Best prop for fx160
04-30-2002, 07:36 PM
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Best prop for fx160
I'm looking for a prop that will give me high thrust for 3d.I'm using a Moki 18-8.it's in a DPExtra330L@ 13.5LBS. Can I go with a 20x6 or 20x8,or is this to much prop for the fx 160?
Thanks
xtraflyr :rainfro:
05-01-2002, 10:41 AM
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Best prop for fx160
Xtra, what is the best prop as far as how the engine RUNS in your configuration, on your fuel, etc? The reason i ask this is that the ideal prop for your configuration may not match the ideal prop for mine...esp considering altitude, etc. Personally, I spin a 18x8 or 18x10 on this engine happily, with lots of aerobatics time on it, and our R&D team spent a lot of time with this engine in the new Patty Wagstaff extra and were very happy with the engine's performance (although the plane is a bit heavy for this engine).
A good rough starting point to select a prop is to start with a prop you really like how the engine runs, easily tuned, nice idle, etc. mult pitch times diameter. ie 18x10 = 180. now you'd like a 20" prop. so divide 180/20 = 9. roughly a 20x9 will give you a similar load and will perform similarly for the engine. similarly, a 22x8.
Of course, higher diameter, lower pitch, means more thrust and better 3D but slower overall airspeed.
A good rough starting point to select a prop is to start with a prop you really like how the engine runs, easily tuned, nice idle, etc. mult pitch times diameter. ie 18x10 = 180. now you'd like a 20" prop. so divide 180/20 = 9. roughly a 20x9 will give you a similar load and will perform similarly for the engine. similarly, a 22x8.
Of course, higher diameter, lower pitch, means more thrust and better 3D but slower overall airspeed.
