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Ed Cesnalis

No flaps, and low power settings in the mountains

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5 hours ago, ct9000 said:

So is your need to keep the speed so high for other reasons like inertia to fight unexpected shear?

2 primary reasons, shear, excess energy for emergency canyon exit.

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On 5/29/2018 at 8:20 PM, Ed Cesnalis said:

It was the other Andy that revealed that Vx was determined by comparing drag and available power profiles for each flap setting.

The other Andy is an aerodynamicist.  I am a hack.  So if anything he said contradicts anything I've said, disregard my BS.  😀

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You, sir, are NOT a hack!!  I'm constantly impressed with what you do.  I'm not an aerodynamicist, per se, just got my degree in aerospace engineering a long time ago and love air and spaceflight.  I'm still a student and am spending a lot of time studying aerodynamics in an effort to build some teaching materials that get it right (there's a lot of trash out there right now including the aero courses put out by AOPA and CAP).  What we were talking about was aircraft performance which has an obvious heavy aero flavor.  Would love to have some data on the CT airfoil and some CL vs AOA flap data but I've not been able to find it (though I did find one study I think is probably close) but, to be honest, I haven't taken the time to see if I could pry it out of the CT engineers.

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Thanks.  Already knew that and think it might correspond to the Eppler E180 airfoil at this website but am unsure if they are the same. http://m-selig.ae.illinois.edu/ads/coord_database.html 

Also, found this paper referencing it: https://www.researchgate.net/publication/295875067_Investigations_on_stability_and_control_characteristics_of_a_CS-VLA_certified_aircraft_using_wind_tunnel_test_data

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