 8:18 am Post subject:

Hi John

Nice engine

I could get some more pics of the reverse mechanism if you would like. I haven't taken much notice of it on the 1929 Mec engine, but assume it would be much the same as a Mamod.
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tmuir · Posted: Fri Feb 01, 2008 11:40 am Post subject:

Ahh John what you want is pictures of an se2a reversing mechanism or a Roadster or any other Mamods that use a similar method.
Has anyone got a good photo of that to put up?
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A nice example of an Australian made Scorpion Donkey Engine

John · Posted: Sat Feb 02, 2008 5:16 am Post subject:

Thanks guys.

A drawing or photograph of the operation of the reversing valve from any or all of these engines would be would be great.

I am looking for some thing that is easy to make and compact. From Wallace's images it looks like a rotary valve is used to direct the steam to the proper port to make the engine run forwards or backwards.

John

Wallace · Posted: Sat Feb 02, 2008 10:31 am Post subject:

Will grab pics or sort something tomorrow for you hopefully

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