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engine choice for a 15-4W prop

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engine choice for a 15-4W prop

Old 08-14-2006, 11:22 AM
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Default engine choice for a 15-4W prop

I've been running my Harrier 90 3-D plane with a .91 4 stroke engine and a APC 15-4W prop and have had decent performance. I've got a bunch of these props so if I were to put one of them on a Fox .74 or a .ST 90 2 stroke, would it perform differently?

No commitment, just looking for an opinion from you guys who have tried it.
Old 08-15-2006, 11:54 AM
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Default RE: engine choice for a 15-4W prop

It will be fine on the ST90 although its not my favorite prop for that engine.

I would definetly switch out the 4 stroke on that harrier for the ST90. Even the ST90 will probably give you marginal 3D performance but with a 91 4 stroke there is no doubt it is underpowered for a 3Der.
Old 08-15-2006, 08:32 PM
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Default RE: engine choice for a 15-4W prop

I tried a 15x4w on a fox 74 in a hog bipe. Fox spun it about 9000 rpm on 0 nitro, I think. Too much prop however. Plane was slow and went back to a 13x6. a 14x4 gives good performance though.

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