ORIGINAL: bigedmustafa
Just to add additional confusion, World Models makes several ".50-sized" pattern planes that would be a good fit for the YS Engines .63 as well. You can check them out at
http://www.airborne-models.com
Zen 50, Groovy 50, Spot On .50, and Aero Pet .50 ARFs all come immediately to mind.
You could also check out the Sportsman Aviation Excelleron .50 pattern ARF available at
http://www.hobbypeople.net
Thanks. I added more to the list above. There are more out there than I thought.[8D]