- INSAT 2C ( Indian National Satellite -2C):
- Polar Sun synchronous satellite: orbits with inclination of 90 degrees from the earth’s equatorial plane, and altitude between 700-12 km are known as polar orbits. If the satellite orbital plane is able to gradually change its inclination at the rate of 0.9856 degree per day which is equal to the apparent motion of the sun around the earth, the orientation of the satellite with respect to sun will remain unchanged. Such orbits are called sun synchronous orbits. These orbits are ideal for earth observation. Indian remote sensing satellites are operating in polar sun synchronous orbits at an inclination of 99.04 degrees to the equatorial plane.
- Helicopter: After starting the propeller of the helicopter, the body of the helicopter starts rotating in the opposite direction due to the reaction of the propeller. Now, after starting the tail rotor, the helicopter becomes stable. Unlike aeroplanes, helicopters get the lift and thrust from the propeller.
- A model to describe rocket propulsion:
Weight: 2106 kg with propellants, 946 kg dry weight
Onboard power: 1320 Watts
Communication: C, extended, C, S and Ku bandsStabilization: 3 axis stabilized with two momentum wheels and one reaction wheel, magnetic torque.Propulsion: Integrated bi-propellant with 16 22N thrusters and 440N LAM.
Payload: Transponders 16 C-band, extended C-band transponders (for FSS), 2 high power C-band transponders (for BSS), 1 S-band transponder (for BSS) 1 C/Sband mobile communication transponder, 3 Ku band transponders.
Launch date: December 7, 1995
Launch site: Kourou, French Guyana
Launch vehicle: Ariane 4
Orbit: Geo-stationery, 93.5 degrees est.
Inclination: 0 degrees
Mission life: 7 years
Orbital life: Very long.