I can't land at Mars need help (RSS+RO)

[berkekrkn]

Hi guys,

I start to build Mars Transfer Vehicle but first I need to design a lander. The atmosphere of Mars is really thin. I enter the atmosphere with 3200 m/s and it decelerates me to 2800m/s. I can't open the chutes btw. the vessel has 40 tonns of mass, so the chutes are useless. 

I enter the atmoshphere with 7.5 meters shield(not inflatable heatshield rather normal). Even it is useless. 

For departure from Mars I need to reserve 3.800 delta V fuel. 

1-) Is there a solution ? If not should I use some more fuel for stopping the vessel?

But then the mass of the vessel will increase to 50 tonns even I am using lh2 and lox propellant.

Edited August 19, 2016 by berkekrkn

[The Optimist]

Have you considered that maybe you're reentering at too steep an angle?

[berkekrkn]

Just now, The Optimist said:

Have you considered that maybe you're reentering at too steep an angle?

I keep periapsis at +20,000 - +40,000  meters. Also I try to waste as much time as I can in the atmosphere.

[The Optimist]

Just now, berkekrkn said:

I keep periapsis at +20,000 - +40,000  meters. Also I try to waste as much time as I can in the atmosphere.

Way too steep,  try to keep the periapsis above 50K

[berkekrkn]

1 hour ago, The Optimist said:

Way too steep,  try to keep the periapsis above 50K

Ok thanks, I did some test and it is getting better now.