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Dream Chaser spaceplane updates (prototype images) (renamed)

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  • Dream Chaser spaceplane updates (prototype images) (renamed)

    One of no less than 8 manned orbital spacecraft in development in the US, and only 1 is by NASA - Orion. If you count suborbital too, the count is no less than 10. Most are very likely to fly as their builders are very serious aerospace companies.

    NASA page reporting on the Dryden drop test of a 15% (5 foot) Dream Chaser spaceplane model.

    They're analyzing the performance of this configuration before starting construction of the first full size Dream Chaser, which is part of the Commercial Crew Development program (CCDev).

    The Sierra Nevada/SpaceDev hybrid rocket engines have already undergone full flight profile test firings and the fuselage & engine pod tooling is done and carbon composite test articles have already been built, including cockpit mock-ups.

    Sierra Nevada's Dream Chaser is also one of two spaceplanes chosen Virgin Galactic to fly passengers to orbit and to the coming Bigelow Aerospace commercial space stations.

    Link....

    NASA Dryden supported helicopter air-drop flight tests of a 5-foot-long, 15-percent scale model of the Sierra Nevada Corporation's (SNC) Dream Chaser spacecraft design under a Space Act Agreement between the two organizations.

    The company's planned full-size Dream Chaser vehicle, based on the NASA HL-20 lifting body, is designed to carry up to seven people to the International Space Station and back. The vehicle is slated to launch vertically on an Atlas V rocket and land horizontally on conventional runways.

    Dryden provided ground and range safety support, including a T-34 chase aircraft for photo and video imagery. The Center also provided scheduling and flight test operations engineering support, along with hangar facilities and workspace.

    "Working with the SNC/CU team was a privilege. Their teamwork and dedication were phenomenal, especially through a very dynamic, tiring week of testing," said Jonathan Pickrel, NASA Dryden's flight operations engineer overseeing the testing.

    The captive carry and drop flights of the 88-pound model helped validate various aspects of the Dream Chaser vehicle's configuration and performance, such as flight stability and aerodynamic data for flight control surface deflections.

    "Working with NASA Dryden has always been a pleasure for me personally," said Dr. Merri Sanchez, Senior Director for Space Exploration Systems at SNC. "Sierra Nevada appreciates the excellent operational support, flexibility and flight test expertise from the NASA Dryden and Air Force teams during the conduct of our scale model test flights," Sanchez said. "We're leveraging the NASA HL-20 heritage design with our Dream Chaser vehicle that we are building to meet our Nation's need for a commercial crew transportation system, and it's great that our first subscale flight was at this NASA center."

    Sierra Nevada contracted with Northwest Helicopter for the Bell 206B3 Jet Ranger helicopter that carried the Dream Chaser model on a 100-ft. cable. The helicopter dropped the model from an altitude of 14,000-feet, with landing via parachute. The model was designed, built, and operated from a collaboration between SNC and the Research and Engineering Center for Unmanned Vehicles at the University of Colorado at Boulder (CU).

    NASA selected Sierra Nevada Corp. in Feb. 2010 to begin development of commercial crew transportation system to and from low earth orbit as part of NASA's Commercial Crew Development initiative and competition. It is part of an innovative effort by NASA to foster entrepreneurial activity leading to high tech growth in engineering, analysis, design and research and to promote economic growth.


    Last edited by Dr Mordrid; 17 December 2010, 18:40.
    Dr. Mordrid
    ----------------------------
    An elephant is a mouse built to government specifications.

    I carry a gun because I can't throw a rock 1,250 fps

  • #2
    NASA Deputy Administrator Lori Garver visited the Sierra Nevada factory yesterday and there was a photo-op with the Dream Chaser prototype. Like several of the CCDev projects it's built from composites including the pressure vessel. I've included the latest graphic of what she's to look like.

    For those unfamiliar with them, Sierra Nevada Corp. is a major US aerospace contractor.

    DC's hybrid rocket engines are made by Sierra Nevada's SpaceDev division, the same outfit that makes the engine for SpaceShip Two. The advantage of a SpaceDev hybrid solid is that it's throttle-able and restartable like a liquid rocket, but more easily reconditioned and doesn't require cryogenic liquid oxygen - it uses liquid nitrous oxide, aka laughing gas. The fuel is based on Hydroxyl-terminated polybutadiene (HTPB), a synthetic polymer often used in solid rocket motors including Japans Mu-V satellite launcher. The engines have already been fired many times including full mission profile simulations.

    The hybrid engines will serve multiple roles; launch escape, orbital maneuvering, retro-fire and in-atmosphere cross-range maneuvering, meaning Dream Chaser will be able to land on most sufficiently long runways within 1,600 km either side of its orbital track.

    The crew/cargo space extends the width of the pressure vessel and from the cockpit to the docking adapter at the rear between the engines. The shape is a lifting body, which is why it can fly in the atmosphere with such small winglets.

    Drop tests of Dream Chaser are likely sometime later this year.

    Launch will be atop an Atlas V, the method used for the similar length but narrower X-37B.

    Length: 9.00 m/29.50 ft
    Wingspan: 7.00 m/22.90 ft
    Volume: 16.00 m3/565.035 ft3
    Mass: 9,000 kg/19,800 lb
    Passengers: up to 6 (includes flight crew of 2)
    Cargo: undefined, but presumed to be 3,000 kg/6,614 lb







    Last edited by Dr Mordrid; 6 February 2011, 00:39.
    Dr. Mordrid
    ----------------------------
    An elephant is a mouse built to government specifications.

    I carry a gun because I can't throw a rock 1,250 fps

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    • #3
      Just got a cutaway of Dream Chaser's insides.

      7 passengers seated 2-2-2-1, 4 port & 3 starboard.

      Drop glide, approach & landing tests via Virgin Galactic's White Knight 2, SS2's mothership.


      Last edited by Dr Mordrid; 7 February 2011, 18:59.
      Dr. Mordrid
      ----------------------------
      An elephant is a mouse built to government specifications.

      I carry a gun because I can't throw a rock 1,250 fps

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