Planet atmosphere

During this time that I has learning for the theory fly exams I was think that I provide me too much thinks to write here. At the same time, the day only have 24 hours (strictly less than this, 23h 56min 4sec). But I have a huge list that I will write, from time to time.

Also last Thursday I fly. In combination with this, I will began with the idea to fly in Mars. How different are the parameters in this planet to take care in an hypothetical fly try?

First of all, the gravity. The main think that you need to fly is the lift force, to do a balanced fly the aircraft will create the same lift than weight but under an opposite direction. As Wikipedia says, the gravity in Mars is 3.69 m/s², that is to say 2.65 times less than in the Earth.

Back to the lift force. Witch other parameters have influence on it? Right now we know that with a half lift force than in the Earth you can fly in Mars, but it doesn't say that is easy to create lift to an object in Mars. The formula becames from the Bernoulli principle:

What is different in Mars? (C_L is the lift coefficient is experimentally calculated). The atmospheric density! In the Earth the density (rho) is 1.225 kg/m³, and Mars rho is 0.020 kg/m³, that is to say 61.25 times less than in the Earth. The Lift force is directly proportional to the air density. If this parameter of the formula is 60 times smaller, the other need to be increased in this order; the speed or the surface of the wing are the only options that you have.

You need a half lift force to fly in Mars, but in Mars is 60 times expensive to have lift force... Then I can deduce that is 30 times much more difficult to fly on mars...

In this las link about Mars in found too much information from this planet in comparison to the Earth values. There are curious values in the atmosphere composition. I study the Earth atmosphere composition for the fly exams, and the Mars one is really different.

The first curiosity is the most common gas: the carbon dioxide. This gas that in the Earth makes move too much ink, with the 0.038% proportion, and the responsible of the greenhouse effect, in Mars is the most common gas with the 95.32%. Far from the most common in the Earth that is the Nitrogen with the 78.084%.