"1/2 A" & "1/8 A" airplanes These are the small ones...more popular now than ever.

cox 049 vs ap 061

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Old 03-19-2014, 04:05 AM
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jdwardus
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Default 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
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Old 03-19-2014, 04:09 AM
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[ATTACH]1979474[/IMG] here is the plane im wanting to build
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P-51D_Mustang_36in.pdf (1.06 MB, 39 views)
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Old 03-19-2014, 06:32 AM
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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"
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Old 03-19-2014, 06:42 AM
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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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