Download GTU BE/B.Tech 2017 Winter 7th Sem New 2170101 Aircraft Design I Question Paper

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Seat No.: Enrolment No.

GUJARAT TECHNOLOGICAL UNIVERSITY

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BE - SEMESTER-VII (NEW) EXAMINATION — WINTER 2017
Subject Code: 2170101 Date: 02/11/2017
Subject Name: Aircraft Design I
Time: 10:30 AM TO 01:00 PM Total Marks: 70

Instructions:

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1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

MARKS

Q.1 (a) Write down the significance of vortex generator. 03

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(b) How the wing configuration of passenger aircraft is different from 04 fighter aircraft.
(c) With the help of block diagram briefly explain about three stages of aircraft design. 07

Q.2 (a) Why the high lift devices are operated at take-off and landing conditions? 03
(b) With neat sketch explain function of trim tab. 04
(c) Which aerodynamic considerations will you make to design a supersonic jet fighter’s fuselage? 07

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OR

(c) Explain cyclic pitch and collective pitch control in brief with neat sketches. 07

Q.3 (a) Explain the significance of sweep back angle. 03
(b) Only draw any type of plan form shaped wing and mention Mean Aerodynamic Chord, Geometric Aerodynamic Centre, Root Chord, Tip Chord, C.G Range and Neutral Point. 04
(c) With neat sketch explain advantages and disadvantages of different tail plane configuration. 07

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OR

Q.3 (a) Listout the different types of aircraft. 03
(b) Explain the significance of Dihedral, Polyhedral and Anhedral wing configurations 04
(c) Write down procedure to design wing geometry of a public transport jet aircraft. 07

Q.4 (a) Explain how tail rotor supports maneuvering of a conventional helicopter? 03

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(b) Explain about the control surface sizing of a tail plane. 04
(c) Explain the advantages and disadvantages of retractable landing gear over fix landing gear. 07

OR

Q.4 (a) Why there is a variation in thickness of airplane wing from root to tip? 03
(b) Explain how to determine track and base distance of landing gears. 04

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(c) Write down the design differences between fighter aircraft and passenger aircraft. 07

Q.5 (a) How to determine load acting upon wheels of aircrafts when aircraft is fully loaded with payload and fuel? 03
(b) Discuss about the different types of engine mounting locations for different aircraft. Also explain its significance. 07

OR

Q.5 (a) Explain the significance of tapper ratio. 03

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(b) Suppose you want to convert single engine piston prop aircraft into jet plane configuration how will you convert Hp/Wo from Tmax/ Wo Ratio? 04
(c) Discuss different rotor configurations with neat sketches. 07

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