-
#1180
by
MKremer
on 24 Oct, 2007 05:58
-
I think it would be really interesting to find out what the actual positions would be:
the orbiter is making an OMS burn - accelerating for a couple minutes before coasting and decelerating into its larger orbit...
the tank is starting to accelerate via gravity on its ballistic reentry path down, but will start to encounter higher atmospheric density which will start to slow it while also affecting it via rapid heating
-
#1181
by
LSainsbury
on 24 Oct, 2007 08:21
-
-
#1182
by
rfoshaug
on 24 Oct, 2007 12:23
-
According to Wikipedia (i know, i know...), the External Tank holds 106,261 kg of LH2 and 629,340 kg of LOX at liftoff for a total of 735,601 kg of propellants.
Does anyone know how much propellants that normally remain in the tank after MECO? How much reserve propellants do they carry, and does this amount vary much from mission to mission?
-
#1183
by
cozmicray
on 24 Oct, 2007 17:15
-
-
#1184
by
nathan.moeller
on 24 Oct, 2007 17:40
-
rfoshaug - 24/10/2007 7:23 AM
According to Wikipedia (i know, i know...), the External Tank holds 106,261 kg of LH2 and 629,340 kg of LOX at liftoff for a total of 735,601 kg of propellants.
Does anyone know how much propellants that normally remain in the tank after MECO? How much reserve propellants do they carry, and does this amount vary much from mission to mission?
I don't have time to do the math, but I once heard that the SSMEs normally shut down when the tank's fuel level reaches about 2%.
-
#1185
by
Jorge
on 24 Oct, 2007 17:54
-
nathan.moeller - 24/10/2007 12:40 PM
rfoshaug - 24/10/2007 7:23 AM
According to Wikipedia (i know, i know...), the External Tank holds 106,261 kg of LH2 and 629,340 kg of LOX at liftoff for a total of 735,601 kg of propellants.
Does anyone know how much propellants that normally remain in the tank after MECO? How much reserve propellants do they carry, and does this amount vary much from mission to mission?
I don't have time to do the math, but I once heard that the SSMEs normally shut down when the tank's fuel level reaches about 2%.
The SSMEs normally shut down at a MECO target velocity, not prop level. They also shut down if the ECO sensors go dry but that's lower than 2%.
ET residual prop statistics for the first 100 flights are in Jenkins, 3rd ed, p. 332. I don't know of an online source of this data.
-
#1186
by
Avron
on 25 Oct, 2007 04:04
-
MKremer - 24/10/2007 1:58 AM
I think it would be really interesting to find out what the actual positions would be:
the orbiter is making an OMS burn - accelerating for a couple minutes before coasting and decelerating into its larger orbit...
the tank is starting to accelerate via gravity on its ballistic reentry path down, but will start to encounter higher atmospheric density which will start to slow it while also affecting it via rapid heating
A min - max range/angle plot would be really interesting..
-
#1187
by
spaceshuttle
on 25 Oct, 2007 06:07
-
On the SRBs during rollout, what are the yellow boxes near the nose for?
-
#1188
by
DaveS
on 25 Oct, 2007 08:27
-
spaceshuttle - 25/10/2007 8:07 AM
On the SRBs during rollout, what are the yellow boxes near the nose for?
They're GSE acccess doors for the S&A devices. For flight, they're removed and replaced with white flight doors.
-
#1189
by
LSainsbury
on 25 Oct, 2007 10:51
-
-
#1190
by
Real Madrid
on 25 Oct, 2007 12:07
-
what happens there with the space shuttle in 2010, after the last mission?
-
#1191
by
DaveS
on 25 Oct, 2007 12:29
-
Real Madrid - 25/10/2007 2:07 PM
what happens there with the space shuttle in 2010, after the last mission?
The orbiters will be museum items. Try doing a search for "orbiter retirement".
-
#1192
by
Real Madrid
on 25 Oct, 2007 12:37
-
DaveS - 25/10/2007 2:29 PM
Real Madrid - 25/10/2007 2:07 PM
what happens there with the space shuttle in 2010, after the last mission?
The orbiters will be museum items. Try doing a search for "orbiter retirement".
why museum items?
-
#1193
by
DaveS
on 25 Oct, 2007 12:39
-
Real Madrid - 25/10/2007 2:37 PM
DaveS - 25/10/2007 2:29 PM
Real Madrid - 25/10/2007 2:07 PM
what happens there with the space shuttle in 2010, after the last mission?
The orbiters will be museum items. Try doing a search for "orbiter retirement".
why museum items?
What else? NASA has always donated stuff they no longer use to the NASM. See Enterprise.
-
#1194
by
Real Madrid
on 25 Oct, 2007 12:42
-
DaveS - 25/10/2007 2:39 PM
Real Madrid - 25/10/2007 2:37 PM
DaveS - 25/10/2007 2:29 PM
Real Madrid - 25/10/2007 2:07 PM
what happens there with the space shuttle in 2010, after the last mission?
The orbiters will be museum items. Try doing a search for "orbiter retirement".
why museum items?
What else? NASA has always donated stuff they no longer use to the NASM. See Enterprise.
okay,
-
#1195
by
LSainsbury
on 25 Oct, 2007 14:35
-
pad rat - 24/10/2007 2:59 PM
That's the pull handle for jettisoning the overhead window for ground escape.
Ahh I see...hence the warning / danger type layout!
-
#1196
by
Danny Dot
on 25 Oct, 2007 15:49
-
Is it just me or has NASA gone down the path of "We don't know what it is, but it hasn't killed us yet"? Gerstenmaier is quoted in Av Week saying this almost verbatim while discussing the wing leading edge issue.
Danny Deger
-
#1197
by
rdale
on 25 Oct, 2007 15:57
-
I think that was rehashed over and over when the issue came up if you search the old threads. That's all opinion based. If you want them to shut down the shuttle until it's 100% safe, it'll be a long shutdown.
-
#1198
by
Danny Dot
on 25 Oct, 2007 17:06
-
rdale - 25/10/2007 10:57 AM
I think that was rehashed over and over when the issue came up if you search the old threads. That's all opinion based. If you want them to shut down the shuttle until it's 100% safe, it'll be a long shutdown.
Can you point me to those threads? I looked but couldn't find them. Even if it has been discussed in the past, the quotes from Gerstemaier in Av Week is new information.
Danny Deger
-
#1199
by
rdale
on 25 Oct, 2007 17:08
-
Maybe they were in L2. The quotes from Gerst came from the press conference last week, so that's not really new either...