Here's the Fox .50: http://www.foxmanufacturing.com/inde...oducts_id=1519

I am interested in the concept. I would think that something more appropriate for a .60 size airplane would be better though since those airframes generally have more room and maybe deal with a little added weight better. Who know'd though, maybe these little .50'ish engines will work out well in .40 size airplanes.

I'm really curious about the OS 55cc gasser. I'd like to get my hands on one soon. If they took that concept and scaled it down to something appropriate for smaller airplanes too, it might be nice.

I've seen mixed reviews on the Saito gassers. A few people on here seem to love them but the people who I've met in person that own them say that they are very disappointed and frustrated. Not sure what the truth is. I guess I'd have to try one myself to really find out.<br type="_moz" />