An automotive seatbelt is meant to keep you from exiting the vehicle through the windshield in the event of a crash. An aircraft seatbelt is simply meant to keep you from exiting your seat in the event of turbulence. If an aircraft experienced the kind of crashes cars do they wouldn’t bother with seatbelts they’d just nail you directly into the coffin.
Beyond a certain point neither one will save your live, a body can only take so much g-forces. Guss the car's belt is overbuilt so much to make it easier to find your body.
The culprite is not Boeing, but the economic lust of the inverstors, and that the company culture of McDonnell Douglas was allowed to replace the culture which saw Boeing produce some of the best, and safest commercial aircrafts around, for more than half a century. Ask not if it is a Boeing or Airbus, ask when the Boeing was built. If it was built before 2007, enjoy the ride. If later, listen carefully to the safety briefing, and read the safety pamphlet. But remember, you still safer in a Boeing, than in you own car. All be it _statistically_ .
Boeing and Airbus doesn't manufacturer any seats... Recaro, Safran, Collins aerospace and others... However as already said, there is only one seat belt manufacturer AM Safe. For cars are 5 manufacturers... Also, there is no car brand vs any other... The comparison is Bosch vs Denso vs Aptiv vs Autoliv and on.
All of the rope failures occurred in close proximity to the knot. Please repeat with a bowline knot (ask a scout or sailor) as it is the only knot which will not induce compressive forces on the body of the material, thereby creating a stress raiser.
I was once in a Land Cruiser in Sudan, which had been crashed. There were holes in the dash and steering wheel where the airbags had been and the seat belt tensioners had triggered (nobody using the belts, ha ha, Allah decides) and both front belts were so tight that I actually couldn't deflect them with my hand, they might as well have been steel beams. Amazing.
The Boeing belt segment is old by the frayed sides, dull fuzzy look and dirt. Besides, both belts are not made by their respective brands, but contracted out. Both belts are far stronger than they have to be.
Car seatbelts are designed for protection from impact, whereas an airplane seat belt is designed to prevent movement from turbulence. If you are in an aircraft that is flying and you have a "sudden impact" , no seat belt will do you any good...
Well, one could imagine scenarios in an airplane where the impact would not be hard enough that seatbelts wouldn't matter. Emergency landing in a field, or other semi favorable terrain for instance. It's not all or nothing.
My Grandfather used to use 3. Seatbelts tied together to tow cars with. The only problem he ever had was on a freezing cold night, he had only done 2 knots at the car end instead of 3, so it slipped loose.
Amazing channel, very good tests! But with the ropes, you can see they are breaking at the knots. The knot you are using is irrelevant for this test. I would recommend you use an "eight" knot or another knot with a high percentage of durability and repeat the tests, I'm sure the results will be very different.
If you need that u bolt clamp it doesn't matter how strong the rope is. If it just pulls though it falls makeing the Kevlar rope the worst performer. Also try getting something that fits the materials you are testing. So they are not getting scratched up. And the eye ring is terrible with a rough seam running around the inside. It needs changing to a flat cylinder.
Was the measurement from cylinder or from the belt? The result seems to be too low. The braking force was about 35G's for 100kg person. 35G is relatively mild crash. 50G is generally limit for severe injuries and 75G can easily happen in a highway crash. Usually safety belts don't snap.
@@lo2740 No. It is as I said. Some formula drivers have survived over 100g's. Inexperienced fit person can handle 6g's without loosing consciousness. Trained pilot can withstand 10-11g's in g-suit. World record for longer high g's is 46.2g. That was done in rocket sled by decelerating from 632mph in about one second. In car crash, peak g's are much shorter but goes higher than that. It's pretty simple math to estimate how many g's you have. Highway speed 75mph is around 33m/s. If you stop in 0.1s, that's about 33g's. With constant deceleration, that means about 1.6m distance. With 1m crushing depth, average g's are around 50. In practice, peak g's are higher. Head on collision from highway speeds into solid object or a vehicle with equal mass will typically expose 50-75g's. It is survivable in a vehicle with good crushing zones and airbacks but is getting close to the limit where g-forces themselves cause problems like brain damage. So, as a conclusion, you are mixing survivability with limits where physically unfit or normal persons can loose their consciousness.
@@robertheinkel6225 Maybe mine, because my back is not good, but there are still pilots who can go over 10 g's. However, in this context, it doesn't matter if human can take 9 or 10 g's on the airplane. This was about g forces in a car crash, and what I wrote about that is accurate. The dynamics and duration is much different in a crash and high g turn. In airplanes, highest g's are typically down, putting all the upper body weight on lower vertebraes in sitting position, which is not ideal. In a crash, forces are forward, putting much less stress on back.
The difference between _catastrofic failure_ and _fail safe_ . The aircraft seatbelt does not fail completely in an instance, but a little at a time, keeping some of it's function over a longer time. Which of these behaviours is to be considered better/prefered in an intended application, depends on the expected forces involved, duration of those forces, weight allowances, flamability of the materials, and certainly a few more considerations. So taking away from this video, that aircraft seatbelts are inferior to car seatbelts, is a flawed conclusion. It would be like saying that a wood driver is superior than a putter, because it can yeet the golfball farther. I don't play golf, but I suspect that there is a reason why we don't see people on the green, using the same club as they used at tee.
If it broke, it was correct. Idk what youre talking about. But this is true, only one side of the string creates less resistance. But it shows well what is the level of resistance before it breaks
El experimento NO está bien hecho en lo absoluto. 1. Usa un aro redondo en la parte inferior, ocasionando una tensión desigual. 2. Los amarres de las cuerdas y de la guaya de acero son incorrectos porque la tensión va directo al nudo...
Olbrzymi błąd przy teście linek 10mm. Ponieważ to linka stalowa powinna wygrać test gdyż to ona jako jedyna jest testowana ma pojedyńczej żyle natomiast wszystkie pozostałe na podwójnej!
Test is kind off pointless, since forces in an accident, would be a sudden jerk, not a steady build up of pressure Besides with the forces in either test you would be dead anyway.
A belt than hold back a human body with 3000kg applied, probably cuts the body in two. Is better to die before. In any case your is a good exercise to demonstrate the resistance of that belts.
I’m sorry, but I am going to repeat that at home First I need what kind of press you have, the lighting the cameras where do you get the seatbelts from? How much oil does your press take etc. send me that information and I will not repeat this at home ??? I promise maybe. In the meantime, I’m gonna go buy a home and get the garage ready 😊
Seatbelt performance is about a lot more than ultimate strength. Seatbelts are not designed to hold the body rigidly in place, but to allow controlled yield to limit the load transmitted (and resultant injury) to the body. (This is why all occupied belts must be replaced after a collision.) It is not apparent from these tests how much elastic or plastic deformation occurs over the test or how much energy would be dissipated in the event of a collision.
I do not think that this was an accurate test. (#NOT_AN_ENGINEER) Seatbelts are subjected to RAPID stress. (What they are designed for) Not gentle ones over a few min. It would seem to me that this is not a valid test if the intent was to compare crash values. Interesting findings though, if I ever find myself using a seatbelt to tow something... As others have pointed out the Airline Seatbelt look a lot older than the car. Again not a valid test. BUT you have a very interesting idea and it is worth doing again should the funds become available
I don't get the point of this test. A seat belts purpose is not to hold as much load as possible. If you apply such a high acceleration to a human body that causes this forces to the seat belt holding it in place, you have other problems to deal with. The seat belt is not the weakest point here.
You should splice and use timble to get real strength. Too many cutting points on the test. And do not round the rope and use knots.. try to test so that you have only one line of the rope at the time. here is one way to splice the rope. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-rbSg0_XXd2I.htmlsi=PXbF2Izb_-ZQpiDg
In the airplane seatbelts defense it could withstand 100k tons and the result of me surviving will not change. Airplane seatbelts are strictly for peace of mind lol. I am impressed with the car seatbelts first test win.
Not strickly. If you actually listen to what the safety briefing says. There is something called clear air turbulance. It is like regular turbulance, but like the Spanish Inquisition, it can not be expected. And it is equally unforgiving too. If you do not have the belt secured, you can break your neck as the aircraft (and thus it ceiling), free falls, while your inertia sees you not accelerating as fast. It is rather interesting to realise that in such a situation, it is not you who "fly up into the ceiling", but the "ceiling falling down" on your head.
@@bodan1196 dude nobody ask for you correction. The comment was a joke. Why is there always one jerk like you that feels need to correct people? I didn’t ask need or want your correction to a joke I made. What makes people like you feel the need to correct someone that doesn’t ask for it? Does it make you feel smarter than other people? I’d say how smart you are but you clearly aren’t. You were so excited to get to correct someone that didn’t ask. You couldn’t use common sense and realize the comment was in fun. Seriously you need to learn first common sense and once you do that learn people don’t need you to correct them unless they ask. It’s insane people feel the need to correct strangers. Well I hope you feel smart now.
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