Spinning Robotic Landers Make Space Exploration a Hop and Skip (SPACE.com)

Jeremy Hsu, InnovationNewsDaily Senior Writer
Space.com Jeremy Hsu, Innovationnewsdaily Senior Writer
space.com – Sat Jun 25, 8:14 am ET

LAUREL, Md. — A former robot contender for the Google Lunar X Prize may find resurrection as a robotic lander for surface missions to planets and moons across the solar system. Its secret rests in a spinning midsection based on proven satellite technology that ensures almost unshakable stability.

The spinning lander could land and hop across alien surfaces on springy legs that have the flexibility "between a golf club shaft and a fishing pole," said Rex Ridenoure, president and CEO of Ecliptic Enterprises in Pasadena, Calif. His company holds pending patents on the space technology that originated with Harold Rosen, a satellite pioneer.

One version of the lander intended for an asteroid mission might have extra detachable harpoon legs to temporarily anchor itself to the rock, Ridenoure told a crowd of scientists and engineers at the 9th IAA Low-Cost Planetary Missions Conference here. Another version aimed at Europa might add a drill for tapping the Jupiter moon's icy secrets. [Best and Worst Mars Landings]

Whatever the destination, the spinning design ensures a relatively easy landing compared to most space missions.

"The neat thing is that the thing will not tip over," Ridenoure said. "The thing will just hop and bounce and skitter until it comes to a stop."

That vision began with Rosen, a former engineer for the Hughes Aircraft Company who first harnessed spinning back in 1965 as a way to stabilize satellites holding the same geostationary orbit above the Earth. His dual-spin design kept the main satellite body spinning while an instrument platform remained motionless.

Space explorers such as Galileo have also used the dual-spin concept. But even after Rosen retired from Hughes Space & Communications (now Boeing Satellite Systems), he harbored unfulfilled hopes of using spinning for stabilized robotic landings.

Rosen got his chance when the Google Lunar X Prize first debuted in 2007. The lunar landing competition offers a $20 million grand prize for landing a robot on a lunar surface, having it travel at least 1,650 feet (500 meters) and send data and images back to Earth.

The Southern California Selene Group formed by Rosen to compete in the Google Lunar X Prize included Ridenoure at Ecliptic Enterprises. The team designed a three-legged robotic contender, but eventually withdrew from the competition in 2008 after expressing philosophical differences with the X Prize Foundation's vision for commercializing space and human exploration.

But the spinning lander concept has not died.

Rosen handed off the technology to Ecliptic, and the company is now fielding queries from anyone interested in a possible low-cost lander mission. For comparison, the Southern California Selene Group had planned on a total mission cost of $20 million to $30 million while competing for the X Prize.

The spinning lander is small enough to reach many solar system targets by riding aboard a private Falcon 9 rocket developed by the commercial spaceflight firm SpaceX, Ridenoure said. And there is always the opportunity to pull up stakes and move if the original landing site doesn't work out.

"Once you get down on the surface, if you rotate the payload around and don't like the site, you can hop to another one," Ridenoure said.

You can follow InnovationNewsDailysenior writer Jeremy Hsu on Twitter @ScienceHsu. Follow InnovationNewsDaily on Twitter @News_Innovation, or on Facebook.

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Europe Aims to Launch Robotic Mini-Shuttle By 2020 (SPACE.com)

Rob Coppinger, SPACE.com Contributor
Space.com Rob Coppinger, Space.com Contributor
space.com – Mon Jun 13, 8:14 pm ET

A European-built robot space plane could be flying in orbit before the end of the decade if the project's planning discussions, which kick off this month,  come to fruition.

The spacecraft would be Europe's civilian equivalent to the U.S. Air Force's unmanned X-37B Orbital Test Vehicle, a robotic miniature space shuttle that has flown on two missions since 2010.

This European robot space plane would be an evolved version of European Space Agency’s Intermediate Experimental Vehicle (IXV), which is expected to make its first flight in 2013.

Planning for the space plane starts this month because the final industrial phase for the IXV  is also under way, with the awarding of manufacturing and assembly contracts at the Paris air show, ESA’s IXV project manager Giorgio Tumino said.

Tumino's team finished the IXV’s critical design in May, setting the stage for the spacecraft's construction. [Video: Europe's IXV Space Plane]

"We have a very committed industrial team," Tumino told SPACE.com.

Europe's robot space plane

Like the IXV prototype, ESA's future robot space plane would fly on an unmanned Vega rocket from the Guiana Space Center in Kourou, French Guiana. The spacecraft could be used to monitor the Earth or service satellites, then re-enter the atmosphere and land like an aircraft.

For the full-size spacecraft to fly in low-Earth orbit before 2020, its development, testing and production must be approved by 2015 by ESA’s member states. This decision would follow three years of conceptual and preliminary vehicle design studies that could start next year.

The hope is that the planning that starts this month will lead to ESA member states approving the design studies in 2012, project officials said.

ESA's Vega rocket is slated to make its maiden launch later this year. A successful test flight would move the IXV prototype, a key milestone in the space plane project, closer to its own 2013 test.

Meet the IXV space plane

The IXV space plane weighs about 3,970 pounds (1,800 kilograms) and is 14.4 feet long (4.4 meters) and 7.2 feet wide (2.2 meters). It is described as a lifting body because its shape produces lift without the need for wings.

The vehicle has four thrusters and two body flaps at the rear to provide flight control. For comparison, NASA’s space shuttle vehicle also has a body flap. The flaps are used for pitch control, which determines whether the nose of the shuttle goes up or down, during re-entry.

The U.S. Air Force's X-37B robot space plane is larger than Europe's IXV. The X-37B vehicles, the second of which is in orbit today, weigh 11,000 pounds (nearly 5,000 kg) each and are about 29 feet long (nearly 9 m) and have a wingspan of 14 feet (4.2 m).

Like Europe's IXV, the Boeing-built X-37B is used to test reusable spacecraft technologies but it is also used for classified operations, with many experts suggesting it can perform orbital reconnaissance functions. [Photos: USAF Launches X-37B Space Plane]

The first X-37B launched in April 2010 and that vehicle, OTV-1, made an autonomous landing nine months later in California in December. The second X-37B, OTV-2, was launched in early March 2011 to begin a similar 270-day mission.

Europe's big test launch

When the IXV launches on its first test flight, it is expected to soar into orbit from French Guiana and then splash down in the Pacific Ocean 21/2 hours later using parachutes. The robotic spacecraft is expected to re-enter the atmosphere at Mach 20, more than 20 times the speed of sound.

By performing maneuvers in the atmosphere during descent, the spacecraft should be able to slow itself considerably, to about Mach 2. Parachutes should then be open to slow the craft even further for a water landing.

The IXV will carry 600 sensors to record the effects of its atmospheric re-entry and descent on its heat shield and other systems, ESA officials have said. 

ESA began the IXV project in 2005 with plans for a 2010 test launch, but by 2009 delays had set the flight back to 2012, and it later slipped to 2013. In 2006, ESA officials said that the IXV’s preliminary and detailed design and development work, manufacture, assembly and testing would cost about 100 million euros (about $144 million).

Originally managed by a new European joint venture company called NGL Prime, the project was moved to Thales Alenia Space when NGL Prime closed in 2008. This change in  management also led to a redesign of IXV in 2009.

Tumino declined to give a figure for the latest total cost of IXV due to these industrial changes as final negotiations with industry were under way.

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