Never seen one like this before...

[mjt60a]

I just thought it might be of interest, probably not reversable though...
http://cgi.ebay.co.uk/Small-model-live-steam-vertical-twin-overhead-valve-eng_W0QQitemZ270255772927QQcmdZViewItem?hash=item270255772927

[Eddy Matthews]

I'm certainly no expert on steam engines (exactly the opposite in fact!), but I cannot see meccano chain and sprockets being very good for accurate valve timing!

Regards
Eddy

[bogstandard]

I had an email conversation with a chappie about this engine and he asked me how it worked. From a picture it is very difficult to work out, but I think I had it cracked on how it worked. It definitely wasn't worth what it went for, as if it did work on the principle I came up with, it would only just about have enough power to turn itself over.

John

[steamboatmodel]

My guess is the top shaft is hollow and has holes drilled, which will match ports in the top. Definitely was over priced. Looks like it may have been a shop project at school, and probably only turned over on shop air unregulated. I vaguely remmember seeing something similar in a shop project book when I was in grade school(That's a real long time back).
Regards,
Gerald

[mjt60a]

another unusual (over-complicated?) design, seems to have quite a good low speed ability though - http://www.youtube.com/watch?v=0q9CgUW-O7g

[derekwarner_decoy]

Hi PD's ...& yes Mick it is only a model...........but  ...I would not like to be the first bearing in the output shaft with that amount of shaft wobble   .....Derek

[poodge]

But isn't it just adorable,with all those bits moving