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What actually happens when fighter pilots take off their masks

Published by Business Insider on Sun, 10 Jan 2021


<p><img src="https://static1.businessinsider.com/image/5c5b3424342cca0de759c55d-1400/3950987.jpg" border="0" alt="Zoe Kotnik F-16 Air Force pilot" data-mce-source="US Air Force/Samuel King Jr." data-mce-caption="Capt. Zoe Kotnik clips on her mask in her F-16 Fighting Falcon prior to a sortie at Eglin AFB, Florida, November 2017."></p><p></p><bi-shortcode id="summary-shortcode" data-type="summary-shortcode" class="mceNonEditable" contenteditable="false">Summary List Placement</bi-shortcode><p>What happens if a fighter pilot takes off their mask' Movies like "Independence Day" and "Top Gun" portray it as a final act of desperation that's strictly against regulation. But is this true' Before we get to the answer, let's first look at the purpose of the mask.</p><p>A fighter pilot's mask is primarily used to prevent the pilot from getting hypoxic, which is the lack of oxygen to the brain.</p><p>As part of our training, we'll go into an altitude chamber where the atmosphere is reduced to one-third of what it is at sea level. The purpose of the training is to recognize our symptoms so that we can take emergency action should we experience it while flying.</p><p>For most people, their symptoms start off as tingling in their fingers, followed by light-headedness and mild euphoria. Left unchecked, this can quickly lead to confusion and eventually to losing consciousness, which can be catastrophic in a single seat aircraft. Modern masks also have several additional features to aid the pilot.</p><p><img src="https://static4.businessinsider.com/image/5a00871942fd7514835a9d29-2400/defensegovnewsphoto060803-f-2907c-107.jpg" border="0" alt="Air Force fighter pilot" data-mce-source="US Air Force" data-link="http://commons.wikimedia.org/wiki/File:Defense.gov_News_Photo_060803-F-2907C-107.jpg"></p><p>Nearly all masks have a microphone built into them. By pushing a button, usually on the throttle, the pilot can communicate across one of the several radios onboard the aircraft.</p><p>Some also have a light built into them. Typically, at night we'll fly with the cockpit as dark as possible, however, when reading a map or writing, we'll push a button inside the mask with our tongue, activating the light for a short amount of time. The most important innovation though has been the ability to smartly regulate the pressure inside the mask.</p><p>As altitude increases, breathing becomes more difficult because the pressure inside your lungs no longer has a large differential to the air pressure outside your body.</p><p>By introducing positive-pressure and forcing air into the pilot's lungs, this effect can be countered, reducing fatigue on the pilot. Positive pressure also helps us to counter the G-Force we experience during heavy maneuvering.</p><p>I weight 210 pounds, 240 with my gear on. If you've ever been on a roller coaster that does a loop and pushes your head down, that's about 3G's. In a modern fighter, we'll <a href="https://www.sandboxx.us/blog/dogfighting-in-an-f-16-what-it-takes-to-win/">pull 9Gs</a>. That's over 2,000 pounds of force crushing me into my seat. It feels like a car is parked on your chest. This can make it extremely difficult to breathe. By forcing air into the pilot's lungs, modern masks help us breathe under high G for sustained amounts of time.</p><p><img src="https://static5.businessinsider.com/image/5ff6b39cd184b30018aad735-800/4185190.jpg" border="0" alt="Air Force A-10 Thunderbolt Warthog" data-mce-source="US Air Force/Senior Airman Mya M. Crosby" data-mce-caption="US Air Force Capt. Cody Wilton, A-10 Demonstration Team pilot, prepares to takeoff during the 2018 Heritage Flight Training and Cerification Course at Davis-Monthan Air Force Base, Arizona, March 4, 2018."></p><p>Now that we've gone over what the mask does, let's talk about the air pressure inside the cockpit. Fighter aircraft are different than civilian airliners: In order to save weight and space, we don't maintain constant pressure inside the cockpit.</p><p>From sea-level to 8,000 feet, we don't pressurize it at allit's the same as if a hole was cut in the canopy. From 8,000 feet to around 25,000 feet, we maintain 8,000 feet inside the cockpitsimilar to many ski resorts. Once we climb above 25,000 feet the cockpit altitude slowly rises so that by the time we're at 50,000 feet, the pressure inside the cockpit is equivalent to about 20,000 feet, or the altitude of some of the tallest mountains in the world. (Everest is 29,000.)</p><p>So, what happens if a pilot takes off their mask' The answer is it depends. If they are cruising under 25,000 feet, they can fly for a long period of time with their mask down and not feel any effects. We don't though because a cockpit depressurization could rapidly suck out the airmuch faster than an airliner due to how small our cockpit is.</p><p>Additionallyas anyone who's visited a high city can attestit's easier for fatigue to set in. Above 25,000, though, extended time without a mask will eventually cause hypoxia.</p><p>Because dehydration can be equally detrimental as hypoxia in a fighter, most pilots will drop their mask several times throughout a flight to drink water, and for longer missions, to eat. As long as it's just for a short time, the effects are negligible and actually encouraged by our aerospace physiologists.</p><div><iframe width="560" height="315" src="//www.youtube.com/embed/x3NKK86K7Zc" frameborder="0" allowfullscreen></iframe></div><p>Make sure to check out Justin Lee's podcast, <a href="https://www.professionalsplaybook.com/" target="_blank" rel="noreferrer noopener">The Professionals Playbook</a>!</p><p><strong>SEE ALSO:&nbsp;<a href="https://www.businessinsider.com/what-its-like-to-fly-an-f16-at-maximum-speed-2020-12" >'At 1.6 Mach, the jet started to shake': What it's like to fly an F-16 as fast as it can go</a></strong></p><p><a href="https://www.businessinsider.com/what-air-force-fighter-pilots-face-masks-actually-do-2021-1#comments">Join the conversation about this story &#187;</a></p> <p>NOW WATCH: <a href="http://www.businessinsider.com/f35-pilot-fighter-jet-training-2016-12">This is how pilots train to fly the F-35Americas most expensive fighter jet</a></p>
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