Skyler4856

For Questions That Don't Merit Their Own Thread

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If the seat belts are fastened - no.
If not - then the loader has more room to fly than the driver.

Edited by kerbiloid

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3 hours ago, kerbiloid said:

If the seat belts are fastened - no.
If not - then the loader has more room to fly than the driver.

LMAO you made my day :D

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How to make winter finally come to Moscow?

Our top men are on the case!

 

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Tomorrow night (said tonight by mistake):

 

Edited by tater

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Anybody know where the "best" part of the atmosphere to renter is (or at least best place to burn off the most velocity)?   Is it the mesopause (lowest temperature, about 200K) or the stratopause (higher temperature ~275K, but more than twice the pressure).  I suspect the stratopause, considering that all that heat comes from adiabatic heating.  If they reach nearly the same pressure, you will be cooler in the stratopause (don't know if they will reach the same pressure).   Or do you often have somewhere between each the "best" place?

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2 hours ago, wumpus said:

Anybody know where the "best" part of the atmosphere to renter is (or at least best place to burn off the most velocity)?   Is it the mesopause (lowest temperature, about 200K) or the stratopause (higher temperature ~275K, but more than twice the pressure).  I suspect the stratopause, considering that all that heat comes from adiabatic heating.  If they reach nearly the same pressure, you will be cooler in the stratopause (don't know if they will reach the same pressure).   Or do you often have somewhere between each the "best" place?

Depends. Are you more worried about g-loading or shedding heat?

If it's heat you are worried about, go steep and get to the thicker air ASAP, but accept you will get massive g-loading. You'll dump your energy quickly, which will mean you shed your heat before a lot of it can transfer to the re-entry vehicle.

If g-loading is a concern, go shallow. But in that case, you'll experience a much longer time in the heating window, which will transfer more heat to your re-entry vehicle (so you need better heat shielding).

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No bueno:

 

Up that tweet thread:

 

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1 hour ago, tater said:

No bueno:

This is how I imagine it now:

scale_1200

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Edited by tater

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It happened or it didn't...

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38 minutes ago, tater said:

 

that's a relief, I wonder what would have happened if they did collide. Probably not much.

Spoiler

or a lot!

 

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Quote

47 meter predicted miss distance

The word "miss" looks wonderful in this context...

Btw, which result we should treat as "successful"?

Edited by kerbiloid

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6 minutes ago, kerbiloid said:

Btw, which result we should treat as "successful"?

If the weather prediction says 40% chance of rain, was it wrong if it does rain? How about if it doesn't rain, was it wrong then?

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6 minutes ago, mikegarrison said:

If the weather prediction says 40% chance of rain, was it wrong if it does rain? How about if it doesn't rain, was it wrong then?

Did we "aim" to say "miss"?

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On 1/28/2020 at 4:29 PM, wumpus said:

Anybody know where the "best" part of the atmosphere to renter is (or at least best place to burn off the most velocity)?   Is it the mesopause (lowest temperature, about 200K) or the stratopause (higher temperature ~275K, but more than twice the pressure).  I suspect the stratopause, considering that all that heat comes from adiabatic heating.  If they reach nearly the same pressure, you will be cooler in the stratopause (don't know if they will reach the same pressure).   Or do you often have somewhere between each the "best" place?

Re-entry is so energetic that temperature of atmosphere makes almost no difference at all. Only density. All of the interesting things are happening in the shockwave, and its temperature is basically determined by density and speed of the craft. Shape also plays a role there, but maintaining a dense, slow moving (relative to the craft) shockwave far ahead of the shield is more important, so blunt shapes are practically universal. @mikegarrison covered the rest in his reply.

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