High speed at the edge of space

Jul 01, 2011

Students from the Cambridge University Spaceflight team (CUSF) have successfully tested model parachutes for the ExoMars lander. The ExoMars lander project is a European-led robotic mission to Mars. Working in conjunction with the European Space Agency, the student team tested a model of a parachute capable of landing on Mars, by re-entering the Earth’s atmosphere at 450mph.

Entry, Descent, and Landing (EDL) is perhaps the most challenging part of any Mars mission. The process requires a complex system of heat shields, parachutes, retro-rockets and airbags, all having to assemble themselves mid-air.

“Six Minutes of Terror” is how engineers describe the process of EDL as a failure in any one part would lead to almost certain mission failure.

“The Spaceflight team’s testing method has not only been successful but is an extremely cost effective way to test parachutes in a Mars-like environment,” said Iain Waugh, second year PhD student at the University of Cambridge.

This video is not supported by your browser at this time.

The testing method developed by the CUSF team costs only £1000 per launch to test one of the 1/10th scale parachutes. Previously, only full scale parachutes had been tested in this way, with costs of over a quarter of a million dollars per test. For a new planetary lander project, the CUSF method will allow lots of initial parachute design to be tested cheaply, before choosing the best designs to go forward to the more expensive full scale tests.

Iain Waugh added: “Mars has an atmosphere more than one hundred times thinner than ’s, and re-creating these high velocity, low density flows in a wind tunnel is a hugely expensive, if not impossible, task”.

Using their experience with high altitude scientific balloons and instrumentation, the Spaceflight team built a balloon-lofted vehicle packed with a test parachute. This was taken to the top of the atmosphere, where the air is a similar density to the surface of Mars.

The vehicle was then instructed by remote control to free-fall for an amount of time calculated to let it accelerate to Mach 0.8 (Mach 0.8 means 80% of the speed of sound), the parachute was then deployed.

The team monitored its inflation using a suite of instrumentation including accelerometers, gyroscopes and a high speed camera.

Slow motion video footage shows the parachutes flight during one of the low-speed system development tests. At 24km, the vehicle cuts away from the balloon, and a rope from the balloon immediately pulls the parachute out of the deployment bag. Because the vehicle is going so slowly, and the air is so thin, the parachute takes a few seconds to inflate (the video is 10x slower than real-life) and the vehicle tumbles. In the high-speed parachute test, the was deployed at Mach 0.8 (an airspeed of 250m/s) and was fully inflated in 1/20th of a second.

The team recently presented their work at the 21st AIAA Aerodynamic Decelerator Systems Conference in Dublin, where it took first place in the Best Student Paper competition.

Cambridge University Spaceflight is a student-run society formed in 2006 to experiment with low-cost .

Explore further: Amazing raw Cassini images from this week

add to favorites email to friend print save as pdf

Related Stories

No Speed Limit on Mars

Apr 07, 2008

It's a good thing there's no speed limit on Mars, because the next parachute to fly to the red planet will deploy faster than you can legally drive on a California freeway.

NASA Successfully Tests Parachute for Ares Rocket

Mar 02, 2009

(PhysOrg.com) -- NASA and industry engineers successfully completed the second drop test of a drogue parachute for the Ares I rocket. The test took place Feb. 28 at the U.S. Army's Yuma Proving Ground near Yuma, Ariz.

NASA Tests Load Limits for Ares I Rocket Main Parachute

Oct 09, 2009

(PhysOrg.com) -- NASA and industry engineers conducted a design limit load test of the Ares I rocket's main parachute Oct. 8 at the U.S. Army's Yuma Proving Ground near Yuma, Ariz. The Ares I is the first ...

NASA Conducts First Ares I Rocket Cluster Parachute Test

May 20, 2009

(PhysOrg.com) -- Unfurling in majestic patriotic colors, a successful cluster test of the Ares I rocket's three, 1-ton main parachutes was conducted May 20 by NASA and industry engineers at the U.S. Army Yuma ...

Recommended for you

Amazing raw Cassini images from this week

2 hours ago

When Saturn is at its closest to Earth, it's three-quarters of a billion miles away—or more than a billion kilometers! That makes these raw images from the ringed planet all the more remarkable.

SpaceX gets 10-year tax exemption for Texas site

2 hours ago

Cameron County commissioners have agreed to waive 10 years of county taxes as part of an agreement bringing the world's first commercial site for orbital rocket launches to the southernmost tip of Texas.

Voyager map details Neptune's strange moon Triton

4 hours ago

(Phys.org) —NASA's Voyager 2 spacecraft gave humanity its first close-up look at Neptune and its moon Triton in the summer of 1989. Like an old film, Voyager's historic footage of Triton has been "restored" ...

How the sun caused an aurora this week

5 hours ago

On the evening of Aug. 20, 2014, the International Space Station was flying past North America when it flew over the dazzling, green blue lights of an aurora. On board, astronaut Reid Wiseman captured this ...

User comments : 1

Adjust slider to filter visible comments by rank

Display comments: newest first

omatumr
4.3 / 5 (4) Jul 01, 2011
Good Luck!

The report reminds me that engineers have much more difficult jobs than most of us.

Those that engineered the Apollo flights to the Moon and the Galileo Mission to Jupiter were the real heros of the space age.

With kind regards,
Oliver K. Manuel