Wednesday, March 15, 2006

Answer: Design of Airplane

Max range for a jet is generally at best ((Cl^1/2) / Cd). The best indicated airspeed at 20,000 lbs is 130 KIAS and at 6000 lbs is 80 KIAS. These are speeds for best range which are not the same as for best endurance which is what the question asks about but is not relevant. Average tailwinds this flight are about 70 knots.