I actually worked on a UAV project a few years ago in which we took a YS 1.60DZ, converted it to gas by changing all the o-rings and such and then running it on ignition (C&H). The engine would run, but was certainly not very powerful. It took a lot of playing to get the timing correct. The biggest problem we had was cooling. We had to run quite a bit of oil to keep the engine even semi cool, and it would still regularly overheat. Eventually we abandoned the idea and ran Evolution 35's instead. Was neat to play with though.

As for the Pentathalon that George Miller had with the OS 1.60 converted to gas. The performance was OK. The Pentathalon is not a very draggy airframe to start with, and it was adequate for Advanced. I don't think it would've been a competitive setup in Masters or FAI, but was a very nice proof of concept. Had a very distinctive sound in the air as well. He did have a few deadsticks however, but the idea did work, but was certainly not a competitive setup by todays standards.

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