Skipped re-entry?

[Pawelk198604]

I always when i send Jeb and his mates into Mun(now i don't have time for play ksp due tight schedule on my university :-( i finishing my MA, and work i hope for some free time during Easter and summer vacation after finishing MA)

During return voyage from Mun to Kerbin always put kerbal spacecraft on such trajectories that it back into space than fall into atmosphere again, i do it to make G about 6 - 8 instead 20 G i don't want harm poor Jebediah and his mates

I use this technique for a long time I thought I was brilliant

And it turned out that the Nazis already patented

They wanted to use it for their super-secret sub-orbital bomber wanted to attack the US

[Tex]

Skip re-entry is something a bit different than what I think you're thinking of.

What you're talking about sounds more like aerobraking, kinda...

Edit: I can kinda see where you're coming from. You manage to do an actual skip re-entry? I've never been able to do that!

Edited March 3, 2015 by Maximus97

[AngelLestat]

What technique are you talking about? entering with low angles??

[Pawelk198604]

I'm entering my craft into kerbin orbit than it goo up 1 km - 10 and go down again, i make it to not kill Jeb :-)

[RainDreamer]

How did you manage to skip in KSP? Was it with FAR and a lifting body design? Or were there some kind of propulsions? I haven't manage to do that stuff with capsules.

[astropapi1]

Guys, he didn't use aerodynamics, he just aerobraked so that the spacecraft would go up for a while before coming back down.

I've done it several times, generally reduces the G-Load and allows the heatshield to cool down, both things are useful when playing with Deadly Reentry.

[Sampa]

Rain, it really isn't that hard to skip, the trick is to set your periapsis so it is not too deep into the atmosphere that you land on the planet, in this case, Kerbin until you come around again for another run! Overall, this is a good way to save fuel, but, if it is a manned flight, it may not be keen (especially if you are using a life support mod like TAC Life Support). In fact, IRL, it is considered far better to reenter the atmosphere via a direct reentry and take the higher G reentry, than to risk the lives of the crew by performing a skipped reentry!

[lajoswinkler]

You can't do that in current KSP. With FAR, yes.

Rain, it really isn't that hard to skip, the trick is to set your periapsis so it is not too deep into the atmosphere that you land on the planet, in this case, Kerbin until you come around again for another run! Overall, this is a good way to save fuel, but, if it is a manned flight, it may not be keen (especially if you are using a life support mod like TAC Life Support). In fact, IRL, it is considered far better to reenter the atmosphere via a direct reentry and take the higher G reentry, than to risk the lives of the crew by performing a skipped reentry!

That's not skipping. Skipping, as Apollo did, creates lift. What you did was to delay the total reentry.

Edited March 3, 2015 by lajoswinkler

[RainDreamer]

Rain, it really isn't that hard to skip, the trick is to set your periapsis so it is not too deep into the atmosphere that you land on the planet, in this case, Kerbin until you come around again for another run! Overall, this is a good way to save fuel, but, if it is a manned flight, it may not be keen (especially if you are using a life support mod like TAC Life Support). In fact, IRL, it is considered far better to reenter the atmosphere via a direct reentry and take the higher G reentry, than to risk the lives of the crew by performing a skipped reentry!

That...is just a very long, shallow reentry. Like lajos said, it is not skipping.

Here is an image of possible entry path of a space shuttle:

A is where they perform a direct reentry from orbit, G is where the entry path is too steep and it results in bad things, C is when the entry angle is too shallow and the craft bounces off the atmosphere.

A skipping reentry is a calculated C - shallow reentry angle and use that to bounce off the upper atmosphere a few times, with every contact with the atmosphere shed a lot of energy and speed away until it approach a safe speed for normal reentry. It is a super risky move, but it will save your craft from burning up in the atmosphere when you are coming from a very high orbit going right down without spending fuel to slow yourself. My amateur understanding is that, it is different from aerobrake in that it doesn't actually enter very deep into the atmosphere and use drag to slow down. It is just skimming the top of the atmosphere, slamming its body on the atmosphere and release its energy that way.

I haven't managed to do it with a capsule alone without any sort of propulsions (might be possible to do that in KSP with just RCS?), it just doesn't have enough lift even with FAR or my capsule piloting skill is bad. With a lifting body design like space planes though, skipping is much easier.

Edited March 3, 2015 by RainDreamer

[magnemoe]

Guys, he didn't use aerodynamics, he just aerobraked so that the spacecraft would go up for a while before coming back down.

I've done it several times, generally reduces the G-Load and allows the heatshield to cool down, both things are useful when playing with Deadly Reentry.

Yes, this is very easy to do, Pe can not be to low I say above 20 km at normal speeds, if you prograde vector is above the horizon at Pe you will start to climb again, however your are still braking if Pe was above 32 km you will often get back to space but lower and your Ap drops to its inside the atmosphere and you will continue brake all the time.

[Sirrobert]

Rain, it really isn't that hard to skip, the trick is to set your periapsis so it is not too deep into the atmosphere that you land on the planet, in this case, Kerbin until you come around again for another run! Overall, this is a good way to save fuel, but, if it is a manned flight, it may not be keen (especially if you are using a life support mod like TAC Life Support). In fact, IRL, it is considered far better to reenter the atmosphere via a direct reentry and take the higher G reentry, than to risk the lives of the crew by performing a skipped reentry!

No, that's also just aerobreaking

[Sampa]

In my defense, I interperated the OP into that info'd answer!

[AngelLestat]

I'm entering my craft into kerbin orbit than it goo up 1 km - 10 and go down again, i make it to not kill Jeb :-)

Yeah I dont understand you either.

But I dont expect that it will be a new technique (which I dont know about)..

Is like maximus or others said, or you just do a first aerobraking to entering / lower your orbit, and then you make a final immersion.