Here's a 2012 project, Jim O'Reilly's Tubestake. It's a 52" span radio controlled (rudder only) rubber powered Mulvihill.
The only restriction with Mulvihill is that the wing is 300 sq. inches or less, so I think it's good choice for RC conversion.
Unfortunately, I think the rudder fin was too small to turn it adequately, and I lost it over some buildings on a test flight!
You can see the video at my youtube site: www.youtube.com/domoremath