JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech II FLIGHT MECHANICS-I Previous Question Paper (May - 2019 - R13)
Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit.
Part A
Define off-standard atmosphere.
Answer
An off-standard atmosphere refers to any atmospheric condition where the pressure, temperature, or density values deviate from the defined International Standard Atmosphere (ISA) values at a given altitude. These deviations occur due to seasonal changes, geographical location, or meteorological phenomena, and are critical in flight mechanics for calculating actual aircraft performance and engine thrust.
Write the expressions for lift, drag and side force.
Answer
The aerodynamic forces acting on an aircraft in the stability axis system are defined by the following expressions:
In these expressions, ρ represents the air density, V is the true airspeed, S is the reference wing area, and CL, CD, and CY are the non-dimensional coefficients for lift, drag, and side force, respectively.
What is the effect of weight on cruise performance?
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Give the expressions for endurance of a jet engine and propeller engine.
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What is instantaneous turn?
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What is the effect of wind on climb performance?
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What is tankering?
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Explain about fuel planning.
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What is the use of aircraft datum performance (WAT) chart?
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Draw the payload-range diagram.
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Part B
What is total airplane drag? How do you estimate it? What are the ways to reduce drag?
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Explain the role and design mission of an aircraft.
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Write a short note on air data computers.
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Derive an expression for range of a propeller engine.
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Explain about the cruise performance with mixed power plants.
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Derive the equations of motion of aircraft of an accelerated flight.
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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 about the various phases involved in Flight planning.
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Write the procedure for the estimation of take-off distances.
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Brief about the parametric performance data analysis.
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Write the procedure for operational analysis.
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