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  1. #1

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    cox 049 vs ap 061

    its been awhile since i ran either of these engines. i know the ap 061 is waek compared to the norvel. im thinking of building a 1/2a p51 mustang from plans i found on the internet. it calls for cox td 049 to 051. so does the ap 061. have the pulling power of a cox 049
    james ward

  2. #2

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    P-51D_Mustang_36in.pdf here is the plane im wanting to build
    james ward

  3. #3
    aspeed's Avatar
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    Jul 2011
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    I think they are about the same. I haven't checked my AP yet, and it is too cold still. Fire them up on the same prop and check with a tach. Maybe a 6 - 3"

  4. #4
    Mr Cox's Avatar
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    Power is comparable I guess but the cox are more sensitive and tricky to use if you are not used to them, preferable use a pressured fuel system and finer pitch needle, plus high nitro. The AP will spin a 6x3 prop at around 17500rpm, even on 0% nitro, plus you get a throttle and muffler...


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