03-06-2013, 03:53 PM
II Semester Examinations,APRIL 2011 INTRODUCTION TO SPACE TECHNOLOGY
INTRODUCTION TO SPACE.pdf (Size: 49.64 KB / Downloads: 17)
1. Write short notes on the following:
(a) Orbital velocity and escape velocity.
(b) Geo-synchronous orbit. [8+7]
2. Write short notes on the following:
(a) Auroral activity.
(b) Inner and outer radiation belts about the Earth.
© Solar wind and solar corona.
(d) Magnetopause and Magnetotail. [15]
3. Write short notes on the following with regard orbital elements:
(a) Argument of perigee.
(b) True anomaly.
© Right ascension of the ascending node. [5 + 5 + 5]
4. Explain how jet damping is useful in controlling spinning vehicles. [15]
5. Consider an initial circular, low-earth orbit at a 300km altitude. Find the velocity
change that is required to produce an elliptical orbit with a 300km altitude at
periapsis and a 3000km altitude at appoapsis. Given , the gravitational parameter
for Earth = 398600.4 km3/s2 and radius of Earth = 6378.14km. [15]
6. Discuss how the weather conditions are going to aect the launching of a space
vehicle and the role of
ight control team in adverse situations. [15]
7. Describe the two methods to determine the hypersonic drag coecient for a re-entry
space vehicle. [15]
8. (a) How does a liquid motor dier from a solid rocket motor? Explain which of
the two will be useful for a sounding rocket of diameter 10cms and length
1.5m.
(b) A missile carries a war head of 50 kgf. This single stage rocket has lift-o load
of 300 kgf, structural load is 250 kgf, and propellant load of 2700kgf. If the
specic impulse is 300 sec., calculate the burnout velocity.