Atlas I

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Atlas I

Launch of the maiden flight of the Atlas I, with the CRRES satellite
Function	Expendable launch system
Manufacturer	Convair
Country of origin	United States
Size
Height	43.90m (144.00 ft)
Diameter	3.05m (10 ft)
Mass	164,300kg (362,200 lb)
Stages	2.5
Associated rockets
Family	Atlas
Launch history
Status	Retired
Launch sites	LC-36B, Cape Canaveral
Total launches	11
Successes	8
Failures	3
Maiden flight	25 July 1990
Last flight	25 April 1997

The Atlas I was an American expendable launch system, used in the 1990s to launch a variety of different satellites. The "I" in "Atlas I" can cause confusion, as all previous Atlas rockets were designated using letters, ending with the Atlas H, however subsequent rockets were designated using roman numerals, starting with the Atlas II. Officially, the "I" is the roman numeral "1".

The first stage of the Atlas I was derived from Atlas G, and the second stage was a Centaur. The first stage had an improved MA-5A propulsion system, consisting of the LR-89 booster engine with dual thrust chambers and a more powerful RS-27 replacing the traditional LR-105 sustainer engine. With the new RS-27 sustainer engine, all three of the large Atlas thrust chambers produced equal thrust.^[1] Booster engine jettison occurred prior to sustainer engine cut-off for stage-and-a-half staging of the Atlas. (Used in conjunction with the Centaur, this gave the Atlas I 2.5 stages).

Launch history

See also

• Comparison of orbital launchers families

References

v t e Atlas rockets Main articles Atlas family SM-65 Atlas Rockets Prototypes MX-774 Atlas A Atlas B Atlas C Missiles Atlas D Atlas E Atlas F Launch Systems Alphabetical Atlas B Atlas D Atlas E/F Atlas G Atlas H Upper Stages Atlas-Able Atlas-Agena Atlas-Centaur Numerical Atlas I Atlas II Atlas III Atlas V Other Atlas LV-3B Atlas SLV-3 GX Launch sites Cape Canaveral LC-11 LC-12 LC-13 LC-14 (S)LC-36 SLC-41 Vandenberg LC-576 SLC-3 SLC-4 Bases Altus Dyess Fairchild Forbes Francis E. Warren Lincoln Offutt Plattsburgh Schilling Walker Components Boosters Aerojet SRM Castor 4A MA First Stages Common Core Booster Upper Stages Able Agena Altair Burner Centaur IABS MSD OIS PTS SGS Star SVS Trident Engines AJ-10 B-8048 B-8081 B-8096 LR-89 LR-105 R-4D RD-180 RL10 RS-56 Corporations Manufacturers Rocket Convair General Dynamics Lockheed Lockheed Martin Engines Aerojet NPO Energomash Pratt & Whitney Rocketdyne Thiokol LSPs International Launch Services United Launch Alliance Launches 1957-1959 1960-1969 1970-1979 1980-1989 1990-1999 2000-2009 2010-2019

v t e Expendable launch systems Current Spaceflight portal Ariane 5 Atlas V Delta II IV Dnepr-1 GSLV H-IIA H-IIB Kaituozhe-1 Kosmos-3M Long March 1D 2C 2D 2F 3A 3B 3C 4B 4C Minotaur I IV Naro-1 Paektusan Pegasus Proton-M PSLV Rokot Safir Shavit Shtil' Start-1 Strela Soyuz U FG 2 Taurus Tsyklon-2 Unha Vega VLS-1 Volna Zenit 2 2M 3SL 3SLB 3F Planned Angara Antares Athena Ic IIc Ausroc IV Epsilon GSLV III Haas Long March 5 6 7 Minotaur V Naro-2 Rocket Lab RPS (420, 550) Simorgh SLS Southern Cross Soyuz-2-1v SPARK Tsyklon-4 VLM VLS-Alfa VLS-Beta Previous Ariane 1 2 3 4 ASLV Athena I II Atlas B D E/F G H I II III LV-3B SLV-3 Able Agena Centaur Black Arrow Conestoga Delta A B C D E G J L M N 0100 1000 2000 3000 4000 5000 III Diamant Energia Europa Falcon 1‡ Feng Bao 1 H-I H-II J-I Juno I Juno II Kosmos 1 2I 3 Lambda 4S Long March 1 2A 2E 3 4A Mu 4S 3C 3H 3S 3SII V) N1 N-I N-II Pilot Proton UR-500 K R-7 Luna Molniya M Polyot Soyuz L M U2 Soyuz/Vostok Sputnik Voskhod Vostok L K 2 2M Saturn I IB V INT-21 Scout SLV Sparta Thor Able Ablestar Agena Burner Delta DSV-2U Thorad-Agena Titan II GLV IIIA IIIB IIIC IIID IIIE 34D 23G CT-3 IV Tsyklon 3 Vanguard ‡ – Falcon 1 was designed for partial reuse. However, recovery failed on the first three flights and the remaining vehicles were flown expendably.

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