Radial Steam Engine

[flopearedmule]

Hi Everyone
I have been searching the plans and drawings, looking for another winter project.  I came across these prints posted by Julius.
http://www.modelenginemaker.com/index.php/topic,5475.0.html

Here's a video of another one on youtube.
<a href="https://www.youtube.com/watch?v=VpKG-Ip2_6k" target="_blank">http://www.youtube.com/watch?v=VpKG-Ip2_6k</a>

I have never seen a radial steam engine with slide valves before.  Is there a real one out there somewhere?
I remember a long time ago seeing the Hula Hula by Philip Duclos.  But this one was oscillating. Still pretty cool and I copied my Dads article in Home Shop Machinist to build someday.
I think maybe the slide valve radial is more interesting.  If anyone knows more about this, or knows any other plans out there, please let me know.
Thanks