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

Jim walker firecracker


Old 04-28-2014, 01:16 PM
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Default Jim walker firecracker

I have a Jim Walker firecraker engine how can I tell if it is a .049 or .065? I ran it with a 6x3 apc and it turned 10,000 rpm. my norvel .061 turns 17,000 with the same fuel.
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Old 04-28-2014, 07:29 PM
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The "Firecracker" is .065 in displacement, a 6X3 prop sound adequate for it(would do better with a MAS than a APC), off course its not as powerful as a .061 Norvel!
The "Firebee" didn't requires that much power in the 50's.
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Last edited by coriolan; 04-28-2014 at 08:43 PM. Reason: Add picture
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