|Mission type||Test flight|
|Mission duration||7-14 days (planned)|
|Spacecraft||Starliner Spacecraft 2|
|Launch mass||13,000 kg (29,000 lb)|
|Start of mission|
|Launch date||August or September 2021 (planned)|
|Rocket||Atlas V N22 (AV-082)|
|Launch site||Cape Canaveral, SLC-41|
|Contractor||United Launch Alliance|
|End of mission|
|Landing date||September 2021 (planned)|
|Landing site||White Sands Missile Range|
|Reference system||Geocentric orbit|
|Regime||Low Earth orbit|
|Docking with ISS|
|Docking port||Harmony forward|
|Time docked||5 days (planned)|
Boeing Starliner Orbital Flight Test-2 mission patch
The Boeing Starliner Orbital Flight Test-2 (also known as Boe-OFT 2) is a planned repeat of Boeing's first Orbital Flight Test that was affected by software problems. The uncrewed mission will test the Boeing Starliner spacecraft as part of NASA's Commercial Crew Program, scheduled for launch in August or September 2021. The Starliner OFT-2 mission is planned to last seven to fourteen days, during which the Starliner spacecraft will demonstrate rendezvous and docking capabilities with the International Space Station (ISS), followed by undocking and landing in the western United States.
This is the first planned docking of Starliner after the December 2019 flight failed to rendezvous with the station due to an anomaly with the spacecraft's Mission Elapsed Time (MET) clock. On 6 April 2020, Boeing announced that they would repeat the Orbital Flight Test to prove and meet all of the test objectives. A four-month investigation of the first Orbital Flight Test resulted in Boeing proposing another uncrewed flight test of the spacecraft's systems. NASA accepted the proposal from Boeing to do another uncrewed test flight at no cost to American taxpayers, at an estimated out-of-pocket cost of US$410 million. The mission is planned to use the hardware, Starliner, and Atlas V originally planned for use on the crewed flight test.
The capsule will carry approximately 270 kg (600 lb) of supplies and test equipment to simulate future missions with astronauts and their cargo on board.
The second Atlas V N22, designated AV-082, will launch the Starliner spacecraft on its second uncrewed test flight to the International Space Station. The capsule is intended to dock with the space station, then return to Earth to land in the Western United States after an orbital shakedown cruise ahead of Boeing Crewed Flight Test.
OFT-2 is the second flight of an Atlas V without a payload fairing and with a dual-engine Centaur upper stage. The dual-engine Centaur uses two RL10s and is required for Starliner flights in order to provide a launch trajectory that allows a safe abort at any point in the mission.
Boeing modified the design of the Starliner docking system after the OFT-1 flight. A hinged re-entry cover for additional protection during the capsule's fiery descent through the atmosphere was added, like in the SpaceX design. This will be tested on the OFT-2 mission.
On 9 December 2020, NASA and Boeing announced that 29 March 2021 was the targeted launch date for the OFT-2 mission. On 16 December 2020, Boeing officials released the official mission patch for the Orbital Flight Test-2 mission. On 18 January 2021, Boeing and NASA announced that they have re-certified Starliner's spacecraft software for the OFT-2 mission. In February 2021, the launch date shifted to 25 March, then 2 April, then mid April. As of April 2021, the launch is scheduled for August or September 2021, with an exact date to be determined.