FLIGHT DYNAMICS IMPORTANT Questions Bank

Anna University, Chennai

SRINIVASAN ENGINEERING COLLEGE, PERAMBALUR DEPT OF AERO

FLIGHT DYNAMICS IMPORTANT

UNIT-I

1. Types of drags and its reduction methods.(Refer Xerox notes)

2. ISA layers, Troposphere, stratosphere derivation.(Refer your own)

3. Obtain the values of pressure, density and temperature at 5 km in ISA.(Refer your own)

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UNIT-II

For unit-II may three types of questions will ask in your university exams. TYPE-I

1. Derive the two equations given below and represent it graphically

D = AV2 + B/V2 ; P = AV3 + B/V.(Refer class notes)

2. An airplane is flying straight and level at a speed V which is ‘n’ timer the minimum power speed Vmp. Show

P

that

= 3 + n

P 4n

4

(Refer mail attachments)

min

3. For an aircraft in straight and level flight at a speed of ‘M’ derive the minimum drag speed. Show that

Dmin 

D =

2

 m +

1  where D is drag of the aircraft.(Refer mail attachments)



2  m 2 

4. An aircraft weighing 25 kN has a wing area of 80 m2 and its drag coefficient is CD = 0.016 + 0.04 CL2, calculate the minimum thrust required for straight and level flight, and the corresponding true air speed. At sea level and at 10 km (ρ= 0.58kg/m3). Calculate also the minimum power required and the Corresponding true air speeds at the above conditions.(Refer class notes)

5. One more problem is taken in class room.(Refer class notes)

6. Drag polar for different speeds.(Refer Xerox notes)

TYPE-II

1. V-n diagram.(Refer Aircraft performance book, pages 341-343)

2. Maneuvering, climbing, Gliding, and Turning flight performance.(Refer class notes)

TYPE-III

1. Range and Endurance equations.(Refer class notes)

2. Power available and power required curves.(Refer class notes)

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UNIT-III

1. Wing contribution and wing with tail contribution derivations.(Refer class notes)

2. Problems taken w.r.t above derivations.(Refer class notes)

3. Stick-fixed and Stick-free stability derivatives.(Refer mail attachments)

4. Power effects for piston engine and jet engine airplanes.(Refer mail attachments)

For Unit-IV study all these theory questions.

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UNIT-IV

One engine in-operative condition, Rudder lock and dorsal fin, coupling between rolling and yawing, Adverse yaw, Aileron reversal, Whether cocking effect, Rudder requirements.(Refer Xerox notes)

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UNIT-V

1. Stability derivatives , Routh’s discriminant derivations. (Refer Xerox notes)

2. Phugoid motion, Spiral instability, Auto rotation, Spin and its recovery and Dutch roll. (Refer Xerox notes)