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TECNOLOGIA AEROESPACIAL I TRANSPORT AERI (Curs Total)
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What of the following statements are assumptions for Keplerian orbits?
Regarding a GEO orbit:
- It has a 24-hour period
- It has not sense in a non-equatorial plane
- It is only used for communications satellite constellations
The main characteristics of a launch vehicle are:
- total mass = 15000 kg
- payload mass = 1000 kg
- empty mass = 2000 kg
effective speed of exhaust gasses = 3048 m/s
The rocket equation
What is the specific impulse of a rocket?
- The thrust of a rocket
- The thrust of a rocket, per ejected mass
- When the rocket has an adapted nozzle, the specific impulse is the effective speed of the exhaust gasses divided by the gravity constant.
Launch vehicles are multi-staged because
What the typical values of specific impulse in chemical propulsion systems?
A typical value of velocity in a low-earth orbit is
What of the following physical properties are conserved in Keplerian Orbits?
Heavy-lift launch vehicle are able to put 10-20 tonnes into LEO, and 5-10 tonnes into GTO.