Other Free Encyclopedias » Brief Biographies » Biographies: Katie Burke (1953–) Biography - Personal to Galeazzo Ciano (1903–1944) Biography » Franklin R. Chang-Díaz: 1950—: Astronaut, Physicist Biography - Advice From Von Braun, Chosen By Nasa, Used Space Technology For Improving Drugs, Travel To Mars

Franklin R. Chang-Díaz: 1950—: Astronaut, Physicist - Travel To Mars

vasimr space times propulsion


Chang-Díaz's research on plasma rocket engines could lead to technology that would significantly reduce the amount of time required to travel from Earth to Mars. With current technology, based on chemical propulsion, rockets can achieve a speed of only 10,000 miles per hour; this would make a trip to Mars take at least ten months each way. Higher rocket speeds could be reached if the spacecraft's propellant were super-heated—but this, Chang-Díaz has pointed out, would cause the rocket to melt. But the variable specific impulse magnetic resonance (VASIMR) propulsion system, on which Chang-Díaz has worked for more than 20 years, avoids this problem by using magnetic fields to contain and guide the propellant gases. Chang-Díaz described the process, in a New York Times article, as "like a microwave oven."

With the VASIMR engine, rockets could achieve speeds of 650,000 miles per hour. At the same time, Chang-Díaz explained, VASIMR's superior fuel efficiency would significantly reduce the weight of the space-craft—and therefore the high cost of space missions. He has calculated that a VASIMR—powered mission to Mars, including one spacecraft for astronauts and another for supplies, would weigh only about 400 tons half the weight of an earlier design for a Mars mission. VASIMR technology could cut the time of a mission from Earth to Mars from ten months to only 93 days. Though VASIMR is not the only propulsion system being considered by NASA, Chang-Díaz said in the New York Times that "I think it's the technology that's going to take us to Mars." The VASIMR propulsion system could be operational for a Mars mission by 2018.


Active in promoting support for space programs, especially in Latin America, Chang-Díaz has also participated in community service work. He spent two and a half years as a house manager in an experimental residence for chronic mental patients who were being released from institutionalized care. He has also worked as an instructor and advisor for a Massachusetts rehabilitation program for Hispanic drug abusers. Chang-Díaz travels widely in the United States, Mexico, and Latin America, speaking on the importance of sharing space-age technologies with developing nations.


Sources

Periodicals


Boston Globe, January 3, 1986, p. 9.

Los Angeles Times, July 3, 1997, pp. B1, 5.

MIT Tech Talk, February 3, 1999.

New York Times, June 20, 2000, p. D5; November 28, 2000, p. D8.


On-line


Hispanic Engineer National Achievement Awards Conference, http://www.henaac.org

National Aeronautics and Space Administration, astronaut biography, http://www.jsc.nasa.gov/Bios/htmlbios/chang.htm

National Aeronautics and Space Administration, STS-111 information, http://www.spaceflight.nasa.gov/shuttle/

—Elizabeth Shostak

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about 6 years ago

A TRIP TO MARS IS AN ILLUSION OF SOME SCIENTISTS. WHEN FRANKLIN CHANG SPOKE OF 39 DAYSHE SHOULD HAVE CLARIFY THAT ONLY IF MARS WERE QUIET AT THE SAME DISTANCE, BUT THIS DISTANCE VARIES TOO MUCH. IN ADDITION HOW TO RETUNR WITHOUT ANOTHER ROCKET AND WITHOUT LOGÍSITCS LIKE (NASA), NOR PLATFORMS. IN ADDITION MARS IS A TOTALLY HOSTILE PLANET TO ALL TYPE OF LIFE, WITHOUT BREATHABLE ATMOSPHERE, WITH GREAT STORMS OF COSMIC DUST AND ABSOLUTELY TOXIC GASES, AMONG THEM 95% OF DIOXIDE OF CARBON, 0,07% OF CARBON MONOXIDE, AND, ONLY A 0,15% OF OXYGEN, OXYGEN THAT IN OUR PLANET IS OF 20% IN THE AIR WHICH WE BREATHED. TO NEGLECT TO THE EARTH TO WALK IN TRIVIALITIES AS THE TRIP TO MARS. TO TRAVEL TO THE REST OF COSMOS IS STILL MORE IMPOSSIBLE, SO,… LET US TAKE CARE OF OUR UNIQUE AND MATCHLESS PLANET, WITH BLUE SKY, SEA, RIVERS, MOUNTAINS, FORESTS, AND WE: MEN AND WOMEN FIGHTING TO TREAT IT WELL FOR BETTER DAYS, BEST WE CAN DO IS NOT THINKING IN EXPENSIVE AND UTOPIAN PROJECTS IT IS HOUR TO PUT TO US MORE SERIOUS AND REALISTIC. THIS, OUR PLANET AND OUR LIFE, IS NOT A CHILDREN´S GAME.