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Old 09-04-2019, 06:30 PM
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rcjetflyer0718-RCU
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Originally Posted by AllModesR/C
Anyone who has been following my other thread knows I have an O.S FP Max .40 engine from another plane that is underpowered for that airframe. Would it be advisable to put this engine in this aircraft even though the maximum recommended size is .32?

https://www.towerhobbies.com/cgi-bin...?&I=LXEWXD&P=0
I have an Evolution 40NX in my sonic and it flies quite fast. Make sure the fuel you use for the 40 FP has plenty of castor oil and try a 9X7 prop.