9 2)

10000ME461122003

PART C
Answer any four full questions, each carries 10 marks.

Distinguish between mass balance and aerodynamic balance?

b) Explain the action of control tabs in providing balancing of controls

10

11

12

13

14 a)

A high speed subsonic DC-10 airline is flying at a pressure altitude of 10km. A
pitot tube on the wing tip measured a pressure of 4.24x10*N/m?. Calculate the
Mach number at which the airplane is flying. If the ambient temperature is
230K, calculate the true airspeed and calibrated airspeed
Describe with the aid of a schematic diagram the working principle of a closed
circuit supersonic wind tunnel. Why a high molecular weight gas sometimes
preferred over a high Mach number test
With the help of neat sketches explain the working principle of

i)Vertical speed indicator

ii)Turn and Back indicator

iii) Altimeter
An astronaut is about to explore an asteroid of average density 5000kg/m?. He is
worried that he may accidently jump from its surface and float off into space.
How big must it be before he can neglect this possibility? The astronaut knows
that his mass ‘m’ including space suit is 91kg. He knows that on earth he can
raise his centre of gravity 0.6m by jumping his space suit on. It seems reasonable
to assume that the maximum energy output of his legs will be the same on
asteroid as on earth. G=6.67x10"''N/m’kg.
Describe the working principle of a supersonic Airplane Engine with neat

sketch?

b) Write short notes on space travel.

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