zanl188
Posts: 3469
Joined: Sat Oct 21, 2006 9:05 pm

Atlas V Launch Falls Short

Sat Jun 16, 2007 11:10 pm

An Atlas V launched from the Cape yesterday put its payloads in improper orbits. Apparently all went well until the second Centaur firing fell short of its performance targets.

http://www.spaceref.com/news/viewnews.html?id=1222
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DfwRevolution
Posts: 8727
Joined: Sat Jan 09, 2010 7:31 pm

RE: Atlas V Launch Falls Short

Sun Jun 17, 2007 10:36 am

Not exactly good news for the Atlas V crowd who were claiming superior reliability than the Delta IV...
 
da man
Posts: 836
Joined: Fri Sep 14, 2001 8:27 am

RE: Atlas V Launch Falls Short

Sun Jun 17, 2007 11:30 am

Quoting DfwRevolution (Reply 1):
Not exactly good news for the Atlas V crowd who were claiming superior reliability than the Delta IV

Well, this is the first mishap with the Atlas V. The previous 9 launches have been successes.

The Delta IV has had 7 launches with one total failure.
(The launch Atlas V launch in question is being classified as a partial success.)

The Atlas V so far has a 90% success ratio.
The Delta IV so far has an 85.7% success ratio.

All figures according to Wikipedia.
War Eagle!
 
DfwRevolution
Posts: 8727
Joined: Sat Jan 09, 2010 7:31 pm

RE: Atlas V Launch Falls Short

Sun Jun 17, 2007 2:32 pm

Quoting Da man (Reply 2):
The Delta IV has had 7 launches with one total failure.

The Delta IV has no flights that could be described as "total failures." The closest to a failure would be the test flight of the Delta IV Heavy in which the DemoSat payload failed to reach its planned orbit. That is exactly what has occurred with this Atlas V flight, yet you only describe it as a partial success. And less we forget:

A. The Delta IV Heavy failure occurred while testing a configuration that has never been flown with the Atlas V
B. The Delta IV Heavy failure did not lead to the (potential) loss of any critical hardware
C. Many in the media and industry called the Delta IV Heavy test flight a "partial success" as well.
 
da man
Posts: 836
Joined: Fri Sep 14, 2001 8:27 am

RE: Atlas V Launch Falls Short

Sun Jun 17, 2007 2:42 pm

Quoting DfwRevolution (Reply 3):

Thank you for the correction, I was also reviewing the Ariane 5 and mixed up the failures and partial successes.
You are absolutely correct

Quoting DfwRevolution (Reply 3):
A. The Delta IV Heavy failure occurred while testing a configuration that has never been flown with the Atlas V

True, but the config will eventually fly on the Heavy versions of the Atlas V
War Eagle!

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