You Can Blame Stilldrilin for this

Gallery, Projects and General > Gallery

<< < (3/4) > >>

sbwhart:

--- Quote from: vtsteam on November 08, 2013, 05:46:50 PM ---Nice work Stew!

I have one that I've experimented with, and changed the displacer from expanded polystyrene foam, to a piece of Scotchbrite pad. I was curious to see if an open mesh displacer would work as well as a solid insulator if it gained from regeneration that way what it lost to permeability. It ran well with either displacer. Can't remember which was better.

Yours looks very nice.

--- End quote ---

Now that is a good idea using the scotch bright pad, I'd really like to get it working off hand heat so that is well worth trying.

Stew

Stilldrillin:
Scotchbrite!! :bugeye:

Thanks Steve! I wonder how much heat it can stand, compared to balsa wood....... :scratch:

David D

vtsteam:
I would try to keep the displacer itself under 50C. Of course it runs somewhere around an average of the hot and cold sides. But if it stops at the bottom end it could reach close to the end plate temp.

Melting temp might be higher, but if the material sags at its upper temperature range, it will contact the displacer cylinder at the bottom and rob energy that way.

Here's the engine I mentioned with the replacement displacer:

vtsteam:
And a start I made on a much larger more complex (internally) version.

It's a little outside of the (hat) box, in terms of LTD configuration in most ways. Not sure why I stopped work on it -- I was almost done. Maybe I should take it up again.

Stilldrillin:
WOW, Steve!!! :bugeye:

Is that a diaphragm. As opposed to a power piston? :scratch:

"Maybe I should take it up again". Well.... I, for one. Think you should! Soon!! :D

David D

Navigation

 Message Index

Go to full version