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  Space Shuttles - Space Station
  Why so many different ISS resupply spacecraft?

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Author Topic:   Why so many different ISS resupply spacecraft?
ASCAN1984
Member

Posts: 1014
From: County Down, Nothern Ireland
Registered: Feb 2002

posted 09-29-2013 03:00 PM     Click Here to See the Profile for ASCAN1984   Click Here to Email ASCAN1984     Edit/Delete Message   Reply w/Quote
Why are there so many different types cargo freighters for the International Space Station instead of just two or three?

lspooz
Member

Posts: 78
From: Greensboro NC USA
Registered: Aug 2012

posted 09-29-2013 05:00 PM     Click Here to See the Profile for lspooz   Click Here to Email lspooz     Edit/Delete Message   Reply w/Quote
I'd say it's part of the eventual trend for private corporations to follow the paths set by NASA. It's probably a good idea to have multiple options for sending cargo/crew up-n-down; the more the merrier.

Ronpur
Member

Posts: 300
From: Brandon, Fl
Registered: May 2012

posted 09-29-2013 06:08 PM     Click Here to See the Profile for Ronpur   Click Here to Email Ronpur     Edit/Delete Message   Reply w/Quote
Maybe trying not to put all your eggs in one basket. If one flight system has a failure, another can continue.

Robert Pearlman
Editor

Posts: 27808
From: Houston, TX
Registered: Nov 1999

posted 09-29-2013 06:22 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
Presently, there are five different cargo carriers:
  • Russia's Progress
  • Europe's Automated Transfer Vehicle
  • Japan's H-II Transfer Vehicle
  • SpaceX's Dragon
  • Orbital's Cygnus
Europe's ATV only has one more flight and then is being retired.

Russia's Progress services primarily the Russian segment of the space station, as well refuels the station's engines and delivers water and air. Japan's HTV services JAXA's Kibo laboratory, including its external platform, as well delivers air and water for the USOS.

SpaceX's Dragon is the only carrier that can bring large cargo back to Earth, and brings supplies to the USOS. Orbital's Cygnus also services the USOS, and can deorbit station refuse.

SkyMan1958
Member

Posts: 377
From: CA.
Registered: Jan 2011

posted 09-29-2013 08:54 PM     Click Here to See the Profile for SkyMan1958   Click Here to Email SkyMan1958     Edit/Delete Message   Reply w/Quote
What is Europe going to use to resupply after the last ATV? Is there a new platform they are planning on or are they buying space on someone else's resupply vessels?

Robert Pearlman
Editor

Posts: 27808
From: Houston, TX
Registered: Nov 1999

posted 09-29-2013 09:26 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
They will be flying supplies on the other existing spacecraft. ESA decided to devote its resources and ATV team toward developing and building the service module for Orion.

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