Download PTU B.Tech 2020 March Aero 7th and 8th Sem ANE 413 Airplane Design Question Paper

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Roll No. EEEEEEEEEE Total No. of Pages : 02

Total No. of Questions : 09

B.Tech. (ANE) (Sem.=-38)

AIRPLANE DESIGN

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Subject Code : ANE-413

M.Code : 70495

Time : 3 Hrs. Max. Marks : 60

INSTRUCTIONS TO CANDIDATES :

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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. Distinguish between the following terms (use sketches wherever required) : (10x2)
   1. Anhedral & dihedral angle.

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   2. Camber & camber line.
   3. Wash-in & wash-out.
   4. Critical & drag divergence Mach number.
   5. Low & high wing loading.
   6. Equivalent airspeed & true airspeed.

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   7. Geometric & aerodynamic twist.
   8. Range & endurance.
   9. Slat & slot.
   10. Trim & stability.

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SECTION-B

2. Explain the ‘gust envelope’ of a typical fighter aircraft with help of a neat & labeled diagram. (5)
3. Explain the features of various types of inlets used in high subsonic & supersonic aircrafts with the help of neat and labeled sketches. (5)

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4. Explain the various factors affecting the selection of airfoil section and wing planform. (5)
5. Calculate the stroke of oleo-type shock absorber with the help of data given below for an aircraft making a touchdown on a runway at sea level at forward and vertical speeds of 35m/s and 5 m/s respectively.
   Rolling radius = 40cm Wheel width = 20 cm Wheel diameter = 90 cm
   

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   n=0.8 Tire efficiency = nr = 0.45 Gear Load factor = Ngeor = 3
   Also calculate the weight on wheel for a given pressure of 15 bar.
6. What are boundary layer diverters? Give two examples with brief description. (5)

SECTION-C

7. A 250 seated jet aircraft with the following given data is flying at 10km altitude.
   

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   M cruise = 0.7 Mach M loiter = 0.5 Mach Cruise = 6000 km Loiter = 80minutes
   (L/D)max = 16 C cruise = 0.54/hour C loiter = 0.44/hour p =0.4135 kg/m’
   P =26000 N/m* We/Wo=0.97 Wo Payload =80000N W passenger = 65 kg/passenger
   1. Draw Mission segment.
   2. Estimate weight of the aircraft.

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8. For the aircraft in Q.7.,
   1. Find out the length and diameter of the fuselage. Use length = 0.287*W, ^0.43 where W, is in kg. Suggest and sketch the seating arrangement for this aircraft. (5)
   2. What will be the %age change in weight if the aircraft is to be designed for additional payload of 20000 N? (5)
9. Write notes on the following :
   1. Airworthiness and its responsibility. (5)
   2. Role of composite material in modern aircrafts. (5)

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NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.

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