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Is NASA developing a new generation os human transportation ship, or are they doing any kind of research and/or development which final aim is to invent a new space ship model?

If I know well, NASA wants to change the Space Shuttle model into something else, but I'm not sure if are they even working on creating one.

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up vote 8 down vote accepted

NASA is funding Orion for their program of deep space exploration. enter image description here

A 4 person capsule designed for deep space missions (Beyond Low Earth Orbit) service module fluctuates between NASA and ESA (based on ATV). It will launch on the Space Launch System, a vaguely shuttle derived booster, that is set to fly once every 2 to 4 years, so is likely to not succeed.

enter image description here

NASA is also funding the CCiCAP program, in which private companies design spaceships on which NASA will purchase seats (as opposed to Orion, which will be owned and operated by NASA). These ships are mostly designed to service destinations in LEO (Low Earth Orbit) like the International Space Station and potential future commercial space stations, such as the ones being developed by Bigelow Aerospace.

CCiCAP is currently funding 3 companies: SpaceX, Sierra Nevada Corporation (SNC), and Boeing.

SpaceX with DragonRider (maybe to be called Dragon 2.0) is probably the leading contender, since the launcher (Falcon 9) and the basic capsule design (Dragon) have flown a number of times now. (F-9 8 times, Dragon 4 times)

enter image description here

This is a vertical take off capsule, on a potentially reusable booster (Falcon 9-R) that will land propulsively on land. It will carry a crew of 7.

Sierra Nevada Corp (SNC) with Dream Chaser is the only horizontal lander in the bunch launching atop an Atlas 5 402 booster. (It is worth noting, the 402 variant has never flown. The 4 means 4 meter fairing, 0 strap on boosters, and 2 RL-10 engines in the second stage. The 401 variant has flown more than 20 times, but never the 402 variant). They have test dropped a full scale model, which executed the landing approach perfectly, but one of the landing gear did not deploy, so on landing on a runway it flipped over. The landing gear were not the ones they intend to use for real, it was a temporary stand in just for this test.

enter image description here

Boeing is developing the CST-100, a 7 person capsule design, launching on a Atlas 5 401 variant, and landing using parachutes and air bags on land. They have tested air dropping a capsule to land by parachute and air bags.

enter image description here

Blue Origin was funded during an earlier portion of CCiCAP (known as CCDev), proposing a "biconic" capsule which would land vertically, but would generate some extra lift on descent, providing a smoother ride for the occupants. Initially they planned on an Atlas V as well, but they intend to build their own reusable launcher at some point. Their vehicle is shrouded in mystery with very few reliable details available at this time. They also did not submit a proposal for CCiCAP, so they are effectively out of the running for the near to medium term.

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