Flight Question Aerobraking on earth is hard

[Grover]

I found an easy (but slow) way to do an aerobrake to reduce orbital velocity,
Aim for 71KM PeA then do about 10°AOA flight with 180° roll, aim to have no vertical velocity.

As your speed decreases, you will be able to go lower into the atmosphere, go too high and you wont be able to stay down, keep your hull temperatures high to dissapate your energy faster and reduce the risk of falling out of tne atmosphere.

With a little practice (and alot of patience, it tales a long time to slow down from 10 km/s) youll be able to fo it and then shoot out of the atmosphrlere with an ApA of 300k.

Good luck!

 

[n72.75]

As long as you are at a low enough altitude such that you can achieve a Cl_max that can generate a lifting force that can balance centrifugal forces(fictional I know), and have a high enough altitude such that you don't burn up.

All you have to do is keep your vertical speed zero and thus your altitude constant. Eventually you will slow down.

At 80km and 15km/s, assuming your vessel can generate enough inverse lift, it will take you quite a long time.

 

[Rtyh-12]

this will be fun to pull this on orbiter. Is it possible to do this at a super hyperbolic speed, like a high DV sling like a Neptune>Jupiter>Saturn>Mars>Venus>Mercury>Venus>Earth. I would like to know how to capture the atmosphere there because i will not even have enough fuel for the de-orbit burn because i will be at such a high velocity. i would probably aim for 120k

You can't do that, AFAIK you can't sling past all the planets. But worry not, because a sling past all the outer planets is more than enough. But 120 k? That's waaaaay too much. Even at that speed, you still would experience little, if any, drag. 75-80 k would be much safer.

Also, be sure to make the aerocapture correctly, because otherwise you'll fly into outer space, never to return.

 

[Bonanza123d]

Going to try that planetary pinball later tonight. See if i can get enough of a sling and have enough of a high velocity to aerobrake.

 

[Tommy]

Here is a tutorial on the inverted re-entry in an XR-2:

[ame="http://www.orbithangar.com/searchid.php?ID=3660"]Home Direct[/ame]

NOTE: AoA autopilots don't work while inverted, in the XR series vessels a high AoA can be maintained using COG shifting and elevator trim. In a DGIV, the high AoA cannot be maintained but the aerocapture can still be performed using a low (inverted) AoA maintained using elevator trim - but it will take much longer since you won't be braking as quickly.