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astronautix.com Atlas I

Atlas Centaur 69
Atlas Centaur 69 -

Credit: Lockheed Martin. 29,712 bytes. 393 x 480 pixels.



Family: Atlas. Country: USA. Status: Hardware.

The Atlas I launch vehicle was derived from the Atlas G, and included the same basic vehicle components (Atlas booster and Centaur upper stage). Significant improvements in the guidance and control system were made with an emphasis on replacing analog flight control components with digital units interconnected with a digital data bus. The first flight of an Atlas I was on July 25, 1990. Originally, 18 Atlas I vehicles were planned for manufacture. With the award by the USAF to General Dynamics of the MLV-II vehicle development contract for the Atlas II launch vehicle, the Atlas program rescoped Atlas I production commitments to 11 vehicles and converted the remaining commitments to the Atlas II/IIA/IIAS production effort.


Specifications

Launches: 11. Failures: 3. Success Rate: 72.73% pct. First Launch Date: 25 July 1990. Last Launch Date: 25 April 1997. LEO Payload: 3,630 kg. to: 185 km Orbit. Payload: 2,255 kg. to a: Geosynchronous transfer trajectory. Liftoff Thrust: 197,750 kgf. Total Mass: 164,300 kg. Core Diameter: 3.1 m. Total Length: 43.9 m. Development Cost $: 400.00 million. in 1987 average dollars. Launch Price $: 75.00 million. in 1994 price dollars. Flyaway Unit Cost $: 70.30 million. in 1985 unit dollars. Cost comments: 1989, 61 sets of motors cost $ 650 mn.


Atlas I Chronology


1990 Jul 25 - - 19:26 GMT. LV Configuration: Atlas I s/n AC-69 / Centaur I s/n 5049. Launch Site: Cape Canaveral . Launch Complex: LC36B.
1991 Apr 18 - - 23:30 GMT. LV Configuration: Atlas I s/n AC-70. Launch Site: Cape Canaveral . Launch Complex: LC36B. FAILURE: RL-10 Centaur engine turbopump failed at T+361 seconds; destroyed by range safety.
1992 Mar 14 - - 00:00 GMT. LV Configuration: Atlas I MPF s/n AC-72 / Centaur I s/n 5052. Launch Site: Cape Canaveral . Launch Complex: LC36B.
1992 Aug 22 - - 22:40 GMT. LV Configuration: Atlas I MPF s/n AC-71 / Centaur I s/n 5051. Launch Site: Cape Canaveral . Launch Complex: LC36B. FAILURE: Destroyed by range safety. Centaur engine turbopump did not start. Identical to the 18 April 1991 failure.
1993 Mar 25 - - 21:36 GMT. LV Configuration: Atlas I s/n AC-74 / Centaur I s/n 5054. Launch Site: Cape Canaveral . Launch Complex: LC36B. FAILURE: Atlas engine failure. Loss of booster engine thrust resulted in a lower-than planned 1560 km x 1900 km orbit.
1993 Sep 3 - - 11:17 GMT. LV Configuration: Atlas I s/n AC-75 / Centaur I s/n 5055. Launch Site: Cape Canaveral . Launch Complex: LC36B.
1994 Apr 13 - - 06:04 GMT. LV Configuration: Atlas I s/n AC-73 / Centaur I s/n 5053. Launch Site: Cape Canaveral . Launch Complex: LC36B.
1994 Jun 24 - - 13:55 GMT. LV Configuration: Atlas I s/n AC-76 / Centaur I s/n 5056. Launch Site: Cape Canaveral . Launch Complex: LC36B.
1995 May 23 - - 05:52 GMT. LV Configuration: Atlas I s/n AC-77 / Centaur I s/n 5057. Launch Site: Cape Canaveral . Launch Complex: LC36B.
1996 Apr 30 - - 04:31 GMT. LV Configuration: Atlas I MPF s/n AC-78 / Centaur I s/n 5058. Launch Site: Cape Canaveral . Launch Complex: LC36B.
1997 Apr 25 - - 05:49 GMT. LV Configuration: Atlas I s/n AC-79. Launch Site: Cape Canaveral . Launch Complex: LC36B.

Bibliography:



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Last update 12 March 2001.
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