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00000ME461121902

Pages: 2

Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY

Seventh semester B.Tech examinations (S), September 2020

Course Code: ME461
Course Name: Aerospace Engineering

PARTA
Answer any three full questions, each carries 10 marks.

Classify different regions of standard atmosphere based on the temperature
variation.

Explain why the temperature varies in different regions of atmosphere.
Calculate the temperature, pressure and density of standard atmosphere at 6km,
11km and 18km altitudes.

Explain lifting line theory.

Explain the different types of drag encountered by aeroplanes.

An aircraft having wing span 12m and wing area 18.52 produces a lift of
80,000N when flying at 350km/h. Calculate the induced drag when flying at sea
level, Assume span efficiency factor as 0.8.

Write some methods to reduce the wing tip vortices.

PART B

Answer any three full questions, each carries 10 marks.
Derive the general equations of motion of an aircraft.
Deduce the equations of motion for a level unaccelerated flight from the general
equations.
Calculate the power required for an air craft of mass 232ton flies at 420km/h.
The density altitude of the flight is 7km and the coefficient of parasite drag is
0.002. The Oswald efficiency factor for the flight is 0.85, span 65.4m, wing
area 620m’.
With help of a schematic explain the variation of forces acting on an aircraft
during take-off.

Derive the expression to find out the length of ground roll required for landing.

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Duration: 3 Hours

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