lol i dont believe that it would require as much thrust as they make out, im betting a 747 could get off a conveyor system with maybe some issues with the tyres but with enough power of its own

Quote from: Daveyoure a bit late max - the problem has already been debated and explained over 4 pages

What a waste of time. Its such a dumb question to begin with. Ya want riddles, go to the riddle boards.

yep but you still managed to get it wrong on page 1 of this thread  

The explanation of the tyres was interesting.

all tyres have a speed limit, cars, buses, planes lol

Quote from: Daveyep but you still managed to get it wrong on page 1 of this thread  

Depending on the brand of bearings, I may very well have gotten it right.

Quote from: Nimrodwhen youre running on a treadmill do you get "wind blowing" into your face due to the speed at which youre traveling ?

Let me put it another way...
If you put the plane on a big "car" jack so that the wheels were not touching for the floor/conveyor or anything and stuck the engines on...would you take off ?

Sorry to say it but you are being dim

I thought exactly the same as you at first, but then when you think about it you realise you are wrong.

Unlike a car the power is not put through the wheels on a plane. You will get a little resitance due to friction in the wheels bearings, but that would not be enough to stop the plane taking off.

When you are running ona tread mill do your feet roll or slip on the belt? No, they stay fixed in position relative to the treadmill.

Think of it this way - if you stand on a treadmill with rollerskates on i could push you forwards relative to the machine, overcoming the small amount of reistance from the friction in the wheels.

Quote from: maximusotter

Quote from: Daveyep but you still managed to get it wrong on page 1 of this thread  

Depending on the brand of bearings, I may very well have gotten it right.

Ah you mean all new "Grit in a metal casin yarhgh" (TM) brand bearings?

Quote from: Nimrodok, I just want to come at this another way as I cannot see it myself...

Do you know those big roller things they use to test cars on? The car drives its wheels but the the rollers just spin so that the car stays stationary...

Am I right in thinking that youre proposing that if you were to put a plane on those rollers the plane would not be hindered because its thrust is not directly linked to the movement of the wheels ?

Obviously you missed something, forget the conveyor belt, you missed something very basic.

The wheels on a car power the car, it goes because the car wheels are in frictional contact with the ground. Lift the car off the ground, it now wont go anywhere cause it has no friction to push it along.

Put the car back on the conveyor belt, switch the car into neutral and take the brakes off, it will now tend to stay where it is because of inertia. Eventually the friction of the bearings will have some effect but that is minimal in this.

OK can a plane fly through the air? If you get any other answer than YES you need to see a brain surgeon. It fles because the thrust of the engine throws atmosphere back giving forward motion.

If a plane flies through the air then having its wheels touching a conveyor belt wont have any real effect. IT WILL still travel no matter what speed your conveyor belt is going at because the motion of its wheels dont come into the equation.

If the plane moves fast enough then it will fly,

For the wheel problem you could still use solid metal wheels

TBH I have no idea why this has gone on for over five pages...

Quote from: maximusotter

Quote from: Daveyep but you still managed to get it wrong on page 1 of this thread  

Depending on the brand of bearings, I may very well have gotten it right.

No maxi, unfortunately dave has you over the proverbial barrel on this. the conveyor belt would burn before the plane bearings had any real effect on the plane.

When you run on a Treadmill do you feel a breeze across your body like you would when not running on a treadmill.

Surely its not creating any pressure for air to flow over the wings & generate lift?

Quote from: Serious

Quote from: maximusotter

Quote from: Daveyep but you still managed to get it wrong on page 1 of this thread  

Depending on the brand of bearings, I may very well have gotten it right.

No maxi, unfortunately dave has you over the proverbial barrel on this. the conveyor belt would burn before the plane bearings had any real effect on the plane.

What if it was a very small plane on a very large conveyor Belt?

Quote from: EggtasticoWhen you run on a Treadmill do you feel a breeze across your body like you would when not running on a treadmill.

Surely its not creating any pressure for air to flow over the wings & generate lift?

are you on a wind up?

this has been explained already

Quote from: EggtasticoWhen you run on a Treadmill do you feel a breeze across your body like you would when not running on a treadmill.

Surely its not creating any pressure for air to flow over the wings & generate lift?

Same thing as the car though, lift your feet off the floor and you go nowhere anyway. How many times do we have to point out that jet engines dont push against the ground?

Size of plane makes no difference. A model plane on a big belt would have the benefit of the belt pulling air along towards it so it might be able to take off while remaining stationary.

Quote from: Dave

Quote from: EggtasticoWhen you run on a Treadmill do you feel a breeze across your body like you would when not running on a treadmill.

Surely its not creating any pressure for air to flow over the wings & generate lift?

are you on a wind up?

this has been explained already

Only in Theory....