I momentarily saw an email posted asking about the prop for an O-200, then the email evaporated off my system. But if I remember correctly, the post said Sensinich was recommending a 60D x 70P prop, and the poster suggested that may be a bit too much pitch. Keep in mind, that the same diameter and pitch by a different manufacturer isn't always going to be the same, but FWIW, using a Prince P-tip prop, mine is 62D x 66P. That was just about perfect for my KR when I was based at 7200' MSL. Now that I live at a much lower altitude (720'), it's not enough prop for my O-200*. Straight and level full throttle operation at 3000' MSL turns 2800 rpm at 158 kts(and burns lots of gas!) The diameter of the prop helps with acceleration from a stop, so will help reduce take off roll. If you can accomodate more prop length, I would recommend it. However, I do have longer gear legs and full size 5:00x5 tires, so I have more ground clearance than most KRs. If I was going to buy another prop, I would probably buy a 66d x 68p prop. * Note: My O-200 does have 8.5:1 pistons, so is likely making about 5 hp more than a stock O-200. I also found that building tuned length headers gave the engine a significant increase in performance, as did a number of aerodynamic improvements I've done to reduce drag over the last 20+ years. For a KR with a stock O-200, standard 2 into 1 exhaust logs, shorter gear legs, and not a lot of extra effort put into drag reduction, I would guess a 60D x either 66 or 68 Pitch would probably be more appropriate, depending on what rpms you want to turn. A 60 x 70 would work OK, but probably wouldn't be my first choice for that configuration. Your mileage may vary. :o) -Jeff Scott Cherokee Village, AR
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