Mythbusters tonight

[YOURADHERE]

Originally Posted by Chris M

Anyone watch? It was a big "No Duh!" to me.

I watched it. I was still pissed about them not airing it when I started this thread so I wasn't as enthused about it.

[armywarrant]

One time I decided to run over to my friends house on a treadmill and I never got there.

[BoyInBlue2658]

the plane wouldnt fly. if an airplane has enough thrust to pull it across the treadmill then why is it that on a max performance take off the plane doesnt move when the brakes are applied? the thrust to weight ratio on a general aviation aircraft differs from lets say a military jet. i missed the mythbusters episode. what was their opinion?

[mustard23]

Originally Posted by BoyInBlue2658

the plane wouldnt fly. if an airplane has enough thrust to pull it across the treadmill then why is it that on a max performance take off the plane doesnt move when the brakes are applied? the thrust to weight ratio on a general aviation aircraft differs from lets say a military jet. i missed the mythbusters episode. what was their opinion?

what most people thing is the driveing for come from the wheels. the wheels on plan are mostly freeflowing but yes they have a brake.. if the wheels don;t move it enugh friction to keep the plane steady.. what they should have shown is the fact the wheels on the tradmeal are goign twices a fast as those with out a tread mill.. a plane gets it thrust from the prop or the jet not from the wheels.

and damn Karie is hot with red hair.. but then I lik3e any girl that ether give me a beer or likes to blow things up..

[Chris M]

Originally Posted by armywarrant

One time I decided to run over to my friends house on a treadmill and I never got there.

When Airplane engines start sending power to the wheels, get back to me.

Originally Posted by mustard23

what most people thing is the driveing for come from the wheels. the wheels on plan are mostly freeflowing but yes they have a brake.. if the wheels don;t move it enugh friction to keep the plane steady.. what they should have shown is the fact the wheels on the tradmeal are goign twices a fast as those with out a tread mill.. a plane gets it thrust from the prop or the jet not from the wheels.

I was absolutely shocked that the PILOT of the plane in the Mythbusters episode didn't understand the simple physics of what moves the plane forward. He thought his plane was going to sit there like a brick and not take off. To his (and only his) amazement, he did take off while on a 'treadmill'.

[vtecprelude92]

I just sat here and read the whole thread and I am amazed...

The best way to think of this is:

Roller blades on a treadmill... If I am standing on a treadmill with a pair of rollerblades and the treadmill was running at 100 miles per hour... Now I am holding on to the bars so I am stationary... RIGHT... I am not moving at 100 miles per hour... Now you come up behind me and push me forward... Are you pushing me at 101 miles per hour no... You pushed me at 1 mile per hour... The plane works in the same fashion... The thrust is in no way transfered to to the wheels of the plane... It is pushing air... How would the flow of air ever be affected by a treadmill... On the other hand if an airplane required 300 mph to take off an there was a 300 mph tail wind blowing it wouldn't be able to then without moving at 600 mph... However if there was a 300 mile per hour head wind it would try to take off sitting still... Not actually take off because it would be unstable under those conditions... But lift would be created by the wings and try to lift the plane off of the ground...

[mustard23]

Originally Posted by Chris M

I was absolutely shocked that the PILOT of the plane in the Mythbusters episode didn't understand the simple physics of what moves the plane forward. He thought his plane was going to sit there like a brick and not take off. To his (and only his) amazement, he did take off while on a 'treadmill'.

yeah i was shocked about that also.. planes get lift from the air moveing over the wings... not ground speed.

now what they need to do is plane in a wind tunnle... and why we are at snakes on a plane..

[Chris M]

Originally Posted by mustard23

yeah i was shocked about that also.. planes get lift from the air moveing over the wings... not ground speed.

now what they need to do is plane in a wind tunnle... and why we are at snakes on a plane..

Right. Ground speed is irrelevant. Planes require AIR speed. The ground under the plane has absolutely nothing to do with the plane reaching air speed. The ground could be moving in any direction, and it wouldn't matter one bit.

[vtecprelude92]

I was just getting at the fact that its the wheels that freewheel and have no bearing on whether it moves...... It will definitely take off just like on mythbusters...

[mustard23]

what if you put it in an wind tunnel and had the wind blow the same speed as the thrust woudl it take off