Author Topic: Airplane on a Conveyor Belt... (Read 25977 times)

WWhiskey · « **Reply #45 on:** January 30, 2008, 09:06:28 PM »

oops sorry!!!
nice avatar tho!

Holden McGroin · « **Reply #46 on:** January 30, 2008, 09:07:36 PM »

Quote

Originally posted by eskimo2

When the brothers leave the air show they request a formation take off. They line up wing tip to wing tip and apply power at exactly the same time. All three planes weigh exactly the same and must hit 50 mph to lift off. When Chuck’s plane lifts off his wheels stop spinning instantly since they have no mass. Since they have no mass, they also have no rotational inertia.

Why would they stop spinning? Zero rotational inertia at zero RPM would be equal to zero rotational inertia at 1000 RPM.

That being said, airplanes fly due to airspeed, not groundspeed.

Donzo · « **Reply #47 on:** January 30, 2008, 09:08:22 PM »

Plane + steel cable hooked to a winch.

Plane sits on conveyor belt.

Conveyor belt moving in opposite direction while winch pulls the plane the forward will not prevent the plane from moving forward.

This is exactly what the engine(s) of the plane will do...move the plane forward no matter what the ground underneath is doing.

Treize69 · « **Reply #48 on:** January 30, 2008, 09:12:27 PM »

As long as the ground isn't moving faster than the wheels can rotate safely, you could have the belt moving 200mph for a plane with an extremely low takeoff speed (like a real ultralight, not the one they used) and it'll still take off.

This is one of those things thats so redicuoulsy obvious that the people who get it have no clue why those who don't can't, and the ones who think it won't work will never understand why they are wrong. Either you get it or you don't.

Chairboy · « **Reply #49 on:** January 30, 2008, 09:15:04 PM »

Nothing from Curval yet...

Holden McGroin · « **Reply #50 on:** January 30, 2008, 09:21:26 PM »

Convair tested this 50 years ago...

Treize69 · « **Reply #51 on:** January 30, 2008, 09:24:10 PM »

Yeah yeah, so did Curtiss

Yknurd · « **Reply #52 on:** January 30, 2008, 10:28:16 PM »

Quote

Originally posted by Holden McGroin
Why would they stop spinning? Zero rotational inertia at zero RPM would be equal to zero rotational inertia at 1000 RPM.

That being said, airplanes fly due to airspeed, not groundspeed.

So you are saying that airplanes could life off the ground if a strong enough wind blew?!?

Why, simply amazing!!!111

Wait, even if the plane was on a tread mill?

Astonishing, it is!!!111

FBBone · « **Reply #53 on:** January 30, 2008, 10:30:45 PM »

Quote

Originally posted by Yknurd
So you are saying that airplanes could life off the ground if a strong enough wind blew?!?

Why, simply amazing!!!111

Ever heard of a kite?

Russian · « **Reply #54 on:** January 31, 2008, 12:01:01 AM »

So they took off.....not surprising.

Chairboy · « **Reply #55 on:** January 31, 2008, 12:20:12 AM »

Well, evidence (and by that I mean some posts here) suggests that there are some folks here that'll be pretty surprised.

Still no Curval...

Holden McGroin · « **Reply #56 on:** January 31, 2008, 12:21:17 AM »

Curval's trying to jump off his treadmill: No luck so far.

Arlo · « **Reply #57 on:** January 31, 2008, 12:49:04 AM »

Quote

Originally posted by Chairboy
Well, evidence (and by that I mean some posts here) suggests that there are some folks here that'll be pretty surprised.

Still no Curval...

I'm not surprised but thrust versus drag seems just as important in formula as lift according to basic aerodynamics. I'd hate to see them try it with an ultralight .... for the pilot's sake.

Yknurd · « **Reply #58 on:** January 31, 2008, 06:08:01 AM »

Quote

Originally posted by FBBone
Ever heard of a kite?

You are quite the literary Illuminati aren't you?

C(Sea)Bass · « **Reply #59 on:** January 31, 2008, 06:39:41 AM »

Quote

Originally posted by FBBone
Ever heard of a kite?

A who?