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Old Jan 27, 2013, 08:01 PM
Jim Thomerson is offline
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Joined Jan 2008
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Designed an airplane for the K&B 4011. I did not leave enough space between the end of the muffler and the wing. I measured the area of the muffler outlet. I drilled enough 3/32 holes in the muffler to give me about 10% more area than the original outlet. I cut off the original outlet and plugged the hole. It worked fine.
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