-
#800
by
DaveS
on 16 Mar, 2008 19:50
-
psloss - 16/3/2008 8:27 PM
The pad was enclosed by the Mobile Service Tower and the Shuttle Assembly Building (still is, I believe).
Yes. Both are still there although the SAB has been renamed the Mobile Assembly Shelter(MAS).
-
#801
by
kneecaps
on 16 Mar, 2008 20:06
-
Patriot1776 - 11/3/2008 8:57 PM
It also makes me wonder if they use a separate, differently pitched set of tones now that can be heard in both the Shuttle FCR (FCR 3?) and FCR 1 (ISS FCR) for 'Big Loop' STS+ISS communications, so flight controllers can distinguish between inter-vehicular communications and intravehicular communications.
This isn't usually a problem because not that you hear, "Houston, Endeavour on the Big Loop" or "Houston, Endeavour on Air to Ground 1". This is so there is no confusion about what loop is being used.
The flight controllers do the same too, if you are on L2 take a look at the STS-92 MCC video, you hear lots of "Flight, F(I)DO on the MOCR DYN" etc etc, these are the users actually identifying which loop they are using so the receiving party knows which to reply on.
-
#802
by
scienceguy
on 17 Mar, 2008 03:40
-
How much fuel (in terms of mass of both LOX and LH2) does the space shuttle burn per second?
-
#803
by
tva
on 17 Mar, 2008 11:06
-
Columbia broke apart after plasma entering into a hole on the wing and weakening it.
The prossess was going on for 10-15 minuttes before the first anomalies (loss of diferent sensor readings).
How much structural damage was likely to happen on ride uphill ? I know that the density of the atmosphere is quickly diminishing during ascent. But MECO occurs below EI-altitude !
What are the thermal loads on the TPS when you compare ascent anf descent ?
-
#804
by
Jim
on 17 Mar, 2008 11:12
-
much lower
-
#805
by
mkirk
on 18 Mar, 2008 11:18
-
scienceguy - 16/3/2008 11:40 PM
How much fuel (in terms of mass of both LOX and LH2) does the space shuttle burn per second?
The Space Shuttle Main Engines SSMEs each burn approximately 1089 lbs of propellant per second at the 104.5% power level. The oxygen to hydrogen ratio is 6.03 to 1. Liquid Oxygen enters the engine at rate of about 934 lbs/sec and liquid hydrogen at 155 lbs/sec.
This is not a parameter the crew can monitor from the shuttle’s cockpit (which is my area of alleged expertise) – unlike fuel flow on a jet which is often a surrogate for engine power settings. However, the Booster Console and his back room controllers in Mission Control can monitor flow rates in gallons and pounds per second.
I may be able to dig up a more precise chart from my notes that will show the nominal flow rates for the various shuttle main engine power settings if you give me some time.
Mark Kirkman
-
#806
by
Jim
on 18 Mar, 2008 12:20
-
Gary - 18/3/2008 8:23 AM
What sort of re-entry heating are the SRB's subjected to after seperation? From recent threads and an L2 video it seems they go through higher temps than I assumed. Thanks.
they really don't "reenter" since they don't leave the atmosphere (peak alt approx 220k ft). They are going hypersonic and hence the heating.
-
#807
by
scienceguy
on 18 Mar, 2008 17:52
-
mkirk - 18/3/2008 6:18 AM
scienceguy - 16/3/2008 11:40 PM
How much fuel (in terms of mass of both LOX and LH2) does the space shuttle burn per second?
The Space Shuttle Main Engines SSMEs each burn approximately 1089 lbs of propellant per second at the 104.5% power level. The oxygen to hydrogen ratio is 6.03 to 1. Liquid Oxygen enters the engine at rate of about 934 lbs/sec and liquid hydrogen at 155 lbs/sec.
This is not a parameter the crew can monitor from the shuttle’s cockpit (which is my area of alleged expertise) – unlike fuel flow on a jet which is often a surrogate for engine power settings. However, the Booster Console and his back room controllers in Mission Control can monitor flow rates in gallons and pounds per second.
I may be able to dig up a more precise chart from my notes that will show the nominal flow rates for the various shuttle main engine power settings if you give me some time.
Mark Kirkman
Thank you. All I wanted was a ballpark figure.
-
#808
by
markius
on 20 Mar, 2008 18:17
-
I've read that passengers on the Space Shuttle are allowed to take iPods on-board but that the lithium-ion batteries must be replaced with specially certified alkaline batteries:
http://gizmodo.com/368351/ipod-pictured-onboard-space-shuttle-endeavourMy question, is there a specific risk with lithium-ion batteries or simply that they have not been tested/certified for use?
Thanks
Mark
-
#809
by
tnphysics
on 21 Mar, 2008 18:40
-
Battery fires.
-
#810
by
tnphysics
on 21 Mar, 2008 18:40
-
Battery fires.
-
#811
by
brahmanknight
on 21 Mar, 2008 18:54
-
I know the hammerhead crane at the top of LC 39 A and B was removed, and when a crane is need, one is brought in to do the work. My question is what operations require a crane at the pads?
-
#812
by
markius
on 21 Mar, 2008 22:58
-
tnphysics - 21/3/2008 7:40 PM Battery fires.
Thanks. Does the same restriction apply to all rechargables? If I remember, most rechargables have a low internal resistance and can therefore get very hot when shorted.
-
#813
by
Jim
on 22 Mar, 2008 01:38
-
brahmanknight - 21/3/2008 3:54 PM
I know the hammerhead crane at the top of LC 39 A and B was removed, and when a crane is need, one is brought in to do the work. My question is what operations require a crane at the pads?
maintenance
-
#814
by
DaveS
on 22 Mar, 2008 08:32
-
Jim - 22/3/2008 3:38 AM
brahmanknight - 21/3/2008 3:54 PM
I know the hammerhead crane at the top of LC 39 A and B was removed, and when a crane is need, one is brought in to do the work. My question is what operations require a crane at the pads?
maintenance
And lifting off all the equipment on the Level 0 deck of the MLP following rollout. Some of that equipment isn't removed until very shortly before RSS move to "Park" position prior to launch.
-
#815
by
SiameseCat
on 23 Mar, 2008 02:26
-
Is there a way to disable the RMS hand controllers? (i.e. something similar to the FLT CNTLR POWER switches)
-
#816
by
Jorge
on 23 Mar, 2008 02:59
-
SiameseCat - 22/3/2008 10:26 PM
Is there a way to disable the RMS hand controllers? (i.e. something similar to the FLT CNTLR POWER switches)
Yes. The hand controllers are not used in the automatic and single-joint modes. (They are only used in the "manual augmented" modes and the TEST mode). The hand controllers are unpowered completely if RMS power is switched to BACKUP.
-
#817
by
Lee Jay
on 23 Mar, 2008 19:18
-
-
#818
by
DaveS
on 23 Mar, 2008 20:34
-
-
#819
by
Firestarter
on 25 Mar, 2008 16:34
-
http://www.nasaspaceflight.com/content/?cid=5388 Chris writes about something called CSCS and explains it well, but what happens if LON was called, the shuttle crew stay on the ISS and wait for another shuttle, but in the meantime, something goes badly wrong with the ISS. How do they evacute with only one Soyuz?