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Old 08-08-2010, 04:53 PM   #76
N_Molson
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Yeah, saying that Mars by 2025 is just too "ambitious" is a little too easy... They should at least try to give a few reasons why (other than "it's just too expensive").
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Old 08-08-2010, 05:06 PM   #77
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Quote:
Originally Posted by anemazoso View Post
 The following is from the a commenter on NASA Watch named "YoungEngineer" from the SpaceX article posted on NASA Watch.
The Marshall-1 engine design is not documented by NASA at all, it would be nice if he could provide a link to any NASA report about this engine.

Even if it would, there is no copyright on gas-generator cycle engines inside NASA. Those had been invented by ze germans (The A-4 is the first documented use of a pump-fed gas generator cycle engine). MSFC did design many theoretical gas-generator cycle engines in its history, but the actual hardware was designed by Rocketdyne. It is still pretty doubtful that the Merlin-1C engine of the Falcon 9 is based on NASA design... There is no other kerolox engine in the world that has the following traits, as far as I can tell:

  • Gas-generator cycle.
  • regenerative cooling by kerosene (pretty rare).
  • kerosene from high-pressure pump tapped off for hydraulics (not very common)
  • about 600 kN vacuum thrust.
  • Tilting exhaust duct for roll control (common).

http://www.astronautix.com/engines/merlin1c.htm

And still: That the Merlin engine is no high-tech product is even desired by SpaceX. It is for cutting costs, why it uses a primitive technology that works with simpler testing.

Last edited by Urwumpe; 08-08-2010 at 05:25 PM.
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Old 08-08-2010, 09:31 PM   #78
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Florida Today: "Space program an issue politically".

Florida Today: "John Kelly: Science put on the back burner".
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Old 08-09-2010, 03:51 PM   #79
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Space News: Time to Reload in the Battle for the Frontier

An excellent commentary by Rick Tumlinson
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Old 08-09-2010, 11:39 PM   #81
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I posted some pretty good comments on that Space Review article. I post as Chad O. Had to break it down to someone who thought they knew what they were talking about. Mister smarty pants thinks he knows everything.

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Old 08-11-2010, 02:50 PM   #82
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Quote:
Originally Posted by anemazoso View Post
 I posted some pretty good comments on that Space Review article. I post as Chad O. Had to break it down to someone who thought they knew what they were talking about. Mister smarty pants thinks he knows everything.

Yeahh, you show 'em good 'n' proper!

---------- Post added at 11:33 PM ---------- Previous post was at 04:50 AM ----------

The Daily Telegraph: "NASA could land probe on asteroid hurtling towards Earth".

tampabay.com: "The next space challenge: sending astronauts to asteroids".

Parabolic Arc: "AIA Establishes Space Leadership Web Site to Support Initiatives".

---------- Post added 11th Aug 2010 at 03:50 PM ---------- Previous post was 10th Aug 2010 at 11:33 PM ----------

New Scientist: "NASA mulls sending part of space station to an asteroid". <-

SPACE.com: "Part of Space Station Could Carry Crew to an Asteroid, NASA Says".

Just a nitpick: This image appears to show an inflatable module berthed to Node 3's Zenith CBM - don't these guys know that Node 3's Zenith CBM is unusable as it's blocked off?

Aviation Week: "NASA IDs 3 Asteroids For Human Exploration".

[Audio] BBC News: "Sending astronauts to asteroids".

The Daily Telegraph: "Should we really risk ignoring an asteroid?"


msnbc Cosmic Log: "Next giant leaps for NASA tech".


SPACE.com: "Stephen Hawking Says Humanity Won't Survive Without Leaving Earth".
Why isn't Stephen Hawking running NASA - seriously?

Last edited by Orbinaut Pete; 08-11-2010 at 04:28 PM.
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Old 08-11-2010, 04:30 PM   #83
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In the Aviation Leak article about asteriods NASA says they need an IR telescope to find more asteriods and better characterise them. What about WISE? Why don't they just extend the WISE mission? Is it limited by fuel or power?

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Old 08-11-2010, 04:47 PM   #84
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Quote:
Originally Posted by anemazoso View Post
 What about WISE? Why don't they just extend the WISE mission? Is it limited by fuel or power?
A link to article posted by Orbinaut Pete on the ChatBox:
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Old 08-11-2010, 11:00 PM   #86
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Quote:
Quote:
Musk says provisional concepts for a deep space architecture were outlined as “brainstorming ideas” by Markusic. “The only thing SpaceX is intending to do for sure in the long term is to try to move toward super heavy lift,” Musk says. The key element of this, as outlined in Markusic’s presentation, is development of the Merlin 2 engine.
Wow, so in about a week, "BFR" has gone from an optimistic rumor to a power point to Musk's "Oops, we've said too much" fall-back position.
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Old 08-11-2010, 11:41 PM   #87
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Mercury News: "NASA's chief technologist seeks to develop transformative programs".
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Old 08-13-2010, 12:23 AM   #89
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Spaceflight Now: NASA says JWST cost crunch impeding new missions:
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NASA will be listening when scientists present their recommendations for the next decade of astrophysics research Friday, but some of the proposed missions could be at the mercy of soaring costs on the $5 billion successor to the Hubble Space Telescope.
...
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Old 08-13-2010, 01:33 AM   #90
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Is this another consequece of NASA picking to ambitious of a mission? I mean JWST is well beyond any other telescope in technology. Sometimes I am torn between really cool stuff like JWST and the choice of less risk but doable missions.

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