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re: Can this 747 take off?
Posted on 4/11/24 at 1:32 pm to Volvagia
Posted on 4/11/24 at 1:32 pm to Volvagia
Wrong. If the treadmill is going 100 mph in the opposite direction of the plane that is also traveling 100 mph then the plane will remain in a fixed relative location and there wont be any wind/lift on the wings
3
Posted on 4/11/24 at 1:33 pm to TD422
quote:
What do you do for a living, Chief?
I'm an engineer.
quote:
n my world, details matter
Doesn't seem like it.
quote:
You made an assumption that was not introduced into the parameters of the question.
Ok, if the plane does not use its engines to take off, the plane will not take off. Happy?
Posted on 4/11/24 at 1:34 pm to Volvagia
What about my earlier question? When you run on a treadmill, do you feel air blowing in your face? You're "thrusting" forward by running. Doesn't mean you're moving forward relative to the ground.
Posted on 4/11/24 at 1:34 pm to sidewalkside
quote:
If the treadmill is going 100 mph in the opposite direction of the plane that is also traveling 100 mph then the plane will remain in a fixed relative location
No it won't because the force of the treadmill will not be applied on the plane in such a way that would cancel out the force of thrust.
Posted on 4/11/24 at 1:35 pm to TD422
quote:
When you run on a treadmill
Completely unrelated to the physics of a plane.
quote:
You're "thrusting" forward by running. Doesn't mean you're moving forward relative to the ground.
Posted on 4/11/24 at 1:36 pm to TD422
This is my point exactly. When running on a treadmill or riding a stationary bike you do not feel wind blowing on your face because you are remaining in a fixed relative location.
Posted on 4/11/24 at 1:37 pm to TD422
quote:
What about my earlier question? When you run on a treadmill, do you feel air blowing in your face? You're "thrusting" forward by running. Doesn't mean you're moving forward relative to the ground.
I’m pressing against the ground trying to move.
The “ground” is moving to counter it.
Not sure why you think that is analogous to pressing against the air and expecting the motion of the ground.
Also, not sure why you would expect a stationary object to perceive a motion through the air.
You know, for a physics based subject, these are important “details”
Posted on 4/11/24 at 1:37 pm to sidewalkside
quote:
When running on a treadmill or riding a stationary bike you do not feel wind blowing on your face because you are remaining in a fixed relative location.
Put a jet pack on and turn it on and you'll feel some wind on your face.
Posted on 4/11/24 at 1:38 pm to Volvagia
quote:by who?
Again, this was physically tried!
Posted on 4/11/24 at 1:38 pm to sidewalkside
quote:
Wrong. If the treadmill is going 100 mph in the opposite direction of the plane that is also traveling 100 mph then the plane will remain in a fixed relative location and there wont be any wind/lift on the wings
You are confusing the speed of the wheels with the speed of the plane.
Planes can fly with wheels not moving at all because the thrust of the engine is on the atmosphere (no trust to the wheels).
The wheels are irrelevant to flight.
Posted on 4/11/24 at 1:38 pm to sidewalkside
quote:
Wrong. If the treadmill is going 100 mph in the opposite direction of the plane that is also traveling 100 mph then the plane will remain in a fixed relative location and there wont be any wind/lift on the wings
Why? The plane is still having a 100 mph airspeed.
It just has a 200 mph ground speed now.
I mean you do realize planes track both, right?
Because they are typically different?
Posted on 4/11/24 at 1:39 pm to LNCHBOX
quote:because you will exceed the speed of the belt?
Put a jet pack on and turn it on and you'll feel some wind on your face.
Posted on 4/11/24 at 1:39 pm to LNCHBOX
quote:
I'm an engineer.
Wow, I could just sense it. Engineers are NEVER wrong. Ask me how I know. (Psst....it's 35 years in construction trades).
Make some assumptions that everyone is on the same page with you, in your next set of specs. The bidders will LOVE you.
Posted on 4/11/24 at 1:40 pm to TD422
quote:
Wow, I could just sense it. Engineers are NEVER wrong. Ask me how I know. (Psst....it's 35 years in construction trades).
Awww someone is mad they couldn't make the grades to be the PE.
quote:
Make some assumptions that everyone is on the same page with you, in your next set of specs. The bidders will LOVE you.
Yea, you big mad. Contractors never ever frick up
Posted on 4/11/24 at 1:41 pm to Volvagia
quote:
Why? The plane is still having a 100 mph airspeed.
It just has a 200 mph ground speed now.
Wrong on both counts. If the treadmill is going in the opposite direction it has zero ground speed and thus zero airspeed. No air is flowing over the wings since the plane is stationary in space (even though the wheels are turning), so no lift, so no flight.
Posted on 4/11/24 at 1:42 pm to TD422
quote:
Engineers are NEVER wrong. Ask me how I know.
Oh, you can go right to hell right here.
This has gone on for pages and pages and he didn’t bring it up until YOU tried to make YOUR career relevant, Mr detail oriented.
So your career bolsters the value of your opinion, but is meaningless for his?
That’s the type of arse backwards thinking needed to think a belt can stop a plane from taking off
Posted on 4/11/24 at 1:42 pm to TD422
quote:He probably is.
Are you talking about the Mythbusters video?
Show me where they measured to speed of the wheels, they did not. The wheels in their experiment were moving faster than the belt.
Posted on 4/11/24 at 1:43 pm to LNCHBOX
Again, assumptions. I am neither an engineer wannabe or a contractor.
Assumptions AND arrogance. Yeah, your an engineer alright.
Assumptions AND arrogance. Yeah, your an engineer alright.
Posted on 4/11/24 at 1:43 pm to tigerfoot
quote:
because you will exceed the speed of the belt?
You could put a regulator on the wheels so that they do not exceed the speed of the belt.
And the jet pack will still push you forward so you feel wind in your face.
Posted on 4/11/24 at 1:43 pm to tigerfoot
quote:
Show me where they measured to speed of the wheels, they did not. The wheels in their experiment were moving faster than the belt.
Flat earther mad the experiment didn't go the way he thought.
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