I just finished restoring and improving (I hope) a Cub .074 diesel. I removed the burrs in the bypasses and crank port and replaced the needle with a Cox RTF needle (worked great on a couple of other cubs). It currently has a 7x4 Tornado prop on it. That seems about right, but I could use some input, as I have never run a diesel this size.
I plan to build a Wee Duper Zilch for next year's VSC and it has little tank room. I figure the .074 on a VERY LIGHT model will fly well, and use way less fuel than the original .099 glow.
PS. Any hints or kinks on the Zilch? I plan to redo the plans in CAD and get Eric Rule to laser cut it. If you guys think this is a PLAN and want copies, when I am done, contact me or Eric.