- My Forums
- Tiger Rant
- LSU Recruiting
- SEC Rant
- Saints Talk
- Pelicans Talk
- More Sports Board
- Fantasy Sports
- Golf Board
- Soccer Board
- O-T Lounge
- Tech Board
- Home/Garden Board
- Outdoor Board
- Health/Fitness Board
- Movie/TV Board
- Book Board
- Music Board
- Political Talk
- Money Talk
- Fark Board
- Gaming Board
- Travel Board
- Food/Drink Board
- Ticket Exchange
- TD Help Board
Customize My Forums- View All Forums
- Show Left Links
- Topic Sort Options
- Trending Topics
- Recent Topics
- Active Topics
Started By
Message
re: Can this 747 take off?
Posted on 4/10/24 at 4:28 pm to Street Hawk
Posted on 4/10/24 at 4:28 pm to Street Hawk
If the wheel speed never allows the plane to move there is no way it can take off.
3
Posted on 4/10/24 at 4:31 pm to tigerfoot
some of you frickers have never drawn a force vector chart and it shows
Posted on 4/10/24 at 4:33 pm to tigerfoot
the wheels are essentially spinning at double the speed on the airplane, so the airplane is actually moving forward and creates lift. the wheels are just moving twice the speed until takeoff
Posted on 4/10/24 at 4:34 pm to tigerfoot
The engines push against air around the plane (or in proportion to the mass flow rate of exhaust out of the engine), not the ground.
The free-spinning wheels make the conveyor irrelevant.
The free-spinning wheels make the conveyor irrelevant.
This post was edited on 4/10/24 at 4:43 pm
Posted on 4/10/24 at 4:36 pm to Street Hawk
If you stand on a skateboard while on a treadmill holding a rope can you pull yourself forward?
Now imagine the rope is air and your arms are a propeller
Now imagine the rope is air and your arms are a propeller
Posted on 4/10/24 at 4:37 pm to Street Hawk
No the plane will crash off the end of the conveyor belt
Posted on 4/10/24 at 4:38 pm to Volvagia
quote:
Similarly, the conveyor doesn’t impart enough force to negate the thrust of the engines no matter how fast it moves.
The conveyor can be running at 10x times takeoff speed and it won’t stop the aircraft.
This. The wheels would just be spinning in the direction the conveyor belt is moving while the plane takes off. No force from the wheel is transmitted to the plane.
Posted on 4/10/24 at 4:41 pm to LNCHBOX
Is the plane stationary? My deduction from the question is that it is because the treadmill is long/wide as the runway (runway not moving of course). If the treadmill is matching the plane's speed, it doesn't matter how much the plane's engines turn, the plane will still be stationary. If the plane is stationary, it can't take off.
This post was edited on 4/10/24 at 4:42 pm
Posted on 4/10/24 at 4:46 pm to SaintEB
You could start this experiment with the treadmill spinning backwards at 1000mph and the plane tethered in place.
As long as the plane is generating forward thrust and the wheels are free to spin, the plane will go forward when the tether is released.
As long as the plane is generating forward thrust and the wheels are free to spin, the plane will go forward when the tether is released.
Posted on 4/10/24 at 4:47 pm to SaintEB
quote:
Is the plan stationary? My deduction from the question is that it is because the treadmill is long/wide as the runway (runway not moving of course). If the treadmill is matching the plane's speed, it doesn't matter how much the plane's engines turn, the plane will still be stationary. If the plane is stationary, it can't take off.
This is a fundamental misunderstanding of how a plane moves. The wheel are there for support and nothing else. No power is transmitted through the wheels, so the speed they spin and the direction they spin is irrelevant. The wheels are not connected to the plane via a driveshaft or any other type of transmission device.
Posted on 4/10/24 at 4:47 pm to SG_Geaux
quote:
If you stand on a skateboard while on a treadmill holding a rope can you pull yourself forward?
Yeah, but at that point your wheels are going faster than the treadmill, which negates the scenario, no?
Posted on 4/10/24 at 4:48 pm to LNCHBOX
Why dont planes just lay on their bellies when then want to take off then?
Posted on 4/10/24 at 4:48 pm to LegendInMyMind
quote:
Can this 747 take off?
quote:
is it made by Boeing?
Obviously you’re not a golfer
This post was edited on 4/10/24 at 4:57 pm
Posted on 4/10/24 at 4:49 pm to kaleidoscoping
quote:
Why dont planes just lay on their bellies when then want to take off then?
You serious, Clark?
Posted on 4/10/24 at 4:51 pm to LNCHBOX
quote:
This is a fundamental misunderstanding of how a plane moves. The wheel are there for support and nothing else. No power is transmitted through the wheels, so the speed they spin and the direction they spin is irrelevant. The wheels are not connected to the plane via a driveshaft or any other type of transmission device.
I know this. But the wheels are stated to be moving at the same speed as the treadmill. Thus, the engines are matching the speed of the treadmill which means the plane is not moving.
ETA: The plane has to propel itself forward to take off. If speeds are matched, then the plane isn't moving forward. It doesn't matter where the power is generated.
This post was edited on 4/10/24 at 4:55 pm
Posted on 4/10/24 at 4:52 pm to kaleidoscoping
quote:
You guys wanna wrastle?
Thumbs only.
Posted on 4/10/24 at 4:52 pm to SaintEB
quote:
But the wheels are stated to be moving at the same speed as the treadmill
The
wheels
are
irrelevant
Posted on 4/10/24 at 4:54 pm to LNCHBOX
quote:
The
wheels
are
irrelevant
In
this
scenario
they
are
relevant.
This post was edited on 4/10/24 at 4:54 pm
Posted on 4/10/24 at 4:55 pm to LNCHBOX
If the wheels are irrelevant, how do you get air flow under the wings? If the aircraft stays stationary, there’s no air flow.
Maybe I’m missing something.
Maybe I’m missing something.
Page 2 of 26
Popular
Back to top
Follow TigerDroppings for LSU Football News