Author Topic: Shuttle Questions Q & A (Part 3)  (Read 307953 times)

Offline joncz

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Re: Shuttle Questions Q & A (Part 3)
« Reply #1220 on: 10/31/2007 02:46 PM »
Is there an OBSS for each shuttle or are there only one or two booms that are rotated among the shuttles?  Asking relative to the possibility of using the OBSS for the array repair - if they damage/destroy the sensors on this OBSS, what's the downstream impact?


Offline rdale

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Re: Shuttle Questions Q & A (Part 3)
« Reply #1221 on: 10/31/2007 02:53 PM »
There are backup instruments, more on L2 now (I'm sure Chris has an article coming.)

Offline nathan.moeller

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RE: Shuttle Questions Q & A (Part 3)
« Reply #1222 on: 10/31/2007 04:26 PM »
Quote
Jim - 29/10/2007  6:22 AM

Quote
usn_skwerl - 29/10/2007  7:10 AM

Does anyone know where I could find a hi-res image of this, please?

That is a fake picture so I doubt there is a hi-res of it

It's a mosaic that was made to be a poster.  It's available at www.thespacestore.com.  Feel free to scan it for us when you get it ;)

EDIT: Here - http://www.thespacestore.com/amspshfl.html
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Online The-Hammer

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RE: Shuttle Questions Q & A (Part 3)
« Reply #1223 on: 11/02/2007 02:03 PM »
How much effort (for future flights) would it take to modify the OBSS middle grapple position (where the SSRMS grapples the OBSS) to allow the SSRMS to provide power to the OBSS heaters?

Seems like it would be a useful ability to have, especially if they have problems with the S6 SAW deploy (however unlikely that may be).

Also, if the grapple could additionally be modified to allow data connections that would help alleviate the concerns about the late inspection on the mission where they have to leave the OBSS at the station (123?).

Also, there has been discussion on the forum about the possibility of leaving "a" boom (not necessarily the OBSS) at the station following STS-133. If the OBSS could be modified  to receive power and data from the SSRMS, STS-133 could just leave the OBSS at the station and use the SSRMS with OBSS for the late inspection.
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Offline DaveS

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RE: Shuttle Questions Q & A (Part 3)
« Reply #1224 on: 11/02/2007 02:13 PM »
Quote
The-Hammer - 2/11/2007  4:03 PM

How much effort (for future flights) would it take to modify the OBSS middle grapple position (where the SSRMS grapples the OBSS) to allow the SSRMS to provide power to the OBSS heaters?
.
Lots. The electrical connectors on the SSRMS LEEs are arranged differently than on the SRMS EEn.

The SSRMS LEE is configured with the electrical and data connectors in a X type configuration where the end effector grapple snare is located in a cylinder in the middle of the X.

The SRMS electrical connector is located in the six o'clock position at the bottom of the the end effector.

So it would have to be modified with a dedicated Power and Data Grapple Fixture(PDGF) which is much larger than a standard grapple fixture.

Attached is two images, the first one is of a ordinary grapple fixture. The second one is of a PDGF.
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Offline Andy_Small

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RE: Shuttle Questions Q & A (Part 3)
« Reply #1225 on: 11/02/2007 11:03 PM »
what is the velocity of the vehicle at SRB separation?

Offline Lee Jay

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RE: Shuttle Questions Q & A (Part 3)
« Reply #1226 on: 11/02/2007 11:24 PM »
Quote
Andy_Small - 2/11/2007  6:03 PM

what is the velocity of the vehicle at SRB separation?

Usually a little better than Mach 4, or about 3000mph.

Offline psloss

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Re: Shuttle Questions Q & A (Part 3)
« Reply #1227 on: 11/02/2007 11:50 PM »
FYI, Bill Harwood publishes this data for every shuttle mission:
http://www.cbsnews.com/network/news/space/120/120ascentdata.html

Offline Skinny

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RE: Shuttle Questions Q & A (Part 3)
« Reply #1228 on: 11/03/2007 12:59 AM »

And let us continue in the next episode of this Q&A :

 Part 4


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