Flight Question Reentry from the moon

[carfoggia22]

Hello!
I downloaded Orbiter a couple of weeks ago. I can get in orbit, dock to the ISS, reenter from a normal height, and set TransX to go to the Moon. The problem is that when I try to get back home, i try the method I use to land from LEO, and I get back into space. Then, how do I reenter from the Moon?

Inviato dal mio GT-I9060I

 

[boogabooga]

Try the re-entry "upside-down".

 

[Urwumpe]

Try the re-entry "upside-down".

And don't forget to return to heads-up when acceleration exceeds your limits.

Essentially you bank around wildly to stay in a narrow corridor that allows you to return without overheating or exceeding acceleration.

 

[carfoggia22]

Thanks, I'll try

Inviato dal mio GT-I9060I

 

[STS]

Need more info: What is your method to 'Land from LEO'?

And how do yo perform the TEI?

 

[Lmoy]

And how do yo perform the TEI?

TEI is easiest if you're between the moon and Earth. If you're orbiting prograde around the moon and burn prograde when orbiting around the Earth-facing side of the moon, this will simultaneously increase your speed relative to the moon, and decrease it relative to Earth. Besides that, TEI is pretty easy, because you're already orbiting the Earth, so when you fall out of the moon's SOI you're already heading back home.

 

[STS]

TEI is easiest if you're between the moon and Earth. If you're orbiting prograde around the moon and burn prograde when orbiting around the Earth-facing side of the moon, this will simultaneously increase your speed relative to the moon, and decrease it relative to Earth. Besides that, TEI is pretty easy, because you're already orbiting the Earth, so when you fall out of the moon's SOI you're already heading back home.

Yes, yes I know.

I was asking to the OP, how he performs it, because there are several ways, and for beginners, it takes a bit of TransX practice to understand it.

 

[Ripley]

...TEI is pretty easy, because you're already orbiting the Earth...

Indeed: anyone remember this?

 

[Lmoy]

Yes, yes I know.

I was asking to the OP, how he performs it, because there are several ways, and for beginners, it takes a bit of TransX practice to understand it.

Oh, haha. I wasn't really paying attention to the poster, thought it was the OP. Silly me.

 

[carfoggia22]

Need more info: What is your method to 'Land from LEO'?

And how do yo perform the TEI?

I land from LEO lowering my perigee to 55 km, gliding all around the Earth, and then following VOR to land.

For the TEI, If I'm in a prograde orbit, I burn prograde when I'm between Moon and Earth, if I'm in a retrograde orbit I burn prograde above the Far Side of the Moon

Inviato dal mio GT-I9060I

 

[blixel]

Hello!
I downloaded Orbiter a couple of weeks ago. I can get in orbit, dock to the ISS, reenter from a normal height, and set TransX to go to the Moon. The problem is that when I try to get back home, i try the method I use to land from LEO, and I get back into space. Then, how do I reenter from the Moon?

I think I understand what you are experiencing. Basically it sounds like you are "skipping" off the atmosphere and heading back out into space. When coming back from the moon, your velocity is so high that you are presented with new challenges with regards to landing and/or establishing a normal 200x200km orbit.

There are a few options available to you, but it sounds like you're interested in using the atmosphere as a brake (a great choice). Check out the video below to see one idea you can try. Note this is just one method. There are other methods you could try.

Skip to 15 minutes since your concern is just how to re-enter without skipping back out into space. You'll get the idea within 5 or 6 minutes so just watch from the 15 minute mark to say 20 minutes.

I'll give you an example for another approach you can take which gives you much faster braking, but is a bit more technical so it can be harder to pull off successfully.

 

[carfoggia22]

Ok, I tried the reentry but my ship at a certain point becomes unresponsive and rolls up, slightly banked to the left, with a high AoA. What is the problem?

 

[Urwumpe]

Ok, I tried the reentry but my ship at a certain point becomes unresponsive and rolls up, slightly banked to the left, with a high AoA. What is the problem?

What do you mean with "unresponsive" and "rolls up", can you describe the trajectory more precise?

Maybe record a flight in Orbiter with the FlightRecorder tool and save the file, so you can post the flight data into the thread (with code tags)?

 

[carfoggia22]

Rolls up means "bank angle parallel to horizon and pilot's head pointing away from earth" unresponsive means I can't pitch, yaw or roll it

 

[Urwumpe]

Rolls up means "bank angle parallel to horizon and pilot's head pointing away from earth" unresponsive means I can't pitch, yaw or roll it

Automatically? I mean, even if you try to bank, it does not react at all?

 

[carfoggia22]

Exactly

 

[Urwumpe]

Exactly

Strange, sounds like you have an autopilot active. Do you use any add-ons or plugins?

 

[carfoggia22]

Attitude mfd, I can try with a fresh install, would that help?

 

[Urwumpe]

Attitude mfd, I can try with a fresh install, would that help?

You could also just disable it.

Which spacecraft do you use?

 

[boogabooga]

Ok, I tried the reentry but my ship at a certain point becomes unresponsive and rolls up, slightly banked to the left, with a high AoA. What is the problem?

Are you using the deltaglider? It sounds like you tore off your elevons. Try it again but turn "damage and failure simulation" off.