the whole mith is
will a plane take off standing still
the convetor has to match the forwand momentem of the plane…
meaning the plane stays still
The plane won’t stay still.
It has a propeller to pull it forward, even if the speed was 100% matched the plane would still pull forward, because of the propellers, not the wheels.
The wheels still have nothing to do with it…
even if the conver belt was moving at the speed of light in the opposite direction , the plane would take off, the speed of the ground under the plane has nothing to do with it’s air speed, generated by the propeller, which means thier is air flo over the wings which generates lift.
omg drama
the plane turns into a helicopter and flies vertically upwards, end of story.
^i agree that the speed of the ground under the plane has nothing to do with air speed, but doesn’t speed of the plane on the ground affect lift?..meaning if the plane is stationary relative to someone on the ground, the plane would have no velocity to generate lift with? for the plane to lift off, the conveyor ramp length is important in seeing if there’s enough length to generate enough lift through the plane?
Dur it was no surprise.
Here, think about this how does a bush plane on floats take off then? If the plane on the conveyor wouldn’t take off, why would the plane on the water take off?
You’re all stuck looking at the propultion from the wrong way. It isn’t powered by the wheels.
Hell, if it needs the moving ground under it how the fuck does it fly?
Windspeed and groundspeed are two independant things. It’s possible for a plane to fly in one spot given a strong enough headwind.
wow this is extreme.
This is a easy concept that for some reason people cant get their head around. This will fallow basic physics laws. It should be able to take off and land without problems.
On air planes, the perpulltion is caused by the prop. which is not dependent on the wheels unlike a car. the wheels on a plane are free moving and will rotate at a faster speed than a normal take off. (conveyor belt+Speed of plane forward= wheel rotation speed). The wheels are only there for support.
Ex. think of when your roller blading. If you were to get pulled by something, you move( the pulling is = to the conveyor belt in the opposite direction). Its the same as a air plane. Your roller blades dont have perpultion at the wheels. you only move when you create a force backwards with pumping your legs(prop wash of the plane).
Also, this is the same concept a for landing. the only difference is when you come to a stop(only if breaks are used), the plane will be directed in the way of the conveyor belt which will bring it to a shorter landing.
Now if we were to say that the plane had fixed landing gear, then take off would not be possible. This is because there is a overall force of ZERO. With the prop wash going one way(which is connected to the plane), and the convener going the other way(which plane is sitting on. acts like attached) at an equal speed, then nothing will happen. Now if we said the speeds were not the same with fixed landing gear, then which ever speed is will win.
*note: This fixed landing gear would only work if the friction between the landing gear and tread meal can be over come with out any damage to either things. Also when i say fixed landing gear, i mean to not have wheel at all.
sorry or all the English mistakes, going to school for engineering not social science.
haha this makes me laugh that people still depate it.
and the Myth is if the plane will take off at all. Not take off on the spot.
Martino’s got it right.
Think about the opposite. What if the conveyor belt was moving in the direction of flight and the aircraft had its brakes on. The aircraft wouldn’t need to use its propulsion system at all because the belt would provide the necessary velocity to take off and glide. Of course the aircraft would only briefly take flight before returning to the ground because its lost its power source.
the propulsion system of an aircraft provides movement by displacing air, not by exerting force on the ground. if the ground had anything to do with it, then aircraft wouldn’t be able to maintain flight once they have left the runway.
your dad could have built all the boing planes in the world! that doesn’t mean anything here.
the question isn’t whether the plane can take off or not standing still.
the basic question is whether THRUST (by a propellor or by a jet) will move a wheeled object when the ground under those wheels is moving in the opposite direction
and the answer is yes. it will move. the wheels will just spin faster in the forward direction. if the backwards moving belt matches the forward speed of the object, the object’s own thrust will still propel it forward but the wheels will simlpy be turning twice as fast.
the fact that it’s a plane has nothing to do with it.
best way to visualize this is to put a toy car on a conveyor belt
then, as the source of thrust, use your finger to push the car from behind
as you accelerate the toy car forward, the conveyor starts accelerating at the same speed but in the opposite direction. the car is still being pushed forward by your finger, except its wheels are now spinning twice as fast. the car still moves forward.
the conveyor moving backwards has no effect on the forward motion created by the thrust from your finger pushing
got it?
I think the problem people have when visualizing this is the imagine the conveyor belt being very small…like a home treadmill so that the plane has nowhere to go. If you imagine the treadmill to be the length of a normal runway and there is room for the plane to move forward, you will soon realize the the speed at which the wheels turn have nothing to do with its ability to take off.
Welcome to last year Theo!
And guess what? I’ve ran for Charity before. I can now run for President.
u wanna fite abaut it
You think you can box?
This will work even if the airplane is sitting on the conveyor belt with its engine off, and moving backwards at speed along with the conveyor before it starts the engine for takeoff. It will amount to taking off with a tailwind, the thing that will determine whether it will takeoff or not is the length of the conveyor belt.
An airplane can takeoff “standing still”, or with no ground speed, as long as there is a headwind that is greater than its stall speed. You can get an airplane to “hover” at altitude by pointing it into the wind. This is because the wind at altitude is usually stronger than it is on the ground. This is also why airplanes parked outdoors are tied down, so they don’t blow away.
He knows I can box
:fnf2: