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Model 12 inverted flying issue

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borvaprops

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Nov 22, 2010
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Hello from Brazil guys, I have a model 12 and for some reason can't get the engine to run sustained for more than 2 seconds while flying inverted. Replaced flop tube, check for clogged breathers so far all look good but problem still persists.
Anyone experienced this in the past?

Regards
 

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