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Topic: Altitude chamber

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	Hypobaric Altitude Chamber
		This was one of the officers assigned to the chamber unit and trained specifically in the operation of the chamber and the effects of flight.
		Chamber flights were never started until the PTO was in the chamber room and ready to go, and they requested permission from flight doc to begin the flight.
		The door separating the two chambers was closed, the two chamber operators manipulated the atmospheric pressures, and the flier was on their way to a simulated altitude of over 60,000 ft. while the observers on the other side of the glass stayed at between 15,000 and 20,000.
	www.wvi.com /~sr71webmaster/Alt_Chamber.htm (7069 words)

	Altitude Training for Sea-Level Competition
		Living and training at altitude is less effective than living at altitude and training near sea level, because the lack of oxygen at altitude results in detraining through reduction in intensity of training.
		The effect occurs in mountaineers at high altitudes (MacDougall et al., 1991), but it's not clear whether it's a risk for athletes living at altitudes of about 3000 m and training low, or whether it could be detected by suitable measurement of muscle mass.
		Altitude chambers, nitrogen houses and nitrogen tents would be dangerous if the simulated altitude was high enough and long enough to raise the thickness of blood to an unsafe level.
	www.sportsci.org /traintech/altitude/wgh.html (6810 words)

	CYCLING PERFORMANCE TIPS - training at altitude
		Although the primary cause of these symptoms is related to the reduced oxygen content and humidity of the ambient air at high altitudes, the physiologic pathway relating hypoxemia to AMS and its sequelae remains unclear.
		The capillary concentration in skeletal muscle is increased in animals living at altitude compared to those at sea level, and muscle biopsies in acclimatized men have demonstrated an increase in myoglobin, mitochondria, and metabolic enzymes necessary for aerobic energy transfer.
		An altitude of 2500 to 2800 meters maintains a balance between stimulating erythropoietin and minimizing the effects of acute mountain sickness that occur with increasing frequency at higher elevations.
	www.cptips.com /altitud.htm (2233 words)

	CHEST: Effect of altitude on hand-held peak flowmeters (Site not responding. Last check: 2007-10-12)
		Using a spirometer in an altitude chamber, Kryger et al[2] found PEF in nine subjects increased 2.0% with ascent to 762 m; 6.3% at 1,515 m; and 12% at 2,272 m.
		Although the effect of altitude has been studied only on a specific PFM (Mini-Wright), all PFMs based on technologies affected by gas density should be affected by changes in altitude.[4] The magnitude of the altitude effect, however, may not be the same for other PFM models.
		Simulated altitudes were obtained by decreasing the pressure in the hypobaric chamber to a pressure that represented the target altitude.
	www.findarticles.com /p/articles/mi_m0984/is_n2_v109/ai_18022392 (1426 words)

	VeloNews: 2001 Tour de France Special Coverage
		Another way to simulate altitude is to reduce the partial pressure of oxygen in the air you breathe, without changing the air pressure.
		Instead of 21 percent oxygen, your room is stabilized closer to 12 percent oxygen (it varies, depending on the altitude of your house), to simulate 15,000 feet -- all for about $14,500.
		Altitudes up to 15,000 feet can be simulated.
	www.velonews.com /race/tour2001/articles/1306.1.html (611 words)

	WWII Memoir, (Site not responding. Last check: 2007-10-12)
		My first experience with hypoxia was in preflight, where we all had to pass the high altitude chamber test.
		In this test, eight or ten students would sit in a chamber which could be evacuated to simulate air densities at high altitude.
		This is the maximum altitude at which a person can absorb enough oxygen in his blood, breathing pure oxygen, and still remain functional.
	home.comcast.net /~bobhornbeck/wsb/html/view.cgi-html2.html--SiteID-34648.html (1170 words)

	Environmental Testing, HALT / HASS Testing, Temperature Testing Services Milwaukee : DATASYST Testing Services
		Environmental chamber sizes are available from 1 ft³, for a process using a single environmental chamber, to 250 ft³, for a process using the two chamber method.
		Chamber sizes available for humidity testing are 8 ft³, 32 ft³, 320 ft³ and 4000 ft³ with controlled environments of 5% to 98% RH.
		Altitude testing can be performed in a single phase, used to determine the altitude that a component fails.
	www.datasysttest.com /services.php?name=Environmental (691 words)

	West Houston Pilots Attend NASA Training
		They were then led to the high altitude chamber for their flight.
		The door of the chamber was then closed, and the internal pressure decreased to simulate a climb of 5000 feet per minute, to FL250 (25,000 feet).
		The main chamber was again "flown" to an altitude of 25,000 feet, while the smaller chamber climbed to a level of only 8,000 feet.
	www.westhoustonairport.com /HighAltitude.htm (778 words)

	ETC BioMedical Systems - Hypobaric (Altitude) Chamber (Site not responding. Last check: 2007-10-12)
		Chamber training is the most effective way to prepare aircrews in dealing with the problems that can occur at high altitude in the relative safety of a controlled environment.
		Chambers designed and built by ETC have been proven in service with U.S. and foreign militaries, the U.S. government and other clients around the world for more than 30 years.
		There are many reasons why the ETC hypobaric chamber has become the unit of choice for flight crew training in countries all over the world.
	www.etcbiomedical.com /bms_hypobaric.php (350 words)

	[No title]
		The hyperbaric chamber is not suitable for prevention or treatment of mild AMS because it prevents or at least slows down acclimatization.
		It is a common belief that a portable hyperbaric chamber must be carried at least on every commercial altitude trip on legal grounds (liability of the organizer) although to date neither particular legal rules have been published nor has litigation been instituted.
		A portable hyperbaric chamber should especially be considered when visiting an area where there is no possibility of quick and easy descent to lower altitudes.
	www.uiaa.ch /web.test/visual/MedCom/volume8.doc (1322 words)

	Westwind School of Aeronautics - Professional flight training academy located in beautiful Phoenix Arizona (Site not responding. Last check: 2007-10-12)
		After receiving thorough classroom instruction related to physiology and high altitude operations, you will "fly" the altitude chamber to a pressure altitude of 25,000 feet.
		At high altitudes, there is not sufficient air pressure for the lungs to use the oxygen that is in the chamber.
		Altitude Chamber Video Clip* (high speed connections only)
	www.iflywestwind.com /altitude_chamber.php (234 words)

	News Template (Site not responding. Last check: 2007-10-12)
		Airman 1st Class Maria Arteaga, altitude chamber operator, operates levers to let air out of and into the altitude chamber to increase and decrease the pressure while Tech Sgt. Idalina Foulk, NCO in charge of Aerospace Physiology Operations, gives instructions to cadets inside the chamber.
		Inside the chamber, Airman 1st Class Tyler Relph, altitude chamber inside observer, began the experience by helping the cadets familiarize themselves with their oxygen masks, helmets and equipment.
		Outside the chamber, Airman 1st Class Maria Arteaga was positioned and ready to operate two levers used for letting air out of and into the chamber to increase and decrease the altitude and pressure.
	www.peterson.af.mil /hqafspc/News/News_Asp/nws_tmp.asp?storyid=05-059 (1088 words)

	Commercial Humidity Altitude Environmental Test Chambers
		With CSZ altitude test chambers, you can control the temperature environment for testing while simulating various altitudes from site level to 40,000 feet (141 Torr).
		Altitude testing may be continued without temperature control up to 200,000 feet (.169 Torr).
		System is equipped for controlling altitude setpoints automatically with a regulating rate of ascent and descent by using manual adjustable valves.
	www.cszindustrial.com /products/thachambers/commercialaltitude.htm?src=bizcom (266 words)

	AeroMedical Training Institute (AMTI) - Altitude Chamber Training
		The academic portion of the AMTI Altitude Chamber Instructor Training curriculum includes atmospheric physics, gas laws, the physiological divisions of the atmosphere, the physiology of respiration, and the physiology of the human circulatory system.
		This training consists of altitude chamber familiarization training, chamber profile training, chamber operation training, chamber reactor management training and observation and critique of the customer chamber operating crew using the altitude chamber training profiles supplied by AMTI.
		AMTI develops and provides altitude chamber training profiles which are designed to meet the training needs of beginning students as well as experienced air crew members.
	www.amtiusa.com /amti_altitude.htm (478 words)

	Altitude and Vacuum Test Chambers - Tenney Strat Junior (Site not responding. Last check: 2007-10-12)
		The Tenney Strat Jr altitude and vacuum test chamber has a 1-1/4 cu-ft chamber capacity and can simulate altitudes up to 40,000 feet.
		The unique size, the smallest in the industry, uses the popular Tenney Upright Junior platform, which is specifically modified and reinforced to achieve altitudes up to 40,000 feet.
		Based on the most popular test chamber ever built, the Tenney Junior, the ST Junior test chamber combines proven reliability with innovation.
	www.lunaire.com /Tenney/strat-jr.asp (214 words)

	NASA Apollo Mission Apollo-1-- History of Spacecraft and The Accident - Apollo 204 Review Board
		The manned test (with the flight crew) was initiated on October 18 but was discontinued after reaching a simulated altitude of 13,000 feet because of the failure of a transistor in one of the inverters in the spacecraft.
		It should also be noted that in the altitude chamber tests the Command Module was pressurized with pure oxygen four times at pressures greater than 14.7 psia for a total time of 6 hours and 15 minutes.
		The Command Module was removed from the altitude chamber on January 3, 1967 and the spacecraft was mated to the launch vehicle on January 6 at Launch Complex 34.
	www.hq.nasa.gov /pao/History/Apollo204/history.html (1503 words)

	Publication Abstracts- Aerospace Medical Association
		In chamber flight profile 1 the subjects were first preoxygenated for 45 min and then exposed to a normoxic environment at altitudes of 25,000, 18,000, 14,000, and 8000 ft. Chamber flight profile 2 consisted of an 80 min exposure to 14,000 ft without preoxygenation or supplemental oxygen for the first 60 min.
		In chamber flight profile 2, a significant influence on postural control was reported for the eyes-open condition, when breathing air at 14,000 ft. These changes normalized when reaching ground level.
		VGE were observed in one of the 12 subjects after 75 min at 14,000 ft. Another subject complained of severe dizziness during the initial part of the decompression to 14,000 ft, and was excluded from further experiments.
	www.asma.org /journal/abstracts/v73n3/v73n3p184.html (402 words)

	Problem Statement
		The current Goodrich, Inc. altitude chamber is capable of running most tests.
		The chamber must be able to compensate for a heat dissipation of 100 Watts from the unit being tested.
		The internal chamber temperature must have a range from –75°C to 100°C at a maximum dynamic rate of 5°C per minute.
	www.engineer.gvsu.edu /bfg01/problem_statement.htm (334 words)

	UND Aerospace
		The course also includes two high altitude chamber flights: a Hypoxia Demonstration Flight to FL 250, and a Rapid Decompression Flight to FL 220.
		A one-day course designed to provide aviators who have had previous physiology training in an altitude chamber an opportunity to refresh and update their training.
		This course includes seven hours of classroom instruction and a chamber flight to FL 250 for the purpose of reevaluation of hypoxia symptoms and a rapid decompression chamber flight to FL 220.
	www.aero.und.edu /f6_Foundation/f2_Services/altitude_chamber.php (141 words)

	[No title] (Site not responding. Last check: 2007-10-12)
		Flying after an altitude chamber exposure is not recommended, because silent bubbles and bubble nucleii formed during the altitude chamber exposure, may expand and become symptomatic during aircraft flight at decreased atmospheric pressure.
		A flyer whose body tissues are in equilibrium at sea level achieves a condition of supersaturation during decompression to altitude, during the loss of aircraft pressurization or during simulated flights in an altitude chamber.
		In the case of altitude chamber induced DCS, students are no longer under the supervision of an aerospace physiologist after they depart the altitude chamber, thus, they should be instructed to be aware of the possibility of postflight symptoms.
	wwwsam.brooks.af.mil /af/files/fsguide/CHAP03R.DOC (8559 words)

	MedAire Expands Education Programs With Altitude Chamber Training
		TEMPE, Ariz. (September 24, 2002) MedAire, Inc. is now offering altitude chamber training for pilots and flight crew, allowing them to experience altitude sickness conditions such as hypoxia and rapid decompression first-hand.
		Altitude Physiology Training with Altitude Chamber course can be taken individually or in conjunction with any other business aviation training program.
		Altitude sickness is caused by either sudden or gradual loss of cabin pressure and can incapacitate pilots.
	www.medaire.com /altitude_chamber_nr.html (347 words)

	Powdermag Message Boards: HYPOXICO INSTALLS ALTITUDE CHAMBER AT MANHATTAN'S EXPLORERS CLUB
		The chamber simulates being at altitude by reducing the amount of oxygen inside the free-standing, soft-walled enclosure.
		Altitude training has been used by world class athletes for decades, but they had to physically move to the mountains to enjoy its benefits.
		Hypoxico's technology can simulate altitudes of up to 21,000 ft. The company's product line includes portable tents and at-home cubicles, as well as a unique sleeping mask kit that allows the user to sleep comfortably at a simulated altitude of his choosing.
	forum.powdermag.com /forum/showflat.php?Number=103126 (528 words)

	Moonport, CH18-3
		14 With the completion of the thrust vector alignment on 29 August, the test team moved the command module to the altitude chamber in the operations and checkout building and began mating the command and service modules.
		It was run on 11 October, but plans for an unmanned altitude run on 12 October, a flight crew altitude run on 14 October, and a backup crew run on 15 October also slipped.
		The first manned run in the altitude test chamber, on 18 October, experienced trouble after reaching a simulated altitude of 4,000 meters because of the failure of a transistor in one of the inverters.
	www.hq.nasa.gov /pao/History/SP-4204/ch18-3.html (1191 words)

	What's New
		The FCTec is installing a 25,000-ft. Altitude Chamber to support its mission of providing comprehensive capability to measure the performance of fuel cells and help accelerate the commercialization of this new technology.
		The Altitude Chamber will have the capability to independently control pressure, temperature and humidity while maintaining oxygen concentration.
		The Altitude Chamber is planned to be fully operational in July 2003.
	www.fctec.com /fctec_pressDetails.asp?ID=12 (99 words)

	White Sands Missile Range
		Altitude test equipment includes a small multipurpose altitude chamber, a small vibration altitude test chamber, and the large vacuum chamber (LVC) at the High Energy Laser System Test Facility (HELSTF).
		The small multipurpose altitude chamber can generate altitude environments from 500 feet below sea level to 80,000 feet above sea level.
		The small vibration altitude test chamber is used to simultaneously subject small test items to vibration and altitude environments to 40,000 feet.
	www.wsmr.army.mil /capabilities/st/testing/lab_fac/climat/lowpress.html (120 words)

	Hyperbaric Treatment
		The extent of the descent depends on the altitude at which the bag is used; as an example, at 4250m (14,000 ft), the inside of the bag is equivalent to 2100m (7,000 ft).
		The present CERTEC hyperbaric chamber is an improved version of a hyperbaric chamber that was originally designed in 1989 by a French and German team.
		Note that with the PAC the maximum pressure is limited by the pop-off valves to 2 psi, but you can adjust the valves to a lower pressure to accomodate patients who have trouble clearing their ears.
	www.high-altitude-medicine.com /hyperbaric.html (1476 words)

	Air Safety Link--A Lesson Learned: Get the Mask on Now
		That was the whole point of the condensed course in hypoxia, complete with a ride in an altitude chamber, that several of the participants in ALPA’s Advanced Accident Investigation Course took after their own course was completed.
		In the altitude chamber, which the UND Aerospace Foundation rescued from a U.S. Air Force junk-yard and refurbished, Joe Schalk, manager, and George Lamora, lecturer, from the UND Aerospace Foundation’s Aerospace Physiology program, helped their charges learn how to operate their individual oxygen consoles.
		In the UND chamber, at age 54, hypoxia gave him tingly hot flashes and a touch of anxiety, then lethargy leading to sleep.
	www.alpa.org /alpa/DesktopModules/ViewDocument.aspx?DocumentID=4953 (979 words)

	Carotid baroreflex control of heart rate during acute exposure to simulated altitudes of 3,800 m and 4,300 m -- ...
		of the increase was in proportion to altitude.
		The neck chamber technique is a useful tool for studying human carotid baroreflexes; however, there are some limitations.
		Cardiovascular responses to upright tilt at a simulated altitude of 3,700 m in men.
	ajpregu.physiology.org /cgi/content/full/273/4/R1219 (2837 words)

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