Register Number
(Established under section 3 of UGC Act,1956)
Course & Branch : B.E - AERO
Title of the Paper : Rocket and Missiles Max. Marks:80
Sub. Code : 526702-626702 (2005-2007-2008) Time : 3 Hours
Date :07/03/2012 Session :AN
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PART - A (10 x 2 = 20)
Answer ALL the Questions
1. What is the function of booster charger?
2. Write an expression for ignition delay.
3. What is the significance of boat tail?
4. What is wing control and canard control?
5. Name the phases of trajectory in missiles.
6. What are the important features of rocket motion under constant thrust?
7. How swiveling nozzle is used for TVC?
8. What is ullage rocket technique?
9. List the selection criteria for materials used in spacecraft structure.
10. What are the ablative materials?
PART – B (5 x 12 = 60)
Answer ALL the Questions
11. Describe with suitable sketches how propellant tanks of bipropellant Rocket can be arranged?

(or)
12. A liquid oxygen hydrogen rocket thrust chamber develops a thrust of 10,000kgf for a mixture ratio of 3.4 the Isp of motor is
420sec and it operates for 120sec the density of oxygen and hydrogen are respectively 1200kg/m 3 and 79kg/m 3 . Find out the propellant tank volumes.
13. Write short note on:
(a) Lateral aerodynamic damping moment
(b) Longitudinal aerodynamic moment.
(or)
14. Illustrate about dispersion in missiles and rockets. What are the measures to minimize it?
15. Determine the burnout velocity and burnout altitude for a drag less rocket with the following parameters for a simplified vertical trajectory; Effective exhaust velocity (C) = 2000m/s; Propellant ratio m p
/m o
= 0.6 burning time t b
= 10sec and u o
=h o
=0. Assume that rocket developers constant thrust.
(or)
16. Derive the expressions for burnout and culmination ranges.
17. What is parallel staging of rockets? Discuss the advantages and disadvantages of parallel staging compared to tandem staging?
(or)
18. Illustrate about technique used for stage separation in rockets?
Write advantages and disadvantages of separation techniques?
19. With the help of a neat sketch, explain how thermal protection can be ensured for re-entry bodies. Give the examples of ablative materials?
(or)
20. Discuss the choice of materials for solid motor nozzle and describe their functions.