What are the structural characteristics of American Gemini spacecraft?

Gemini spacecraft is similar in shape to Mercury spacecraft, basically conical-bell-shaped, with a total length of 5.7 meters, a maximum diameter of 3 meters at the bottom and a weight of about 3.0 ~ 3.9 tons.

Return capsule. It is taken by two astronauts, with a total length of 3.4 meters, a maximum diameter of 2.3 meters and an astronaut activity space of 2.55 meters 3. The total weight is 1982 kg, including the weight of two astronauts 144 kg and the weight of the seat bracket is 426 kg. Pure oxygen is used in the cabin with a pressure of 340 MPa.

Equipment cabin. Length 1.4m, maximum diameter 3.05m, weight 1278kg, in which the weight of the environmental control life support system 1 17kg.

The spacecraft structure adopts the principle of cabin layout, and all components of each subsystem are placed in a compact cabin, which is convenient for inspection and assembly and replacement in case of failure. Gemini spacecraft from No.5 to 12 all use fuel cells, which are simple and compact in structure, resistant to impact and vibration, small in size, light in weight and high in specific power. The spacecraft also uses the ejection seat as an emergency life-saving means, which can provide astronauts with a life-saving means not only in the launch stage, but also in the landing stage.