GTU B.Tech 2020 Winter Question Papers || Gujarat Technological University
Subject Name:Aircraft Design I
Time:10:30 AM TO 12:30 PM Total Marks: 56
3. Figures to the right indicate full marks.
4. Make sketches by drawing instruments only
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER-VII (NEW) EXAMINATION - WINTER 2020
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Subject Code:2170101 Date:19/01/2021Subject Name:Aircraft Design I
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.
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2. Make suitable assumptions wherever necessary.3. Figures to the right indicate full marks.
4. Make sketches by drawing instruments only
| MARKS | |
| Q.1 (a) Define Maximum take-off weight, fuel weight, and basic empty weight. | 03 |
| (b) Explain flight envelope of any one type of aircraft. | 04 |
| (c) Explain three phases of aircraft design. | 07 |
| Q.2 (a) Explain importance of structure factor in aircraft design. | 03 |
| (b) Discuss relationship between fuel quantity and range. | 04 |
| (c) Explain how maximum take off weight is determined. | 07 |
| Q.3 (a) Explain how to set fraction of size of horizontal and vertical stabilizer. | 03 |
| (b) Draw and explain geometry of tricycle type landing gear. | 04 |
| (c) Discuss under carriage retraction geometry of a low wing, dihedral jet transport aircraft having sweep back angle of 23°. | 07 |
| Q.4 (a) Only draw side view of an under carriage geometry of tail wheel aircraft. | 03 |
| (b) Explain how to set size of rudder. | 04 |
| (c) Discuss the effects of taper ratio and aspect ratio on flight performance. | 07 |
| Q.5 (a) Explain airfoil selection for tail plane. | 03 |
| (b) Explain effects of T/W ratio on flight performance. | 04 |
| (c) Discuss the effects of taper ratio and aspect ratio of vertical fin on spin recovery. | 07 |
| Q.6 (a) Explain procedure to select engine and T/W ratio. | 03 |
| (b) How will you design vertical fin? Discuss with respect to tail plane volume. | 04 |
| (c) Which considerations will you take to select tail plane configuration? | 07 |
| Q.7 (a) Only draw possible tail plane configuration of single engine jet fighter empennage. | 03 |
| (b) Classify types of engines used in supersonic aircrafts. | 04 |
| (c) Explain conventional and co-axial rotor configuration. | 07 |
| Q.8 (a) Shortly explain function of main and tail rotor in conventional helicopter. | 03 |
| (b) What different types of airfoils are used for construction of main rotor and tail rotor blades of helicopters? | 04 |
| (c) With neat sketch explain cyclic and collective pitch controls of conventional helicopter. | 07 |
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