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Sorry, should explain further. Wing sections and profiles are selected depending on a large number of reasons, operating lift coefficient, stall angles, drag bucket shape, spanwise lift distribution, tip vorticity, etc, etc. Our section was chosen, very carefully, from the latest data available, and we are exceptionally happy with it. Iron Duck is a different machine and obviously has a different set of requirements for the wing, hence the different shape. Would not be able to make any assumptions as to the more accurate choice! Hope this helps, Richard.
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