Posted January 27, 200817 yr youve probably seen it posted on forums somewhere, can a plane take off from a conveyor belt if the belt turns in the opposite direction of the plane at the same speed. anyway its finally going to be on mythbusters , wednesday january 30th at 9pm eastern time on discovery channel if anyone cares
January 27, 200817 yr mythbusters experiments have never been accurate to begin with. almost every episode is a joke. then came smash lab or is it crash lab?
January 27, 200817 yr everything they;ve done could be mathematically equated and answered without the cost... but also without the showmanship, who wants to see someone writing out equations besides me.
January 27, 200817 yr Banfelt;541904']everything they;ve done could be mathematically equated and answered without the cost... but also without the showmanship' date=' who wants to see someone writing out equations besides me.[/quote'] I refuse to believe you want to see equations written out either. EDIT: I want a conveyor belt on a plane now...
January 27, 200817 yr Banfelt;541904']everything they;ve done could be mathematically equated and answered without the cost... but also without the showmanship' date=' who wants to see someone writing out equations besides me.[/quote'] Equations are MODELS of what happens in real life. The real thing can differ strongly to what is modelled. Sometimes equations are completely off. There is no substitute for doing the real thing.
January 27, 200817 yr i think it could take off, because the plane would still be able to accelerate on the belt. Say the belt is going xspeed, then the planes wheels must turn xspeed just to stay on, since the wheels dont actually have anything turning them, and they just turn over the ground, the plane would still be able to move forward making the wheels spin like x2speed It's not organized but it's still pretty understandable tl;dr: It would take little energy for the plane to stay on the treadmill since the wheels are free turning, so the plane would just have to prove a little more than normal thrust to lift But i doubt it will happen because knowing myth busters they will chop and mutilate the logic of it, to fit what they want
January 27, 200817 yr Author i mean i thought it could take off since it doesnt accelerate using its wheels acting on ground, but its jet engines acting on air. i dunno i guess we'll see
January 27, 200817 yr Only cool thing they ever did was show me that water > .50 caliber bullets at two feet of depth.
January 27, 200817 yr sp0rk;541909'] EDIT: I want a conveyor belt on a plane now... ROFL <3 your new sig k
January 27, 200817 yr Wow people are stupid... Planes aren't driven by their WHEELS. You can turn the belt/wheels as fast as you want and it doesn't change anything. The plane will still move forward when the engine is engaged. Therefor if the belt is long enough for a normal take off, then the plane will take off exactly as it normally does, the wheels will just be rolling at a much faster rate. Been discussed a thousand times over, always with the same result...
January 27, 200817 yr i think it could take off, because the plane would still be able to accelerate on the belt. Say the belt is going xspeed, then the planes wheels must turn xspeed just to stay on, since the wheels dont actually have anything turning them, and they just turn over the ground, the plane would still be able to move forward making the wheels spin like x2speed It's not organized but it's still pretty understandable tl;dr: It would take little energy for the plane to stay on the treadmill since the wheels are free turning, so the plane would just have to prove a little more than normal thrust to lift But i doubt it will happen because knowing myth busters they will chop and mutilate the logic of it, to fit what they want i mean i thought it could take off since it doesnt accelerate using its wheels acting on ground, but its jet engines acting on air. i dunno i guess we'll see This is exactly why they're testing the theory. As long as there is going to be a debate on the subject, the Mythbusters will most likely test it. Although, I must agree that after 4(?) seasons they must be getting desperate... Smash lab is retarded.. They just build things and then destroy them, and the fact that they have almost unlimited funding just doesn't appeal to me.. Smash lab started with like a bunch of rich people with funding out the wazoo, Mythbusters started as 2 guys and a camera crew in a shop in SF.. They had to make their own stuff.
January 27, 200817 yr Jedi Pimp;541888']Exactly. Why even fucking run this test. Why would anyone in their right mind think that this would work. treadmill + plane = stationary plane = no lift = no flight = mythbusters desperate for episodes ideas. Stationary? It will only be stationary until they use that thing called an engine. Then it will move along the belt like a normal take off, creating lift, and then flying. The only difference is that the wheels will be spinning faster than they do on a normal take off. Mythbusters aren't the first one to try this. It's been done so many times I can't believe they are even making an episode about it. They must really be getting desperate.
January 27, 200817 yr BTW I WAS FIRST TO BRING UP THAT THERORY OF THE BELT AND WHEELS SPIINNING FAST SO I WIN AND ANYONE AFTER IS JUST A FUCKING CHEATER!
January 27, 200817 yr Themassacre, i agree but many of these can be solved by simple already proven equations, these are not questions that are difficult to figure out when thought out mathematically, and yes i agree the real thing will bring to light any strange variables but they are pretty laid out for a question like this, and any already unknow variables will be isolated within this attempt.
January 27, 200817 yr I dunno about turning in the opposite direction at the same speed... but I do know a guy around where I live has a conveyor belt that he uses to take off within about 100 ft. The belt turns the same direction that he is moving.... He can also land in about the same area landing on it as it turns the opposite way. It's pretty cool to watch. Obviously we're not talking a jet plane or anything like that... Just a single prop plane.
January 27, 200817 yr yeah its a single engine plane. 1 propeller not a jet engine they will be testing. SO this might be pointless any ways...:dunno: http://img175.imageshack.us/img175/1277/firstoh9.png http://img175.imageshack.us/img175/3571/secondkt1.png http://img251.imageshack.us/img251/261/thirdzd9.png http://img100.imageshack.us/img100/6290/fourthiq4.png EVEN IF I TOLD YOU WHAT HAPPENS NEXT WOULD YOU BELIEVE ME
January 28, 200817 yr It can take off, you guys who think it can't are retards. Go on a treadmill and stand on a skateboard... notice you can pull yourself forwards extremely easily no matter how fast the treadmill is going... The forward thrust isn't coming from the wheels, its coming from an engine pushing air in the opposite direction which has almost no relation to the wheels.
January 28, 200817 yr Simple solution: Get a helicopter so you don't need a runway to get up in the air. You just fly straight up.
January 28, 200817 yr qs2;541873']nope. unless they're simulating wind force.. which i doubt they'll do. depends how which way the belts will run
January 28, 200817 yr Author Banfelt;541970']Themassacre' date=' i agree but many of these can be solved by simple already proven equations, these are not questions that are difficult to figure out when thought out mathematically, and yes i agree the real thing will bring to light any strange variables but they are pretty laid out for a question like this, and any already unknow variables will be isolated within this attempt.[/quote'] please enlighten us with the equation for a question like this
January 28, 200817 yr Hell no, the principle behind a plane being able to fly is that the wings are shaped in a way such that when you move at high speeds, the speed of the wind below the wings is slower than the top, hence causing the air pressure above the wing to be lower than below the wings. What this does is that higher air pressure below the wings push the plane upwards. When it's a conveyer belt, the plane doesn't move relative to air molecules, and so there's no air pressure to push the plane upwards, hence no lift. You sir fail at Physics. There is no reason for the air to travel faster as because there isn't some magical force that makes it have to meet up with the same air at the tail end.
January 28, 200817 yr It can take off, you guys who think it can't are retards. Go on a treadmill and stand on a skateboard... notice you can pull yourself forwards extremely easily no matter how fast the treadmill is going... The forward thrust isn't coming from the wheels, its coming from an engine pushing air in the opposite direction which has almost no relation to the wheels. Your analogy fails, by grabbing the rails, you're exerting a force outside your system. Your system would be You, the skateboard, the treadmill. Better analogy is sit on the skateboard and try and push yourself forward by pushing off the belt. Also, yes the thrust doesn't come from the wheels, but the lift comes from the air moving over the airfoil. If the plane doesn't increase it velocity relative to the air it wont get enough lift to take off.
