Question Q/A's FOR STS - Page 2 - Orbiter-Forum

unknown · 03-31-2008, 09:02 AM

OK, it's exhaust gas.

ryan · 03-31-2008, 09:18 AM

But that Hydrizan can be nasty stuff.

DaveS · 03-31-2008, 09:23 AM

Quote:

Originally Posted by ryan

But that Hydrizan can be nasty stuff.

It's spely hydrazine, not hydrizan.

ryan · 03-31-2008, 09:24 AM

Sorry.

**Urwumpe** · 03-31-2008, 09:44 AM

Hydrazine is toxic, but otherwise a fairly user-friendly rocket fuel. You only need a catalyst coating in the chamber, ignition happens automatically if the catalyst has the right temperature.

The Shuttle also has a proposed update to replace the APUs by something less toxic - but that will never come now.

EDIT: BTW, There was once a APU fire in one of the Shuttles. In STS-9, one of the first flights, two APUs failed "under-speed" shortly after landing.

What this means in reality:

Quote:

Six minutes and fifty seconds after the Orbiter landed, APU (auxiliary power unit) -1 shut down automatically because of a turbine under-speed condition. Four minutes and twenty-four seconds later, a detonation occurred in APU-1, simultaneous with an automatic shutdown of APU-2, also the result of a turbine under-speed condition. Fourteen minutes and forty-two seconds after APU-2 shutdown, a detonation occurred on APU-2. APU-3 ran normally until the crew shut down the unit approximately 12 minutes after landing.

http://www.jsc.nasa.gov/news/columbia/anomaly/STS9.pdf

The cause was hydrazine leaking as early as 17 minutes after starting the APUs for reentry.

DaveS · 03-31-2008, 10:09 AM

Quote:

Originally Posted by Urwumpe

Hydrazine is toxic, but otherwise a fairly user-friendly rocket fuel. You only need a catalyst coating in the chamber, ignition happens automatically if the catalyst has the right temperature.

The Shuttle also has a proposed update to replace the APUs by something less toxic - but that will never come now.

Yes the Electric APUS(EAPUs). There was also a proposal to replace the OMS/RCS with a non-toxic version that would use LOX and ethanol as the propellants instead of MMH and N204.

unknown · 03-31-2008, 10:57 AM

Who are the female commanders of Space Shuttle missions since STS-1?

**Urwumpe** · 03-31-2008, 11:15 AM

Quote:

Originally Posted by unknown

Who are the female commanders of Space Shuttle missions since STS-1?

Only Eileen Collins and Pamela Melroy.

unknown · 03-31-2008, 01:43 PM

Who are the space shuttle astronauts died as of March 31, 2008 excluding STS-51L and STS-107?

**Urwumpe** · 03-31-2008, 02:10 PM

David Griggs, STS-51-D, died in 1989, killed in a crash with a historic WW2 training plane.
Karl Gordon Henize, STS-51-F, died in 1993, because of heart failure while climbing Mount Everest.
Robert F Overmyer, STS-5 and STS-51-B, died 1996, in a crash while testing the Cirrus VK-30 light aircraft.
Charles L Veach, STS-39 and STS-52, died of cancer in 1995.
David M Walker, STS-51-A, STS-30, STS-53 and STS-69, died in 2001, after a brief and sudden illness.

unknown · 03-31-2008, 02:45 PM

I have another person died, G. David Low, STS-32, STS-43, STS-57, died on March 15, 2008, due to colon cancer.

Thanks Urwumpe, you are very smart.

unknown · 04-01-2008, 08:55 AM

Who are the persons of Space Shuttle before STS-1?

**Urwumpe** · 04-01-2008, 09:00 AM

Quote:

Originally Posted by unknown

Who are the persons of Space Shuttle before STS-1?

Except the many thousand engineers, I can't name?

Of the Approach and Landing Tests with Enterprise:

Crew 1:
Fred W. Haise, Jr.
C. Gordon Fullerton

Crew 2:
Joseph H. Engele
Richard H. Truly.

unknown · 04-01-2008, 09:10 AM

Quote:

Except the many thousand engineers, I can't name?

Of the Approach and Landing Tests with Enterprise:

Crew 1:
Fred W. Haise, Jr.
C. Gordon Fullerton

Crew 2:
Joseph H. Engele
Richard H. Truly.

Congratulations, Urwumpe, you are very smart.

myles · 04-01-2008, 09:55 AM

If anyone's interested, I found these really cool docs:

http://www.fiddes.us/shuttle/RTLS.pdf

http://www.fiddes.us/shuttle/ATOAOA.pdf

Check out their site:

http://www.fiddes.us/

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03-31-2008, 09:02 AM	#16
unknown Orbinaut	OK, it's exhaust gas.

03-31-2008, 09:18 AM	#17
ryan That guy	But that Hydrizan can be nasty stuff.

03-31-2008, 09:23 AM	#18
DaveS SSU GSE Specialist	Quote: Originally Posted by ryan But that Hydrizan can be nasty stuff. It's spely hydrazine, not hydrizan.

03-31-2008, 09:44 AM	#20
Urwumpe Donator	Hydrazine is toxic, but otherwise a fairly user-friendly rocket fuel. You only need a catalyst coating in the chamber, ignition happens automatically if the catalyst has the right temperature. The Shuttle also has a proposed update to replace the APUs by something less toxic - but that will never come now. EDIT: BTW, There was once a APU fire in one of the Shuttles. In STS-9, one of the first flights, two APUs failed "under-speed" shortly after landing. What this means in reality: Quote: Six minutes and fifty seconds after the Orbiter landed, APU (auxiliary power unit) -1 shut down automatically because of a turbine under-speed condition. Four minutes and twenty-four seconds later, a detonation occurred in APU-1, simultaneous with an automatic shutdown of APU-2, also the result of a turbine under-speed condition. Fourteen minutes and forty-two seconds after APU-2 shutdown, a detonation occurred on APU-2. APU-3 ran normally until the crew shut down the unit approximately 12 minutes after landing. http://www.jsc.nasa.gov/news/columbia/anomaly/STS9.pdf The cause was hydrazine leaking as early as 17 minutes after starting the APUs for reentry.

03-31-2008, 10:09 AM	#21
DaveS SSU GSE Specialist	Quote: Originally Posted by Urwumpe Hydrazine is toxic, but otherwise a fairly user-friendly rocket fuel. You only need a catalyst coating in the chamber, ignition happens automatically if the catalyst has the right temperature. The Shuttle also has a proposed update to replace the APUs by something less toxic - but that will never come now. Yes the Electric APUS(EAPUs). There was also a proposal to replace the OMS/RCS with a non-toxic version that would use LOX and ethanol as the propellants instead of MMH and N204.

03-31-2008, 10:57 AM	#22
unknown Orbinaut	Who are the female commanders of Space Shuttle missions since STS-1?

03-31-2008, 11:15 AM	#23
Urwumpe Donator	Quote: Originally Posted by unknown Who are the female commanders of Space Shuttle missions since STS-1? Only Eileen Collins and Pamela Melroy.

03-31-2008, 01:43 PM	#24
unknown Orbinaut	Who are the space shuttle astronauts died as of March 31, 2008 excluding STS-51L and STS-107?

03-31-2008, 02:10 PM	#25
Urwumpe Donator	David Griggs, STS-51-D, died in 1989, killed in a crash with a historic WW2 training plane. Karl Gordon Henize, STS-51-F, died in 1993, because of heart failure while climbing Mount Everest. Robert F Overmyer, STS-5 and STS-51-B, died 1996, in a crash while testing the Cirrus VK-30 light aircraft. Charles L Veach, STS-39 and STS-52, died of cancer in 1995. David M Walker, STS-51-A, STS-30, STS-53 and STS-69, died in 2001, after a brief and sudden illness.

03-31-2008, 02:45 PM	#26
unknown Orbinaut	I have another person died, G. David Low, STS-32, STS-43, STS-57, died on March 15, 2008, due to colon cancer. Thanks Urwumpe, you are very smart.

04-01-2008, 08:55 AM	#27
unknown Orbinaut	Who are the persons of Space Shuttle before STS-1?

04-01-2008, 09:00 AM	#28
Urwumpe Donator	Quote: Originally Posted by unknown Who are the persons of Space Shuttle before STS-1? Except the many thousand engineers, I can't name? Of the Approach and Landing Tests with Enterprise: Crew 1: Fred W. Haise, Jr. C. Gordon Fullerton Crew 2: Joseph H. Engele Richard H. Truly.

04-01-2008, 09:10 AM	#29
unknown Orbinaut	Quote: Except the many thousand engineers, I can't name? Of the Approach and Landing Tests with Enterprise: Crew 1: Fred W. Haise, Jr. C. Gordon Fullerton Crew 2: Joseph H. Engele Richard H. Truly. Congratulations, Urwumpe, you are very smart.

04-01-2008, 09:55 AM	#30
myles Orbinaut	If anyone's interested, I found these really cool docs: http://www.fiddes.us/shuttle/RTLS.pdf http://www.fiddes.us/shuttle/ATOAOA.pdf Check out their site: http://www.fiddes.us/