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Risk Reduction Milestone Tests Move Commercial Dream Chaser Closer to Critical Design Review and First Flight

Dream Chaser commercial crew vehicle built by Sierra Nevada Corp docks at ISS

Dream Chaser commercial crew vehicle built by Sierra Nevada Corp docks at ISS

The winged Dream Chaser mini-shuttle under development by Sierra Nevada Corp. (SNC) has successfully completed a series of risk reduction milestone tests on key flight hardware systems thereby moving the private reusable spacecraft closer to its critical design review (CDR) and first flight under NASA’s Commercial Crew Program aimed at restoring America’s indigenous human spaceflight access to low Earth orbit and the space station.

SNC announced that it passed NASA’s Milestones 9 and 9a involving numerous Risk Reduction and Technology Readiness Level (TRL) advancement tests of critical Dream Chaser® systems under its Commercial Crew Integrated Capability (CCiCap) agreement with the agency.

Seven specific hardware systems underwent extensive testing and passed a major comprehensive review with NASA including; the Main Propulsion System, Reaction Control System, Crew Systems, Environmental Control and Life Support Systems (ECLSS), Structures, Thermal Control (TCS) and Thermal Protection Systems (TPS).

SNC former astronaut Lee Archambault prepares for Dream Chaser® Crew Systems Test.  Credit: SNC

SNC former astronaut Lee Archambault prepares for Dream Chaser® Crew Systems Test. Credit: SNC

The tests are among the milestones SNC must complete to receive continued funding from the Commercial Crew Integrated Capability initiative (CCiCAP) under the auspices of NASA’s Commercial Crew Program.

Over 3,500 tests were involved in completing the Risk Reduction and TRL advancement tests on the seven hardware systems whose purpose is to significantly retire overall program risk enable a continued maturation of the Dream Chaser’s design.

Dream Chaser is a reusable lifting-body design spaceship that will carry a mix of cargo and up to a seven crewmembers to the ISS. It will also be able to land on commercial runways anywhere in the world, according to SNC.

“By thoroughly assessing and mitigating each of the previously identified design risks, SNC is continuing to prove that Dream Chaser is a safe, robust, and reliable spacecraft,” said Mark N. Sirangelo, corporate vice president of SNC’s Space Systems, in a statement.

“These crucial validations are vital steps in our Critical Design Review and in showing that we have a very advanced and capable spacecraft. This will allow us to quickly and confidently move forward in restoring cutting-edge transportation to low-Earth orbit from the U.S.”

Following helicopter release the private Dream Chaser spaceplane starts glide to runway at Edwards Air Force Base, Ca. during first free flight landing test on Oct. 26, 2013 - in this screenshot.   Credit: Sierra Nevada Corp.

Following helicopter release the private Dream Chaser spaceplane starts glide to runway at Edwards Air Force Base, Ca. during first free flight landing test on Oct. 26, 2013 – in this screenshot. Credit: Sierra Nevada Corp.

The Dream Chaser is among a trio of US private sector manned spaceships being developed with seed money from NASA’s Commercial Crew Program in a public/private partnership to develop a next-generation crew transportation vehicle to ferry astronauts to and from the International Space Station by 2017 – a capability totally lost following the space shuttle’s forced retirement in 2011.

The SpaceX Dragon and Boeing CST-100 ‘space taxis’ are also vying for funding in the next round of contracts to be awarded by NASA around August/September 2014.

“Our partners are making great progress as they refine their systems for safe, reliable and cost-effective spaceflight,” said Kathy Lueders, manager of NASA’s Commercial Crew Program.

“It is extremely impressive to hear and see the interchange between the company and NASA engineering teams as they delve into the very details of the systems that help assure the safety of passengers.”

After completing milestones 9 and 9a, SNC has now received 92% of its total CCiCAP Phase 1 NASA award of $227.5 million.

“We are on schedule to launch our first orbital flight in November of 2016, which will mark the beginning of the restoration of U.S. crew capability to low-Earth orbit,” says Sirangelo.

Dream Chaser measures about 29 feet long with a 23 foot wide wing span and is about one third the size of NASA’s space shuttle orbiters.

It will launch atop a United Launch Alliance (ULA) Atlas V rocket from Cape Canaveral Launch Complex 41 in Florida.

Since the forced shutdown of NASA’s Space Shuttle program following its final flight in 2011, US astronauts have been 100% dependent on the Russians and their cramped but effective Soyuz capsule for rides to the station and back – at a cost exceeding $70 million per seat.

The Dream Chaser design builds on the experience gained from NASA Langley’s earlier exploratory engineering work with the HL-20 manned lifting-body vehicle.

Read my prior story detailing the wind tunnel testing milestone – here.

Stay tuned here for Ken’s continuing Sierra Nevada, Boeing, SpaceX, Orbital Sciences, commercial space, Orion, Curiosity, Mars rover, MAVEN, MOM and more planetary and human spaceflight news.

Ken Kremer

Scale models of NASA’s Commercial Crew program vehicles and launchers; Boeing CST-100, Sierra Nevada Dream Chaser, SpaceX Dragon. Credit: Ken Kremer/kenkremer.com

Scale models of NASA’s Commercial Crew program vehicles and launchers; Boeing CST-100, Sierra Nevada Dream Chaser, SpaceX Dragon. Credit: Ken Kremer/kenkremer.com

Comments on this entry are closed.

  • tonyross July 23, 2014, 3:25 PM

    This is exciting news for the future. This is the beginning (will be when it’s launched officially) of something of great proportion.

  • Jim E July 23, 2014, 5:43 PM

    Have the Boeing and SpaceX vehicles passed this milestone yet?

  • Planetwatcher July 24, 2014, 3:05 AM

    One major flaw for Dream Chaser is it will rely on the Atlas V rocket, which in turn relies on a Russian made 1st stage booster, which due to current sanctions against Russia over the Ukraine, will be increasingly difficult to come by.
    SNC might benefit by either teaming up with Scaled Composites and attach a Dream Chaser onto a Space Ship 2 rocket with White Knight 2; or by partnering with Space X, and put the Dream Chaser on top of a Falcon 9. I really feel like Dream Chaser is the best choice for a crew vessel, and using it only with Atlas V is entirely too in the box. The Space Ship 2 concept would work well with the aerodynamic design of Dream Chaser to get into orbit, or Falcon 9 is powerful enough to place it in high orbit, or possibly a one way trip to the Moon, which would require some kind of already fueled up rocket to make the return trip. A Delta 4 Heavy could get Dream Chaser to other inner Solar System destinations, provided it also has at least a Centaur rocket to bring it back. Or go really big, and attach Dream Chaser to a SLV extra heavy, and and perhaps VASMIR and go pretty much anywhere in the Solar System. The Dream Chaser really has a lot more options then anything else currently being tested.

  • Maxwell July 24, 2014, 10:11 AM

    If I recall both the CST and Dream chaser were intended to be booster agnostic, so they’ll fly on whatever can lift them. SpaceX’s dragon is unique in having its own booster system, but I doubt they’ll turn down a paying customer.

  • philw1776 July 24, 2014, 1:06 PM

    White Knight & SpaceShipTwo have nowhere near the delta V capability to launch the Dream Chaser into orbit. Not even 25%. DC needs a big launcher. As stated Atlas V with Russian engines is problematical.

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