Introduction to Aerospace Transportation Systems Exam Questions and Answers

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Code No: R05222105
Set No. 1
II B.Tech II Semester Supplimentary Examinations, Aug/Sep 2008
INTRODUCTION TO AEROSPACE TRANSPORTATION SYSTEMS
(Aeronautical Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks

1. What were the principle features of the “Wright Flyer”. Explain with sketches the
lift generated for its sustainable ight. [16]

2. Calculate pressure, density and temperature at an altitude of 13000m in stratosphere.
Develop the relationship used. The sea level data is;
P = 101325 2, T = 150 , L = 0.0065 K /m. [16]

3. (a) Describe with adequate sketches/diagrams/illustrations, ma jor components of
an airplane. What is the use of each component?
(b) Explain the construction of its wing in details, considering it to be a two seat
light weight, trainer airplane. List the materials of its fabrication. [8+8]

4. (a) Prove that the velocities for minimum power and minimum drag in straight
and level ight of airplane can be obtained from the Power vs Velocity plot.
(b) An airplane weighs 5000 N and has a wing loading of 600 -2 . If its drag
polar is D =0.010 +0.022 L2, determine its velo city for minimum power in
straight and level ight. [8+8]

5. (a) You are to plan for adding a small civil trainer airplane for a small ying club
in a remote village. Spell out the role and justi cation for the airplane under
considerations.
(b) What are the steps to be taken for planning the schedule of next ight afresh
from station P to station Q, over ying stations A,B and C? Prepare the plans
for approval of the authorities. Name such authorities. [8+8]

6. (a) Explain the safety of airplane from the airworthiness of the total components
taken as an integrated unit.
(b) A uid possesses faster cooling properties at lower altitudes and becomes less
e cient at higher altitudes. Provide your reasoning and remedies to the prob-
lem. [8+8]

7. Describe an integrated heating system for a pressurized airplane in details. What is
the source of heat and pressure in this case. Make use of line diagrams and sketches
to bring home your point. What are the categories of aerospace vehicles covered
under this system? [8+4+4]

8. (a) What are the requirements of ADF in avionics? Describe with an example.
(b) Show with a sketch the layout of the operating system of elevators of an
airplane in a Fly-By-Wire control system and explain its functioning. [8+8]

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Code No: R05222105
Set No. 1

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Code No: R05222105
Set No. 2

1. (a) Describe with some details, the surface transportation systems developed by
humans over the ages along with the improvements / superiorities.
(b) Compare your ride over a camel back with your ride on a two wheeler pedaled
vehicle. Comment on the comfort in both the cases. [8+8]

P = 101325 2, T = 150 , L = 0.0065 K /m. [16]

3. (a) Classify Military airplanes according to the role for which these are designed.
What are their distinct features in comparison with a civil airplane? Illustrate
with at least one example each say from the inventory of armed forces. Make
use of representative sketches.
(b) Describe features typical of a single seater airplane for sports / racing use.
What should be the speed range of such airplane? [8+8]

4. Consider the drag polar = D0 + L2. Show that the power required to overcome
the drag in st. and level ight is a minimum if {CD CL1..5} is a minimum. Hence
prove that Lmp = CLmd(3)1/2. Show the complete work out. [16]

5. (a) Describe the requirements of air superiority ghter interceptor for the armed
forces.
(b) What measures are taken for the checking of cargo at a domestic airport?
[8+8]

6. (a) Relate the terms:
i. air safety
ii. Airworthiness
iii. Certi cate of Airworthiness
iv. Prevention of air accidents.
(b) Describe the speci cations and acceptance testing of an assembly with rubber
and metallic seals and lubricating oil, to be carried in ight from Pokhran to
Leh. [8+8]

7. What are the requirements of cabin-cooling systems in an aerospace vehicle? De-
scribe one method of such air conditioning employed in a space vehicle. Make use
of sketches and diagrams to illustrate the answer. [4+12]

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Code No: R05222105
Set No. 2
8. (a) Explain the “SATCOM” system of communications in avionics.
(b) Illustrate the functioning of an all moving horizontal tail of an airplane in a
Fly-By-Wire control system with a detailed layout sketch. [8+8]

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Code No: R05222105
Set No. 3

1. Describe the steps and developments leading to the rst powered ight of heavier
than air vehicle. Explain with sketches. [16]

P = 101325 2, T = 150 , L = 0.0065 K /m. [16]

3. (a) Categorize airplanes on the basis of ‘missions for which designed’. Provide an
example each with illustrations.
(b) Consider wing of an all wood airplane. Show the details and resistance to
moments experienced by the wing in ight. [8+8]

4. (a) De ne the terms:
i. stalling speed
ii. wing loading
iii. minimum drag condition
iv. minimum power condition. Establish their importance in airplane perfor-
mance calculations / predictions.
2. If the airplane ies straight and
(b) Consider the drag polar D = D0 + L
level at a velocity V, Plot the relationship between Power, P and speed, V.
Can you locate the velo city for minimum drag on this curve? [8+8]

5. (a) Describe the requirements of air superiority ghter interceptor for the armed
forces.
(b) What measures are taken for the checking of cargo at a domestic airport?
[8+8]

6. (a) De ne the terms:
i. air safety,
ii. Airworthiness,
iii. Certi cate of Airworthiness,
iv. Prevention of air accidents.

(b) Explain the speci cations and acceptance testing of an assembly with rubber
and metallic seals and lubricating oil, to be carried in ight from Pokhran to
Leh. [8+8]

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Code No: R05222105
Set No. 3
7. Explain the requirements of cabin-cooling systems in an aerospace vehicle. Describe
the air-cycle cooling system of such air conditioning employed in a space vehicle.
Make use of sketches and diagrams to illustrate the answer. [4+12]

8. (a) Explain the role of radio waves in avionics. Discuss the propagation of radio
waves as well.
(b) Explain the control surfaces and the operations of an airplane with appropriate
illustrations. [8+8]

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Code No: R05222105
Set No. 4

1. (a) Describe a two wheeled vehicle, with an external source of power to drive it
with illustrations.
(b) Explain the e ect of the size of the wheels on the motion and stability of a
scooter as seen on the roads in India? [8+8]

2. De ne aerodynamic forces acting on a ying ob ject. How is the lift force generated
in such cases? Show with representative sketches and plots these forces acting on
the following:

(a) at plate aligned with ow
(b) at plate at = 2o.

(c) a stationary circular cylinder.
(d) a rotating circular cylinder.
(e) a symmetrical airfoil at =0o.
(f ) a cambered airfoil at = 0o. [4+6×2=16]

3. Show with appropriate sketches details of the construction of an all metal tubular
frame fabric covered fuselage for a light airplane . Explain the sharing of loads by
all members. [16]

4. A sailplane has GTOW of 5500 N and wing loading w = 600 -2. Its drag polar
is given as D = 0.010 +0.022 L 2. Determine its md and mp. Check if the two
velocities are as per the relation (to be established by you). [8+8]

5. (a) Describe the purpose of acquiring a trainer aircraft for civil /domestic re-
quirements. What are the essential features of such airplanes? Elaborate with
examples.
(b) Prepare the ight plans of your personal airplane for ight between station X
and station Y. In between there are three airports P,Q and R. List the steps
of action at your end before you submit the ight plans. [8+8]

6. (a) Describe the role of (i) FAA and (ii) CAA in the USA. What is the role of
DGCA and CEMILAC for that matter in INDIA.?
(b) List the steps for ensuring airworthiness of certain component on an airplane.
[8+8]

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Code No: R05222105
Set No. 4
7. Describe the necessity and details of the heating system to be used in a large multi-
engine airplane. Describe one such system making use of an air bleed system.
[8+8]

8. (a) What are distinct advantages of Selective Calling System(SELCAL)?
(b) Sketch the layout of the operating system of elevators of an airplane in a
Fly-By-Wire control system and explain its functioning. [8+8]

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Introduction to Aerospace Transportation Systems Exam Questions and Answers

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