Project Roskosmos "тайга" Lunar Lander

[sputnikshock]

I trust your testing. Do you happen to have a figure for the propellant used for your insertion burn (or KVTK on orbit total mass) and the mass of your payload?
If it's a lot of work for you to dig those out, don't bother. I will just assume that performance with option a) is better and that the numbers I calculated for option b) are thus conservative ones which will actually be surpassed when flying an insertion burn profile.

Apart from this I am still curious about the heatshield estimation...

 

[N_Molson]

I use 1.2 tons of LOX/LH2 to get the KVTK on a 140 x 150 km parking orbit.

The a) performance is better because the KVTK Isp is better than the Proton 3rd stage one.

Apart from this I am still curious about the heatshield estimation...

Its a "we feel it about right" estimation. If you are an expert in thermodynamics and know how to calculate the exact quantity in both mass & volume of ablative material required for the SoyuzTMA SA to survive a Lunar Reentry with some safety margin, you're welcome.

 

[sputnikshock]

Thanks alot for the numbers!
I am totally no thermodynamics expert, that's why I was asking. :lol: