Arduino base angle-of-attack unit (AOA) http://www.rivetbangers.com/forums/viewtopic.php?t=4704 Science behind differential AOA sensors http://www.nar-associates.com/technical-flying/angle_of_attack/DeltaPAOA_wide_screen.pdf http://nar-associates.com/technical-flying/angle_of_attack/DFRDAS_AccurateLowCostAoA.pdf