(Solved):   1 An aircraft is designed to operate in cruise at a value of C of 0.25 at an altitude w ...

 

1 An aircraft is designed to operate in cruise at a value of C? of 0.25 at an altitude where the ambient density is 0.4 kg.m³. It has a wing area of 80 m² and its drag polar is: CD = 0.02 +0.04C² If the maximum thrust from all engines at that altitude is 24 kN, find: (i) the maximum cruise speed of the aircraft (TAS); [258.2 m/s] (ii) the maximum cruise speed as a value of EAS; [147.5 m/s] (iii) the weight and mass of the aircraft; [266.7 kN: 27183 kg] (iv) the maximum and minimum speeds the aircraft can maintain in S&L flight at that altitude, using the drag equation. [258.2 m/s, 91.29 m/s]