Dragon 2

Dragon 2
NASA Johnson Space Center · Public domain · source
Name	Dragon 2
Caption	A Crew Dragon spacecraft approaching the International Space Station.
Manufacturer	SpaceX
Designer	SpaceX
Country	United States
Applications	Crew and cargo transport to low Earth orbit
Status	In service
Built	20+
Ordered	20+
Launched	20+
First	March 2020 (uncrewed test)
Last	Ongoing
Capacity crew	Up to 7
Capacity cargo	6,000 kg (13,228 lb) pressurized and unpressurized
Power	Solar arrays
Length	8.1 m (26.7 ft)
Diameter	4 m (13 ft)
Volume	9.3 m³ (328 ft³) pressurized, 37 m³ (1,307 ft³) total
Orbits	Low Earth orbit
Lifetime	Up to 210 days docked
Spacecraft type	Reusable spacecraft
Launch vehicle	Falcon 9 Block 5

Dragon 2 is a class of reusable spacecraft developed and manufactured by the American aerospace company SpaceX. Primarily designed to transport crew and cargo to the International Space Station and other destinations in low Earth orbit, it represents a significant advancement over its predecessor, the original Dragon cargo spacecraft. The vehicle is launched atop the Falcon 9 Block 5 rocket and is capable of autonomous docking and water landings. Its development was spurred by NASA's Commercial Crew Program, aimed at restoring American crew launch capability following the retirement of the Space Shuttle.

Overview

The spacecraft was conceived as part of NASA's strategy to foster commercial spaceflight capabilities through initiatives like the Commercial Crew Development program. It exists in two primary configurations: Crew Dragon, designed for astronaut transport, and Cargo Dragon, used for resupply missions under the Commercial Resupply Services contract. This vehicle ended the United States' reliance on the Soyuz spacecraft for crew access to the International Space Station following its successful Demo-2 mission. Its operational profile includes missions for NASA, private astronauts through the Axiom Space program, and free-flying orbital flights like the Inspiration4 mission.

Development

Development began in earnest after SpaceX secured funding under NASA's Commercial Crew Integrated Capability phase in 2012. The program faced significant technical challenges, including the design of a novel launch escape system and a rigorous testing campaign that included pad abort tests at Cape Canaveral Space Force Station. A critical setback occurred in April 2019 when a Crew Dragon capsule was destroyed during a static fire test of its SuperDraco engines, leading to major design revisions. The development culminated in the successful uncrewed Demo-1 mission to the International Space Station in March 2019, paving the way for crewed flight certification.

Design and features

The vehicle features a modern, minimalist interior with touchscreen controls, contrasting with the complex instrument panels of earlier spacecraft like the Space Shuttle. Its structure incorporates a trunk section that carries unpressurized cargo and houses the vehicle's solar arrays. For crew safety, it is equipped with the SuperDraco engine system, providing a launch escape capability from the launch pad through ascent. The spacecraft docks autonomously using the International Docking System Standard, a significant upgrade from the berthing mechanism used by the first-generation Dragon. It is designed for water landings under parachutes in the Atlantic Ocean or the Gulf of Mexico.

Operational history

The first crewed test flight, Demo-2, launched astronauts Douglas Hurley and Robert Behnken to the International Space Station in May 2020, marking the first crewed orbital launch from the United States since 2011. This was followed by the first operational crew rotation mission, Crew-1, for NASA in November 2020. The vehicle has since conducted numerous crew rotation flights under the Commercial Crew Program and dedicated cargo resupply missions. It has also expanded into commercial human spaceflight, launching the all-civilian Inspiration4 orbital mission and multiple private astronaut missions to the International Space Station organized by Axiom Space.

Variants

The two main variants are optimized for distinct mission profiles. The Crew Dragon configuration includes seating for up to seven astronauts, life support systems, and crew displays, and is used for missions like Crew-7 and Axiom Mission 3. The Cargo Dragon variant, which succeeded the original Dragon cargo craft, removes crew-related systems to maximize payload capacity for delivering supplies and scientific experiments to the International Space Station. Both variants share the same core spacecraft design, avionics, and propulsion systems, ensuring commonality and reliability across the fleet.

Specifications

The spacecraft has a height of approximately 8.1 meters and a diameter of 4 meters, with a pressurized volume of 9.3 cubic meters. It can deliver up to 6,000 kilograms of cargo to the International Space Station and return 3,000 kilograms to Earth. Propulsion is provided by a set of Draco thrusters for orbital maneuvering and the more powerful SuperDraco engines for launch aborts. The vehicle's trunk provides an additional 37 cubic meters of unpressurized cargo volume and generates power via two solar array wings. Each capsule is designed for at least five flights to and from orbit, supporting SpaceX's reusability goals.

Category:SpaceX spacecraft Category:Reusable spacecraft Category:Human spaceflight