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Project 921-3 is Manned Spacecraft sub-system of Project 921. The term 921-3 is often used for the Chinese space shuttle program. == History == The Chinese National Manned Space Program was given the designation of Project 921 in 1992. This broad project was divided into three phases: 921/1 to launch a manned mission by 2002 in a craft that became the Shenzhou, the Project 921/2 temporary space station by 2010, and the 921/3 permanent space station by 2020. Care must be taken not to confuse the 3 phases of Project 921 with its 7 sub-systems (921-1, 921-2 ... 921-7). Early planning of Project 921 included 6 different proposals for a manned space transportation system. Five of these proposals were of a space-earth transportation system using a delta winged orbiter. By 1990, the proposal for the Soyuz-like capsule Shenzhou had won out. Some small models for a space plane were made public, but the concept was rejected in favor of a Soyuz-like capsule which became Shenzhou. Concepts for a space shuttle now are only academic. There is no known Chinese government support beyond very basic research for a space plane. Photographs of a two-seat spaceplane simulator were published after 1980, probably belonging to a Chinese Dynasoar-like vehicle. Reports of the existence of a wind tunnel model have continued since then. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Project 921-3」の詳細全文を読む スポンサード リンク
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