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Headshot of Jason Davis

Dream Chaser mini-shuttle prepares for free flight tests

Posted by Jason Davis

2013/08/15 03:42 CDT

Topics: human spaceflight, International Space Station, private spaceflight, future technology

The last time a reusable space plane underwent an approach and landing test at Southern California's Edwards Air Force Base was October 26, 1977. On that day, Space Shuttle Enterprise was released from its carrier aircraft—sans tail cone—and glided to a safe landing on Runway 04.

Now, a somewhat familiar-looking black-and-white spacecraft is again roaming the runways at NASA's Dryden Flight Research Center. Sierra Nevada Corporation's Dream Chaser recently completed a series of range and taxi tow tests, in which the mini-shuttle was pulled by truck at speeds of 10, 20, 40, and finally, 60 mph, shaking down the vehicle's braking and landing systems. The tow tests pave the way for free flight approach and landing tests that could begin as early as this fall.

The Dream Chaser

NASA / Ken Ulbrich

The Dream Chaser
Sierra Nevada Corporation's Dream Chaser spacecraft is readied for a tow test at NASA's Dryden Flight Research Center on Aug. 2, 2013. During the test, a truck towed the Dream Chaser to a speed of 60 mph before releasing it, allowing engineers to test the vehicle's braking and landing systems.

NASA

Dream Chaser tow testing
This NASA video shows the Dream Chaser arriving at Dryden Flight Research Center and participating in tow testing.

You may have noticed something unique about the Dream Chaser's nose landing gear: There’s no wheel and tire. The vehicle uses a skid strip, a flat, ski-like surface that extends from the spacecraft’s belly. Skid strips aren’t exactly new technology. Cape Canaveral Air Force Station has a runway nicknamed the "skid strip" in honor of a winged, pre-ICBM nuclear deterrent called the Snark, which (attempted) skid landings in the late 50s and early 60s.

But why use a skid instead of a wheel and tire? Sierra Nevada hasn't been terribly forthcoming with details. Last year, NASA announced the company had successfully tested the spacecraft's "nose landing gear." However, the article made no mention of the skid system. NASASpaceflight.com reported there were concerns about the Dream Chaser’s tires following exposure to a space environment, which may have prompted the switch. The article notes that if the spacecraft has to land on a bum tire, it's preferable for that tire to be part of the rear landing gear. NASASpaceflight.com pressed Sierra Nevada for more details, but were told no further data or images from the test would be released.

SNC is one of three private companies—the others being Boeing and SpaceX—slated to provide crew transportation to the International Space Station under NASA's Commercial Crew program. The Dream Chaser launches atop an Atlas V rocket. The Atlas is not currently human-rated, but NASA and United Launch Alliance are working together under an unfunded partnership to change that (the rocket is also the launch vehicle for Boeing’s CST-100 crew capsule). After hitching a ride to space, the Dream Chaser is powered by two hybrid rocket engines based on the same technology used by SpaceShipOne and SpaceShipTwo.

Dream Chaser docked at International Space Station

Sierra Nevada Corporation

Dream Chaser docked at International Space Station
In this concept art, the Dream Chaser spacecraft is seen docked to the International Space Station. The privately-owned vehicle can transport up to seven crew members to the orbiting outpost.

The Dream Chaser has a fascinating history. Its design is based on the HL-20, a 1990s NASA mini-shuttle concept that was never built. In turn, the HL-20's heritage dates back to early lifting body research and Cold War spying.

Having completed two operational cargo runs to the ISS, SpaceX would appear to have an taken an early lead in the private space race. However, the Dream Chaser's Space Shuttle-like appearance is sure to turn heads when it finally takes flight. Cheryl McPhillips, the NASA liaison assigned to Sierra Nevada, said, "I look forward to seeing this bird land on the old shuttle runway this fall."

 

Or read more blog entries about: human spaceflight, International Space Station, private spaceflight, future technology

Comments:

Mike W: 08/16/2013 12:36 CDT

I think you have a typo in this article. "Dream Chaser" should be spelled "Farscape One" :) http://th01.deviantart.net/fs50/PRE/f/2009/288/f/e/Farscape_1_1_by_Animaniacarts.jpg

Bob Ware: 08/16/2013 02:07 CDT

2 questions off of the top of my head: Which old shuttle runway are they referring to? DFRC or KSC? If it's KSC the concrete runway is not exactly ideal for a skid gear landing. They really need to fix that tire problem.

Bob Ware: 08/23/2013 08:41 CDT

...and the answer is DFRC at this point for the landing site.

Emily M: 12/01/2013 02:56 CST

Hi there! I'm a college student from St. Louis, MO. I'm writing a research paper discussing NASA's funding and the U.S.'s future in human space exploration. So far, I've gathered information regarding the closing of the Shuttle Program and NASA's planning for the future through 2012 but up until I found this site, I had not read much about their current standing. The situation was looking pretty bleak after the Shuttle Program closed and after President Obama cancelled the Constellation Program. It's great to see that NASA has still found a way to continue U.S.-based human spaceflight through commercial companies. However, my question is will it be more beneficial to the country for NASA to maintain control over human space exploration or for commercial companies to take over and create a space economy? From what I've read here, it looks like NASA still has a great influence on these developments that commercial companies are achieving. Do you think a commercial space economy would ever be possible?

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