Mission to MarsWe have a goal : to go to Mars in 2025, we are going to talk about the vehicule.

I. The Spacecraft

Our spacecraft will be a rocket composed of 3 essential elements

The Orbiter

• The orbiter is the most important element, it’s the only component that goes into orbit. It carries the freight and the crew.

The External Tank

• The second element is the external tank : it protects the orbiter until it reaches Space.

• Its role is essential because if the orbiter is damaged, the crew can die.

The Rocket Boosters

• The rocket boosters are as essential as the orbiter and the external tank.

• They are used to reach Space because the whole spacecraft is heavy then it needs a powerful boost to leave the Earth.

Dimensions

• length : 37,24 m• Span : 23,79m• Empty weight : 68 586,6 Kg• Total weight when launched : 109 000 Kg• Total weight when arrived : 104 000 Kg• Presurized cabine : 71 m3• Average speed : 7 800 m/s• Welcome up to 7 passengers (minimum 2)• + Thermal shield composed of insulating tiles

II. Energy Comsumption

• I will talk about energy comsumption of the rocket going to Mars.

• A- The take-off

• - The rocket has a motor of ergol liquid type.

• - The rockets don’t use energy in Space, they only use energy to take off.

• - They use 100.000 liters of liquid oxygen and 60.000 liters of kerosene per minute for the take-off.

• - It takes five minutes to get out of the atmosphere.

• B- The return• We intend to go to Mars, but what about the

way back ?

• To go back to the Earth there are a few hypotheses :

• - The MAAC : It is a system compressing carbon dioxide, we can use for the take-off.

• - The OGS : It is a system producing oxygen, we can use with the carbon dioxide.

• - The MATE : It is a system of solar panels producing electricity.

• - The DART : The dust is studied to avoid accumulation on solar panels.

• - The MTERC : A radiator is being tested to cool the reactor.

• C- The production of electricity in the rocket

- To produce electricity in the rocket, microbial cells are used.

- These cells are based on the principle of combustible cells : the cathode is supplied with oxygen and the anode is set in a chamber containing the bacteria.

- The system transforms all micro-organisms into electricity.