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Thread: .40 Engine in Phoenix Sonic?
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Old 09-09-2019, 07:51 AM
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speedracerntrixie
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9x7 would be about the perfect load for an FP40 and be in its power band. I used to run 9x7 on OS 40 FSR and Webra Speed .40. That being said the 9x7 may not be the best prop for that airplane.
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