We often talk about flights, but we have never wondered what causes a flight to the human body. The risks come from exposure to environment, from mechanical stress and from cosmic radiation.
In the second part we will speak for mechanical stress from gravity acceleration.
When a plane flies in a straight flight without changing course or speed, the passengers enjoy a smooth flight without acceleration. But a fast moving aircraft does not always stay on a straight path. The human body is made up of parts of different texture and density. It also has a vast system consisting of liquid moving through vessels. All accept the effects of acceleration with different way.
In general we have defined the acceleration from head to foot as positive force (+ G) and the force exerted from foot to head as negative (-G).
As a body performs a maneuver that will have a positive force, the first thing it experiences is a drop in blood pressure. The heart pumps blood to the head and has an opposing power to overcome. Blood accumulates in the legs and the blood supply to the brain decreases.
The human body has mechanisms to overcome it, increases heart contraction and heart rate and reduces the diameter of the vessels, but they take 4-5 seconds to complete. If the force exerted is great and for a long time, first we expect sight disorders. At start the color vision is lost and then the peripheral. If the force persists, occurs a blackout and after that a complete loss of consciousness (G-lock). The respiratory system is also affected, because the blood is confined to the bases of the lungs which do not have very good ventilation, we have a lack of oxygen. The chest also performs smaller respiratory movement. Even the skeletal system is being overwhelmed, the biggest problem is seen in the spine bones and the neck. If a seated pilot receives a force greater than 20G, even for a few seconds, he may suffer an immediate vertebral fracture, but usually we have chronic damages witch can cause problems on a long-term basis.
But what happens when we have negative G? There we have an exact opposite situation, the blood from the legs is collected in the head.
As blood accumulates in the head, there is an increase in blood flow, but acceleration is usually not so extreme that the pilot is at risk of vascular rupture. Nevertheless, the concentration of blood in the eyes is quite unpleasant. The eyes are initially red-out and if the force is maintained then we may have temporary blindness. In the respiratory system, again we have a decrease in oxygenation, as the organs of the abdomen transiently rise to the chest and squeeze the lungs. In really extreme conditions with -20g we may have psychological disorders that are probably caused by brain swelling and subside after 15 minutes. Although the effects of negative acceleration are generally milder to the body, pilots avoid them as much as they can because they are likely to affect vision much faster.
At this point it should be noted that the effects reported are intensities. In our daily life, technology has found solutions to many of our problems, and traveling by plane is one of the safest and most enjoyable ways to travel.
In the third and final part we will talk about the effect of radiation on the flight.
PART 1 : https://www.simpleplanes.com/Forums/View/999019/The-effects-of-aviation-travel-on-the-human-body-Part-One
@Viper3000ad idk what I said
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Ah yes learning for something that is not in IOS
Yes use sp
@AstleyIndustries They can with training and means from technology and medicine. Now I think we're at the limit of how much more we can give. Thanks for reading the article and commenting, I hope you like the next part.
@ChiChiWerx Thanks so much for reading the article. I'm always in a dilemma about how much data a non-professional might be interested in. Notherless I ranked "AGSM" as way of dealing the mechanical stress, not as an effect. Unfortunately in the article there things missing, like how the pilot's height or position in the cockpit affects his stamina. For the matter there is only a small picture, but if there is interest I can cover them. On the aircraft issue, remember the machines are made to human standards, the boundaries are there for us. Newer UAVs can have seemingly negative acceleration. In the 1970s, when there were no automatic systems, there were experiments with "liquid" ventilators that allowed greater stress. I was hoping there were questions to cover more topics, so I always appreciate your opinion.
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I need to make a G-meter lol. Also never knew pilots can take forces for so long, wartinder tells us that they only can hold a few seconds
Pilot: pushes stick
Body: yeah, it's big brain tine
You discuss Gs and the effect on the human organism, but if you’re going to cover the entire subject, you need to discuss the “G strain” maneuver. Additionally, not only are pilots more susceptible to negative Gs, likewise aircraft are almost always built to pull more positive Gs than negative Gs, though it’s arguable that this is done because pilots simply endure positive G better than negative Gs.
yup @Viper3000ad
@BACconcordepilot Correct. Of course -4g is too much. It is also releated from the time that the body accepts the acceleration. The red out of the eyes can also occur in -2g for > 15sec. Usually pilots in positive G tighten their abdominal and leg muscles to force some of the blood to the brain, but in negative G there is nothing you can do...
If you like it, the most interesting part is the last one about cosmic radiation.
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@BACconcordepilot Of course, protecting the patient's identity is always very important LOL. Did you liked the article?
@Nerfenthusiast Right, the suits have a tube like an umbilical cord usually on the left. This is linked to the fighter delivery system and depending on the acceleration it exerts, apply positive pressure on the lower extremities. Some suits have bladders containing water, while others (newer) have air.
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this is why fighter pilots wear g-suits it keeps blood from pooling in the legs quite interesting if you ask me
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@Viper3000ad ah ok. It was worth a shot. Looking forward to the next issue!
@Thelegitpilot13 Even if that kind of list existed, aerospace medicine doesn't work this way sorry.
@Viper3000ad like people who have suffered from radiation exposure due to high altitude flights. I’m sure there can be a few examples.
@Thelegitpilot13 listing examples?
If you talk about radiation damage, I definitely recommend listing examples. One I can think of is a character from Ace Combat 7, the main antagonist, Mihaly A. Shilage, who was basically stricken with sickness due to many long-exposure high altitude flights.
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