Download PTU (I.K. Gujral Punjab Technical University Jalandhar (IKGPTU) ) BE/BTech Aero (Aerospace-Engg) 2020 March 6th Sem ANE 324 Helicopter Engineering Previous Question Paper
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Roll No. Total No. of Pages : 02
Total No. of Questions : 09
B.Tech.(ANE) (Sem.?6)
HELICOPTER ENGINEERING
Subject Code : ANE-324
M.Code : 60533
Time : 3 Hrs. Max. Marks : 60
INSTRUCTION TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks
each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students
have to attempt any TWO questions.
SECTION-A
1. Answer briefly :
a) List the advantages of ?tandem rotor helicopters? over ?side-by-side rotor helicopter?.
b) Define Tip Speed. How it affects the helicopter performance during forward flight?
c) Explain the functions of main gear box.
d) Define Bearing-Less Rotor. How pitch variation is achieved in bearing-less rotor?
e) Explain the phenomenon of blade stall during forward flight of helicopter.
f) Define disk-loading. List the advantages and disadvantages of having low-disk-
loading.
g) Explain the phenomenon of coriolis effect.
h) Define Figure of merit and its importance.
i) What is ?Ring guard? tail rotor system and how it is better from conventional tail
rotor?
j) List advantages of ?rotary-wing? aircraft over ?fixed-wing? aircraft.
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1 | M - 6 0 5 3 3 ( S 2 ) - 1 9 5 6
Roll No. Total No. of Pages : 02
Total No. of Questions : 09
B.Tech.(ANE) (Sem.?6)
HELICOPTER ENGINEERING
Subject Code : ANE-324
M.Code : 60533
Time : 3 Hrs. Max. Marks : 60
INSTRUCTION TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks
each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students
have to attempt any TWO questions.
SECTION-A
1. Answer briefly :
a) List the advantages of ?tandem rotor helicopters? over ?side-by-side rotor helicopter?.
b) Define Tip Speed. How it affects the helicopter performance during forward flight?
c) Explain the functions of main gear box.
d) Define Bearing-Less Rotor. How pitch variation is achieved in bearing-less rotor?
e) Explain the phenomenon of blade stall during forward flight of helicopter.
f) Define disk-loading. List the advantages and disadvantages of having low-disk-
loading.
g) Explain the phenomenon of coriolis effect.
h) Define Figure of merit and its importance.
i) What is ?Ring guard? tail rotor system and how it is better from conventional tail
rotor?
j) List advantages of ?rotary-wing? aircraft over ?fixed-wing? aircraft.
2 | M - 6 0 5 3 3 ( S 2 ) - 1 9 5 6
SECTION-B
2. Explain physically the effect of 'sideslip disturbance on the helicopter.
3. A helicopter weighing 25000 N has a rotor diameter of 14 m. The rotor rotates at 100 rpm
and is hovering at sea level conditions. Find the disk loading, induced velocity and rotor
thrust coefficient.
4. Write a short note on ?Mangler and Squire method?.
5. A tilt rotor helicopter weighs 800000 N. The rotor diameter is 12 m. On the basis of
momentum theory, estimate the power required for the rotorcraft to hover at sea level on
standard day. Assume that the figure of merit is 0.75 and transmission losses amount to
7%.
6. Explain the various types of auto-rotative landings.
SECTION-C
7. Distinguish between active and passive vibration control systems. Explain the various
passive vibration control systems with the help of sketches. (4,6)
8. What are the basic controls of a helicopter? Describe how pilot uses these controls to
achieve various desired flight conditions? (3,7)
9. Explain the working states of rotor with the help of neat sketches. (10)
NOTE : Disclosure of identity by writing mobile number or making passing request on any
page of Answer sheet will lead to UMC case against the Student.
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This post was last modified on 21 March 2020