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Old 01-10-2005, 09:35 AM
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bob27s
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Default RE: 3-blade props fopr Dubb Jett 1.20 ???

The Phantom has ground clearance for a 12" prop - sometimes for a 13" if you fly off a hard surface. I've heard of some people using 14" blades, but I don't know how they managed that.

I'd suggest using an APC 12x12 on the 1.20 to start with. As long as it is the cast case 1.20. It wont mind the RPM
That will give you the best all-around performance, and some good top end speed. If you have room, perhaps go up to a 13" dia prop after that. See which one you like.

For this application try to prop the engine in the 10K to 12K rpm range. A little bit over that is ok too (just pushing the outside of the tuned muffler range).