Jump to content



Photo

ESA ATV-4 'Albert Einstein' launches June 5


  • Please log in to reply
7 replies to this topic

#1 DocM

DocM

    Neowinian Senior

  • 20,226 posts
  • Joined: 31-July 10
  • Location: Michigan

Posted 14 April 2013 - 16:25

http://www.space-tra...ighter_999.html



Posted Image


#2 IsItPluggedIn

IsItPluggedIn

    Neowinian

  • 941 posts
  • Joined: 08-December 11
  • Location: Sydney, Australia
  • OS: Win 7

Posted 16 April 2013 - 00:58

Hey Doc, What is the cost like on these compared to the Russians and SpaceX?

#3 OP DocM

DocM

    Neowinian Senior

  • 20,226 posts
  • Joined: 31-July 10
  • Location: Michigan

Posted 16 April 2013 - 03:04

Hey Doc, What is the cost like on these compared to the Russians and SpaceX?


Note that all use the common berthing mechanism (CBM) except for Progress. ATV, HTV and Dragon have a 50" CBM hatch; Cygnus has a 37" CBM hatch, and Progress has a 31.5" hatch.

Cost/flight (Cygnus & Dragon are fixed price contracts)

ATV: $450-500M (one way)
HTV (Japan): likely close to ATV (one way)
Cygnus: ~$260M (one way)
Dragon: $133M (round trip w/crew development in progress)
Progress: $110-120M (one way, volume & mass limited)

#4 IsItPluggedIn

IsItPluggedIn

    Neowinian

  • 941 posts
  • Joined: 08-December 11
  • Location: Sydney, Australia
  • OS: Win 7

Posted 16 April 2013 - 04:28

Wow that is fairly expensive, is that why they are only doing one more? or is it one more for their commitment to the ISS?

#5 OP DocM

DocM

    Neowinian Senior

  • 20,226 posts
  • Joined: 31-July 10
  • Location: Michigan

Posted 16 April 2013 - 12:11

Both.

The ISS committment runs its course, and ATV is so expensive relative to the commercial operators (SpaceX and Orbital Sciences) it's not economical to extend it. Parts of ATV's propulsion bus will end up in the first 2 Orion service modules, but after that there may be a competition for later missions.

There's also changes coming for the commercial operators;

Dragon 2.0 is due to debut soon, and so will a much larger Trunk (unpressurized cargo section), about double the internal length of the current Trunk. This will be necessary for some large payloads going up in the next few flights, including new ISS commercial docking ports, the Bigelow BEAM habitat testbed, and the VASIMR plasma rocket testbed.

Orbital's Cygnus may also be enlarged IF the Antares rockets Aerojet AJ-26 engines get an expected upgrade from 338,000 lbf to 500,000 lbf each (2 of them) and a larger upper stage. As it is Antares can only loft 5,000 kg vs. Falcon 9 v1.1's 13,150 kg / 16,000 kg (depending on configuration), so it needs a boost. Might get it to ~10,000 kg.

#6 neoadorable

neoadorable

    Neowinian Senior

  • 10,466 posts
  • Joined: 01-August 05
  • Location: Flyover Country/Pacific Isle

Posted 23 April 2013 - 06:44

They shouldn't use such big names for disposable vehicles...while impressive, yes, these are too expensive.

But they have the added advantage of serving as thrusters, which I think the others can't do?

#7 OP DocM

DocM

    Neowinian Senior

  • 20,226 posts
  • Joined: 31-July 10
  • Location: Michigan

Posted 23 April 2013 - 09:43

Can't do yet. DragonRider and CST-100 may have ISS reboost capability. We don't know yet. Dream Chaser won't because of its docking orientation: it's hybrid engines will be pointing at the ISS when docked.

#8 Mohitster

Mohitster

    Neowinian

  • 1,457 posts
  • Joined: 12-October 05
  • OS: Windows 10
  • Phone: Lumia 525

Posted 23 April 2013 - 09:52

I came here because I thought this thread is about some TV Series about Albert Einstein which starts June 5. :huh: