JNTU
JNTU B.Tech II FLIGHT MECHANICS I Previous Question Paper (September/October - 2023 - R13)
Note: i) Question paper consists of Part A, Part B. ii) Part A is compulsory, which carries 25 marks. In Part A, answer all questions. iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
(25 Marks)
What are the different drag reduction methods?
Answer
Drag reduction methods include streamlining of the fuselage and components, use of laminar flow airfoils, winglets to reduce induced drag, surface polishing to reduce skin friction, and the use of retractable landing gear.
What is the effect of specific fuel consumption on altitude and flight speed?
Answer
Specific fuel consumption (SFC) is inversely proportional to range and endurance. As altitude increases, SFC typically changes due to variations in air density and temperature, affecting engine efficiency. At higher flight speeds, the required thrust increases, which can lead to higher fuel flow rates, thereby increasing the effective SFC for a given mission profile.
What are the various cruise techniques?
Answer
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Write the expressions for maximum and minimum speed in level flights.
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Give the expression for maximum climb rate.
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What are the boundaries for a Manoeuvre?
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What is ground effect?
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Classify the types of civil aircraft.
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What is the purpose of performance measurement in flight?
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Explain about runway correction.
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Part B
(50 Marks)
Derive an equation for the minimum drag conditions.
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Write the aerodynamic relationships for a parabolic drag polar and draw the drag polar for different airfoils.
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Derive an expression of range for a Jet engine.
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What is the effect of fuel flow and weight on cruise performance? Explain in detail.
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Obtain the relation for the time to turn through a given angle for a level turning flight.
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Explain in detail, the effect of wind on climb and descent performance.
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Write the procedure for the estimation of take-off distances.
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What are the air safety procedures and requirements on landing performance?
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Write the procedure for operational analysis.
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Explain in detail about the equivalent weight method.
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