Perlan Mission II soars to over 76,000 feet
The pressurized Perlan 2 glider set a second altitude world record crossing the Armstrong Line. (Photo: Airbus)
Airbus’ Perlan Mission II, which the company describes as the world’s first initiative to pilot an engineless aircraft to the edge of space, is in the process of making history in El Calafate, Argentina. Leveraging what the team describes as stratospheric mountain waves, rare air currents that develop in just a few places on earth for a short period of time each year, the pressurized Perlan 2 glider on August 26 set a record by soaring to a pressure altitude of more than 62,000 feet (60,669 feet GPS altitude).
This altitude record crossed the Armstrong Line, a point in the atmosphere above which an unprotected human’s blood will boil if an aircraft loses pressurization. The Perlan 2 team went higher on August 28, as Jim Payne and Miguel Iturmendi reached 65,600 feet. Then during a September 2 flight, pilots Jim Payne and Tim Gardner took the Perlan 2 glider to 76,124 feet. The Perlan 2 is designed to soar up to 90,000 feet and the team will continue to pursue higher altitude flights as weather and winds permit through the middle of September.
The 76,124-foot record-setting Perlan 2 flight surpasses even the maximum altitude in level flight of the U.S. Air Force’s U-2 Dragon Lady reconnaissance aircraft: 73,737 feet, flown by pilot Jerry Hoyt on April 17, 1989. For comparison, the U-2 is powered by an engine that generates 17,000 pounds of thrust. The Perlan 2 is engineless and weighs just 1,500 pounds, taking advantage of the mountain winds. Nestled within the Andes Mountains in Argentina, the area around El Calafate is one of those rare locations where these rising air currents can reach to 100,000 feet or more.
The first major Perlan glider altitude world record was set at this location on September 3, 2017, when Jim Payne and Morgan Sandercock pushed it to 52,221 feet GPS altitude in the same remote region of Patagonia. The 2017 record broke a previous record that was set in 2006, in the unpressurized Perlan 1, by Perlan Project founder Einar Enevoldson and Steve Fossett.
“This is a tremendous moment for all the volunteers and sponsors of Airbus Perlan Mission II who have been so dedicated to making our non-profit aerospace initiative a reality,” said Ed Warnock, CEA of The Perlan Project.
Another first-of-its kind achievement this year for the Perlan Project, explains Airbus, was the use of a special high-altitude tow plane rather than a conventional glider tow plane. During last week’s 62,000-foot flight, Perlan 2 was towed to the base of the stratosphere by a Grob Egrett G520 turboprop, a high-altitude reconnaissance plane that was modified for the task earlier this summer. Operated by AV Experts, LLC, and flown by chief pilot Arne Vasenden, the Egrett released Perlan 2 at around 42,000 feet, the approximate service ceiling of an Airbus A380.
Built in Oregon and home-based in Minden, Nevada, the Perlan 2 glider incorporates a number of innovations to enable its mission, including:
• A carbon-fiber capsule with a unique high-efficiency, passive cabin pressurization system that eliminates the need for heavy, power-hungry compressors;
• A closed-loop rebreather system, in which the only oxygen used is what the crew metabolizes. Airbus describes it as is the lightest and most efficient system for a sealed cabin, and its design has applications for other high-altitude aircraft;
• An onboard wave visualization system that graphically displays areas of rising and sinking air in cockpits. For commercial flights, following lines of rising air would allow faster climbs and save fuel, while also helping aircraft avoid dangerous phenomena such as wind shear and severe downdrafts.
Unlike powered research aircraft, Perlan 2 does not affect the temperature or chemistry of the air around it, which the company explains as making it an ideal platform to study the atmosphere. The experiments carried aloft in its instrument bay are yielding new discoveries related to high-altitude flight, weather and climate change.
This season, Perlan 2 is flying with experiments developed by The Perlan Project’s science and research committee, as well as projects created in collaboration with organizations and schools in the U.S. and Argentina. Perlan 2 research projects currently include:
• An experiment measuring radiation effects at high altitudes, designed by students from Cazenovia Central School & Ashford School in Connecticut. This project is in coordination with Teachers in Space, Inc., a nonprofit educational organization that stimulates student interest in science, technology, engineering and mathematics;
• A flight data recorder, developed by Argentina’s Instituto de Investigaciones Científicas y Técnicas para la Defensa (CITEDEF);
• A second flight data recorder, designed by students at Argentina’s La Universidad Tecnológica Nacional (UTN);
• A space weather (radiation) instrument;
• An experiment titled “Marshmallows in Space,” developed by the Oregon Museum of Science & Discovery to teach the scientific process to preschoolers; and
• Two new environmental sensors, developed by The Perlan Project.
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