Flight Question AMSO Reentry

[chobolatom]

Hi! I started AMSO - Apollo 11 scenario and with TransX I go to the Moon. When I reached Moon orbit I make retro-grade burn and brake to save the orbit. Then I undock Eagle because I won't land on the Moon. Now I want get back to the Earth and make reentry. I use TransX to get to the Earth but when I hit the atmosfere, I will die. I hit atmosfere by 10,5 km/s. Can you please help with this? I don't know, how surivive reentry. I won't use IMDF. Do you have any idea for help? :shrug:

Thanks

 

[Mantis]

If you have something against IMFD, you probably won't like Lunar Transfer MFD either (which is based on IMFD). It has a TEI auto-pilot with a re-entry function that allows you to select a re-entry angle, etc.

 

[chobolatom]

If you have something against IMFD, you probably won't like Lunar Transfer MFD either (which is based on IMFD). It has a TEI auto-pilot with a re-entry function that allows you to select a re-entry angle, etc.

Yes, I know but I want something which I can control angle of reentry and time of reentry and and so on. But I won't IMFD. But thanks for reply.

 

[Pyromaniac605]

Yes, I know but I want something which I can control angle of reentry and time of reentry and and so on. But I won't IMFD. But thanks for reply.

Why won't you use IMFD? There aren't any problems with it that are worth not using it at all over.

Try Aerobrake MFD, that might help you out. (Not sure as I don't really use it myself)

 

[chobolatom]

The first reason is that I would like to use just TransX and possibly a smaller add-on for reentry. The second reason is that I would like to do the tutorial mission Apollo 11 or 12 without use IMFD because the tutorial using this add-on is already here.

Thanks for reply.

 

[Pyromaniac605]

The first reason is that I would like to use just TransX and possibly a smaller add-on for reentry. The second reason is that I would like to do the tutorial mission Apollo 11 or 12 without use IMFD because the tutorial using this add-on is already here.

Thanks for reply.

Well, I suppose that's fair enough.

But I would definitely give Aerobrake a try, I've used it a few times and it works well for (relatively) accurate re-entry.

 

[chobolatom]

Well, I suppose that's fair enough.

But I would definitely give Aerobrake a try, I've used it a few times and it works well for (relatively) accurate re-entry.

Ok, I used Areobrake MFD before half of year with DG4. But when I will go to the Earth orbit with CSM, I don't have enough fuel to brake and make deorbit burn. I need go trought the atmosfere right now without brakeing and etc. Can I do this with Areobrake MFD?

 

[Cras]

Aerobrake should help you get to the landing site, helps with the pitch adjustments in the entry interface and is a better judge of where you will splash down than Map MFD.

I have never used Aerobrake MFD myself for AMSO (which I am also quite new too as well), only used Aerobrake for the DGIV and XR2. For AMSO I have pretty much only used LT-MFD which allows one to have a lot of control of WHEN the ship will reach certain points, very useful when trying to fly the missions by the historical timeline.

 

[chobolatom]

Aerobrake should help you get to the landing site, helps with the pitch adjustments in the entry interface and is a better judge of where you will splash down than Map MFD.

I have never used Aerobrake MFD myself for AMSO (which I am also quite new too as well), only used Aerobrake for the DGIV and XR2. For AMSO I have pretty much only used LT-MFD which allows one to have a lot of control of WHEN the ship will reach certain points, very useful when trying to fly the missions by the historical timeline.

Ok, I can use this or IMFD ,but existing something else? No LTMFD, no IMFD, something another?

 

[HAL9001]

I use the Orbit-MFD periapsis-altitude counter and later when I'm near enugh for this to work, and I make corrections the Aerobrake-MFD.

 

[Tommy]

I'm not overly familiar with TransX, but it should be possible. If TransX can show you the Latitude and Longitude of your periapsis, and your heading at periapsis, you'll be fine. You can control the re-entry angle by adjusting the PeA - try about 70km altitude. If you survive that, you'll just need to adjust the longitude and latitude by trial and error to see how far the capsule travels past periapsis. Once you know that, you should be able to re-enter with reasonable precision.

AerobrakeMFD can be used to verify your landing - when you are still above 200k altitude it will show a purely ballistic trajectory (no aerodynamics considered), which is fairly close to what a capsule does.

 

[chobolatom]

I'm not overly familiar with TransX, but it should be possible. If TransX can show you the Latitude and Longitude of your periapsis, and your heading at periapsis, you'll be fine. You can control the re-entry angle by adjusting the PeA - try about 70km altitude. If you survive that, you'll just need to adjust the longitude and latitude by trial and error to see how far the capsule travels past periapsis. Once you know that, you should be able to re-enter with reasonable precision.

AerobrakeMFD can be used to verify your landing - when you are still above 200k altitude it will show a purely ballistic trajectory (no aerodynamics considered), which is fairly close to what a capsule does.

Ok, i try it. Thanks.

---------- Post added at 07:44 AM ---------- Previous post was at 06:15 AM ----------

I try it but how can I get Earth to my TransX screen. Grey circle with green trajectory. Do you know what I mean?

---------- Post added at 01:09 PM ---------- Previous post was at 07:44 AM ----------

Do you have any ideas or tips, please?

 

[Tommy]

There are some very good tutorials for TransX tutorials here:

http://www.flytandem.com/orbiter/tutorials/video/index.htm

I seem to recall something about creating a "surrogate" vessel in LEO which you use as a target - but I'm not real familiar with TransX.

 

[chobolatom]

With TransX I can work, but I do not know how to survive reentry. Every time you hit the atmosphere, I have very sharp angle and I die. :-(

 

[PeriapsisPrograde]

With TransX I can work, but I do not know how to survive reentry. Every time you hit the atmosphere, I have very sharp angle and I die. :-(

Course corrections. You don't need the SM during reentry, so use its last drop of fuel.

 

[chobolatom]

Course corrections. You don't need the SM during reentry, so use its last drop of fuel.

I know I don't need SM during reentry, if I make Retro Grade burn somewhere 11000 km altitude and I am burn up again.

 

[agentgonzo]

I know I don't need SM during reentry, if I make Retro Grade burn somewhere 11000 km altitude and I am burn up again.

If you burn up at 10.5km/s you're coming in at too steep an angle. The Apollo CM was designed to withstand these temperatures. Your perigee before entry interface should be 50-60km. Any lower and you'll come in too steeply and burn up. I assume this is what you are doing. Do not just aim for the centre of the planet and expect to survive.

 

[Mantis]

I usually aim for a periapsis of around 48k and it works very well for me. I also engage the retrograde hold autopilot until just before 150 km alt. Once you hit 150k, the descent autopilot will take over and bring you down safely.

 

[chobolatom]

Do you using TransX? I try it. Thanks!

 

[agentgonzo]

I've used both transx and ltmfd to do lunar reentries