Atlas III vehicle is an improved version of the established Atlas II family of launch
vehicles. The prime modification was replacing the two Rocketdyne MA-5 first stage
and single Rocketdyne MA-5 sustainer engines with a single NPO Energomash RD-180.
Furthermore, Lockheed Martin simplified vehicle construction by drastically reducing the
total part count.
Two versions of the Atlas III
are currently available. The Atlas IIIA has a single RL-10A-4-2 engine powering the
Centaur upper stage while the Atlas IIIB has two RL-10A-4-2 engines and a stretched
Centaur upper stage to increase GTO performance to just under 10,000 lb. Both
vehicles are being marketed by International Launch Services (ILS).
||Lockheed Martin (Denver,
|Point of Contact
1660 International Drive
McLean, Virginia 22102 USA
||Eastern Test Range (28.7
deg. N Latitude)
Western Test Range (34.7 deg. N Latitude)
(ILS) Web Site
Atlas III Payload User's
Guide (4.8 Mb)