Originally posted by Dave McDonald
Eventually, our King Kombats evolved into a plane I called the DaWing, which used foam wings, OS 40FP engines, and had a modified elevon design that completely cured the flutter problem, even without the wingtips.
Hey Dave, do you know what sort of speed you're getting with these things? The aforementioned club buddy (who had one of these King Kombats years ago) reckons I should be able to get something like 200kph out of this thing

I'll be stoked if that's the case! I'm beefing up the elevons by using 5mm balsa instead of the 1/8th inch the plans call for, in anticipation of the extra speed. I've also added an extra hinge for each elevon, just in case. I like your idea of the foam cores. I'm going to ask the aforementioned club buddy to cut me a core for the next one
I'll post some pix when I get it all together.