Is there anything need to be jealous of?

Russian tried skip reentry, and it didn't really help them. It didn't live up to its promise. Apollo reentry pods built in with skip reentry capability, but the computation didn't show it had any advantage. Skip reentry is supposed to lower the temperature of the reentry vehicle, but the problem is that, when the reentry is interrupted, the SV raises up of the atmosphere, and without air there is nothing to really cool it down. As radiative cooling is only effective when the temperature is too high for SV structure. Hence the SV isn't cooling down when it skipped back to orbit. There is no distinct advantage for heat and high g. Apollo optioned not to use it, but had a better heat shield, Russian never did have manned mission to moon, and all their moon mission tried skip reentry. That should tell people something.

Also, just a reminder, Mars mission all uses more sophesticated aerobraking, on Mars. There isn't much to boast about this skip reentry.

所有跟帖： 

• thanks for sharing some of the technical details. good to know. -复兴儒学- ♂ (6 bytes) () 11/03/2014 postreply 11:36:36

• By using the skip is to slow the speed and not cooling the heat. -elite333- ♀ (132 bytes) () 11/03/2014 postreply 12:23:08

• You are getting funny. -应犹在-- ♂ (38845 bytes) () 11/03/2014 postreply 14:51:18

• physics: conservation of energy. -bi-elliptic- ♂ (0 bytes) () 11/03/2014 postreply 15:31:01

• Physics 101: Frictions. -应犹在-- ♂ (72 bytes) () 11/03/2014 postreply 15:34:03

• it is called drag in aerodynamic, not friction. -bi-elliptic- ♂ (0 bytes) () 11/04/2014 postreply 08:30:39

• LOL, show me an aerodynamic drag example w/o friction then! -应犹在-- ♂ (72 bytes) () 11/04/2014 postreply 09:23:11

• skin friction is only a component of drag. -bi-elliptic- ♂ (357 bytes) () 11/04/2014 postreply 10:48:55

• Can't you answer my question? -应犹在-- ♂ (1533 bytes) () 11/04/2014 postreply 11:02:03

• Vérifier ma réponse, SVP. -应犹在-- ♂ (1485 bytes) () 11/03/2014 postreply 13:34:48