Thread: Discussion Maxa
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Old Dec 30, 2012, 06:37 PM
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Quote:
Originally Posted by fnnwizard View Post
Hi Francesco, on the molded Supra, for zoom speed it was actually -.5 degrees in reflex and not quite flat bottomed.
Cruise was 2 degrees camber, and penetration was with .5 degrees camber so there was a 1 degree reflex difference between fast flying vs zoom.

On the Maxa, there is also about a 1mm flap setting difference between fast horizontal flying ( penetration mode) and zoom speed. Penetration is with wing flat bottomed and adding an extra mm reflex to this would yield better performance for zoom speeds.

However, I think adding a bit more might be better as Kyle experienced because of the droop nose. The added reflex beyond optimal causes the wing to fly at just slightly less than "no lift" = negative lift which keeps the fuse more inline with the airflow. Just my hunch based on other planes I have tested .
That's curious, as I am not aware of a change in the airfoil between Dr. Drela's bagged Supra and the molded one.

Do you have a Maxa, Tuan? It'd be interesting to share our settings. Personally I think that 1 mm difference is too low to get to the minimum drag point. I think I have closer to 4 degrees difference. Plus, anything of that order of magnitude is likely to be "masked" by the linkage and servo slop. May be placebo, but nothing real.
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