"The code I use (Arduino) is: #define SEALEVEL_SOUND_KNOTS 661.4788 #define SEALEVEL_PRESSURE_PSI 14.6959465 float knots = SEALEVEL_SOUND_KNOTS * sqrt(5 * ((pow((psi0/SEALEVEL_PRESSURE_PSI)+1,(2.0/7.0))-1))); psi0 comes from a differential…"

"I built a pitot-static tube with a dual-port "differential" pressure sensor MPX5010DP, which works. It has a 0-1.45 PSI range, next time I will use a different sensor with a lower range, probably 0-.5 PSI, to give better accuracy at lower…"

"Airspeed (IAS indicated airspeed, not TAS true airspeed) is calculated using the differential between static (ambient) pressure and pitot (dynamic) pressure. You can simply vent the static port inside the fuselage, but it is more accurate to use…"

"Hi, As what you said, Basically: groundspeed = GPS. Airspeed = pitot. Wind = pitot - GPS May I know what is the purpose of static port? Also, what is the max and min value for the pitot tube? Thanks for the help!"