Ref FAA PHAK 5-45 What’s Mcrit – Mach Crit? Ans: airflow over any part of the aircraft or structure under consideration first reaches (but does not exceed) Mach 1.0.   Design of increase Mcrit (delay occurrence of shock wave) ? Thin airfoil (reduce the thickness) drawbacks: reduce the wing tank volumn Sweepback drawbacks: need to … Continue reading Mach Crit (Mcrit)?