Author Topic: CEV to gain more Shuttle systems  (Read 3649 times)

Offline AndyMc

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CEV to gain more Shuttle systems
« on: 02/22/2006 11:48 AM »
http://www.flightglobal.com/Articles/2006/02/21/Navigation/200/204825/CEV+to+gain+more+Shuttle+systems.html

Quote:
"NASA has formally asked contractors to consider a 5m (198in)-diameter Crew Exploration Vehicle (CEV) and is requiring an interface that can link to the Space Shuttle’s Androgynous Peripheral Assembly System (APAS) for docking with International Space Station.

Previously, NASA had specified a 5.5m-diameter CEV and an interface for its Low Impact Docking System (LIDS)."...............................

".......“We are still planning to use LIDS for the lunar mission CEV, where the CEV is docked to the lunar surface module,” says Houston, Texas-based Johnson Space Center (JSC), which is leading CEV development."


Offline Jim

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RE: CEV to gain more Shuttle systems
« Reply #1 on: 02/22/2006 12:10 PM »
Old news.  They didn't want to accelerate LIDS development. Also LIDS would have required an adapter on the ISS to allow it to dock.

APAS is not really shuttle hardware, it is russian.

Offline hyper_snyper

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RE: CEV to gain more Shuttle systems
« Reply #2 on: 02/22/2006 01:16 PM »
So, APAS for Block 1 CEV and LIDS for Block 2.  Does that mean lunar bound CEVs won't be able to visit the station?  Would ISS even still exist?

Offline Jim

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RE: CEV to gain more Shuttle systems
« Reply #3 on: 02/22/2006 01:57 PM »
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hyper_snyper - 22/2/2006  8:16 AMSo, APAS for Block 1 CEV and LIDS for Block 2.  Does that mean lunar bound CEVs won't be able to visit the station?  Would ISS even still exist?

ISS and lunar departure are in different orbits

Offline abacus

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RE: CEV to gain more Shuttle systems
« Reply #4 on: 02/22/2006 11:32 PM »
Can anyone give a quick rundown of the different docking berthing mechanisms LIDS, APAS, CBM (ideally some sort of comparison chart).

Particularly the differences in hatch diameter, thinking particularly about fitting ISPRs through them.  I know the racks fit through the CBM, and don't think they fit through APAS - but how about LIDS.  Is this decision going to make it impossible to get ISPRs back and forth - or was it always going to be impossible.

Offline Jim

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RE: CEV to gain more Shuttle systems
« Reply #5 on: 02/22/2006 11:39 PM »
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abacus - 22/2/2006  6:32 PMCan anyone give a quick rundown of the different docking berthing mechanisms LIDS, APAS, CBM (ideally some sort of comparison chart).Particularly the differences in hatch diameter, thinking particularly about fitting ISPRs through them.  I know the racks fit through the CBM, and don't think they fit through APAS - but how about LIDS.  Is this decision going to make it impossible to get ISPRs back and forth - or was it always going to be impossible.

Always impossible.

Look on the COTS thread.  It has a link to the COTS procurement page and there are some briefings on docking mechanisms

lISS dockings to US Segment use Russia’s Androgynous Peripheral Attachment System (APAS)

u+X Body: PMA2

u+Z Body: PMA3

u~ 30 inch diameter

lISS module interfaces use Common Berthing Mechanisms (CBMs)

uISS robotic capture & mating only

uMPLM, HTV

u~80 inch diameter



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