Aircraft Design Practice Test 9

1. An aircraft is consider to be over damped. What will be the appropriate value for damping ratio?

2. Determine the value of rudder deflection δr for an aircraft which is flying in north with the velocity of 60.5 m/s under the crosswind of 5m/s from east to west with Cnβ=0.02/deg and Cnδr = -0.045/deg, where sideslip angle β is -4.72°.

3. How can we say that the aircraft has initial tendency to return to its original equilibrium position after being disturbed?

4. Yawing moment is positive if __________

5. If moment coefficient about aerodynamic centre of wing is -0.216 and lift coefficient of wing is 1.2. Find moment coefficient about cg. Given cg location as Xcg = 0.3.

6. Determine the value of drag at which we can have minimum power if given reference area is 10m² and zero lift drag coefficient is 0.5. Consider q as 120Pa.

7. If damping ratio is unity then, system is _____________

8. Elevator control power is given by _____

9. Which of the aircraft will be statically stable based on following diagram?

10. Stick force is function of ___________