Amazing application!Tempo wrote:@mstrens
In picture above and below you see RC-model of my own (wingspan 3,3m F3J-glider) "Wirbelzähler" fitted in picture above.
Yes, I use a micro with analog circuit (frequency-filters and amplifier with dynamic compressor) designed for my "Wirbelzähler".
Velocity is calculated by an optimized fourier-transform implemented on Atmega328.
Correct catching of vortex is important. Look here for functional principle : http://en.wikipedia.org/wiki/K%C3%A1rm% ... tex_street
(Inside my F3j-glider is microcontroller for datalogging and control loop. For example actual control loop brings fuselage to zero-angle of attack automatically. Measurement of flow angle by differential pressure with "5-hole-probe". I used apparatus in pictures for calibrating flow angle of "5-hole-probe" http://www.grc.nasa.gov/WWW/k-12/airplane/tunp5h.html. I have integrated "5-hole-probe" in fuselage nose of F3J-glider. Flow velocity is measured permanent with differential pressure calibrated by "Wirbelzähler".)
I understand the principle. But do you really need a 5 hole probe instead of a 3 hole probe?
I imagine that you automatically control the rudder but not the elevator.
Is your "autopilot" allowed in competition?