Gas balloon

The first launch of a gas balloon by Jacques Charles and Les Frères Robert, 27 August 1783, at the Champ de Mars, Paris. Illustration from the late 19th century.

A gas balloon is a balloon that flies in the air because it is filled with a gas less dense than air or lighter than air (such as helium or hydrogen). It is tied to a thread to prevent it from flying up in the air. It is also sealed at the bottom to ensure that the gas doesn't escape. A gas balloon may also be called a Charlière for its inventor, the Frenchman Jacques Charles. Today, familiar gas balloons include large blimps and small rubber party balloons. Blimps have displaced zeppelins (which are not balloons) as the dominant form of airship.

History

Main article: History of ballooning

The first gas balloon made its flight in August 1783. Designed by professor Jacques Charles and Les Frères Robert, it carried no passengers or cargo. On 1 December 1783 their second hydrogen-filled balloon made a manned flight piloted by Jacques Charles and Nicolas-Louis Robert, 10 days after the first manned flight in a Montgolfier hot air balloon.[1][2][3][4]

The next project of Jacques Charles and the Robert brothers was La Caroline, an elongated steerable craft that followed Jean Baptiste Meusnier's proposals for a dirigible balloon, incorporating internal ballonnets (air cells), a rudder and a method of propulsion.[5] On September 19, 1784 the brothers and M. Collin-Hullin flew for 6 hours 40 minutes, covering 186 km from Paris to Beuvry near Béthune. This was the first flight over 100 km.[1][6]

Gas balloons remained popular throughout the age before powered flight. They could fly higher and further than hot-air balloons, but were more dangerous as they were filled with hydrogen or coal gas. Tethered gas balloons were used for observation purposes in the Napoleonic Wars (to very limited extent) and in the American Civil War, flown by Thaddeus Lowe and throughout the 19th century by hobbyists and show performers such as the Blanchards.

Gas ballooning has been popular in Europe, most notably in Germany, using hydrogen as a lifting gas. Several gas balloon clubs exist throughout the country with well organized launch sites and well defined infrastructure making flights relatively easy to do. Rough estimates show 150 active gas pilots in Europe. In stark contrast, gas ballooning in the USA might have at most 30 active pilots who typically fly only once a year at the Albuquerque Balloon Fiesta in October. This is primarily due to the prohibitively high cost of helium (~$8,000 for a single flight as of 2008), the lifting gas that most American pilots must use because of the design of their balloons. This is starting to change with the introduction of hydrogen as a lifting gas, but there are still only a handful of hydrogen-rated balloons in the country. The German gas community has been a valuable resource in helping the US pilots gain skills in flying gas balloons and working with hydrogen as a lifting gas. Many US gas pilots have been and are currently participating in training flights in Germany.

A gas balloon can also be tethered. Aerophile is the world's largest lighter-than-air carrier, flying 300,000 passengers every year through its eight operations in Walt Disney World, San Diego Zoo Safari Park, Smoky Mountains & Irvine in the USA and Paris, Disneyland Paris and Parc du Petit Prince in France.

Records

On October 24, 2014, Alan Eustace, a former Google executive, made a jump from the stratosphere, a shepericarp ballon, breaking Felix Baumgartner's 2012 world record. The launch-point for his jump was from an abandoned runway in Roswell, New Mexico, where he began his balloon-powered ascent early that morning. He reached a reported maximum altitude of 135,908 feet (41.425 km; 25.7402 mi), but the final number submitted to the World Air Sports Federation was 135,889.108 feet (41.419000 km; 25.7365735 mi).[2] The balloon used for the feat was manufactured by the Balloon Facility of the Tata Institute of Fundamental Research, Hyderabad, India. Eustace in his pressure suit hung tethered under the balloon, without the kind of capsule used by Felix Baumgartner. Eustace started his fall by using an explosive device to separate from the helium balloon.

The previous altitude record for a manned balloon flight was set at 39.045 kilometers on October 14, 2012 by Felix Baumgartner breaking a record of 34.7 kilometers on May 4, 1961 by Malcolm Ross and Victor Prather in a balloon launched from the deck of the USS Antietam in the Gulf of Mexico.[7]

The altitude record for an unmanned balloon is 53.0 kilometers. It was reached by a balloon manufactured by Fujikura Parachute with a volume of 60 thousand cubic metres, launched in May 2002 from Sanriku, Iwate, Japan. This is the greatest height ever obtained by an atmospheric vehicle.[8] Only rockets, rocket planes, and ballistic projectiles have flown higher.

In 2015, the two pilots Leonid Tiukhtyaev and Troy Bradley arrived safely in Baja California, Mexico after a journey of 11,265 km. The two men, originally from Russia and the United States of America respectively, started in Japan and flew with a helium balloon over the Pacific. In 160 hours, the balloon named "Two Eagles" arrived in Mexico, which is a new long-distance record.[9]

On other planets

The Soviet Union space probes Vega 1 and Vega 2 each dropped a helium balloon with scientific experiments into the atmosphere of Venus in 1985. The balloons first entered the atmosphere and descended to about 50 km, then inflated for level flight. Otherwise the flight was uncontrolled. Each balloon relayed wind and atmospheric conditions for 46 hours of a possible 60-hour electric battery power budget.[10]

See also

References

  1. 1 2 Federation Aeronautique Internationale, Ballooning Commission, Hall of Fame, Robert Brothers.
  2. ↑ Fiddlers Green, History of Ballooning, Jacques Charles
  3. ↑ Science and Society, Medal commemorating Charles and Robert’s balloon ascent, Paris, 1783.
  4. ↑ Eccentric France: Bradt Guide to mad, magical and marvellous France By Piers Letcher - Jacques Charles
  5. ↑ Biographical dictionary of the history of technology, Volume 39 By Lance Day, Ian McNeil. Charles, Jacques Alexandre Cesar
  6. ↑ Federal Aviation Administration - F.A.Aviation News, October 2001, Balloon Competitions and Events Around the Globe, Page 15
  7. ↑ Nicholas Piantanida, while attempting to set a new skydiving jump record, is claimed to have reached 123,800 feet (37.73 km) on February 2, 1966. Piantanida was unable to disconnect his breathing apparatus from the gondola, so the ground crew jettisoned the balloon at the flight ceiling. The flight did not set a flight record because he descended without the balloon. See excerpts from Craig Ryan's description of Piantanida's flight and harrowing descent: Tim Baggett. "QinetQ Flight". Retrieved 2009-12-29.
  8. ↑ Saito, Y; et al. (00/2006). "Development of a 2.8 µm film for scientific balloons". Advances in Space Research. ELSEVIER. 37 (11): 2026–2032. Bibcode:2006AdSpR..37.2026S. doi:10.1016/j.asr.2005.05.053. Check date values in: |date= (help)
  9. ↑ Greg Botelho. "Research on Balloons to Float Over 50km Altitude". CNN. Retrieved 2015-02-02.
  10. ↑ Preston; et al. (1986). "Determination of Venus Winds by Ground-Based Radio Tracking of the VEGA Balloons". Science. 231 (4744): 1414–1416. Bibcode:1986Sci...231.1414P. doi:10.1126/science.231.4744.1414.

External links

This article is issued from Wikipedia - version of the 12/4/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.