It's been a while - and we have new blood...

[Drizzt66]

Yes, the plane will take off, no problems.

Forward movement is acheived by thrust from the engine or from the
propellor not from the wheels. When the plane gains speed and the conveyor
matchs it in reverse the wheels will simply turn at twice the speed of the
plain. Take off speed will still be acheived regardless of what the wheels
are doing. I think.

Just what the man said the plane pushes through the air the wheel speed is irrelevant

[Vultch]

Propellors don't push air over the wings, they pull the aircraft forward. Unless the propellor is at the back, in which case it pushes the 'plane forward.

It's the pressure differential caused by the shape of the wing and its forward movement through the air, that provides lift.

Actually they do...slightly..thou they are not designed to but as you say props are designed to pull the aircraft thru the sky, Mythbusters did the experiment and the plane took off but that was attributed to the air the prop was pushing over the wings and not forward airspeed

[madcampbell]

The riverboat example is interesting, but the X-factor is the river acting on the floats exerts FAR more resistance on the plane that the wheels in the example could ever hope to.

But would it fly....it may mean the river boat is exerting more power to keep it self stationary but then so would the conveyor belt with the weight of the plane on it!

[leighh]

Depends on the surface they are on

Say it was a conveyor belt?

and the type of tyre they are adding

... and say it was the type that they normally use for taking off on dry conveyor belts...

in the prevailing weather conditions

...and if there was no wind...

and the air temp.

it's perfect apparently, so let's call that 23 degrees - because everyone knows that that's the perfect temperature.

...Now answer my question!

[madcampbell]

Say it was a conveyor belt?

... and say it was the type that they normally use for taking off on dry conveyor belts...

...and if there was no wind...

it's perfect apparently, so let's call that 23 degrees - because everyone knows that that's the perfect temperature.

...Now answer my question!

Well you didn't read this then http://www.hiluxsurf.co.uk/showpost....6&postcount=10

[madcampbell]

slightly better put with this though Click answer

[IanB2]

But would it fly....it may mean the river boat is exerting more power to keep it self stationary but then so would the conveyor belt with the weight of the plane on it!

The weight of the plane adds negligible friction to the wheels/conveyor belt scenario, the wheels are free spinning, you could keep the plane from moving on the conveyor belt by placing your hand out and pushing on it (assuming the conveyor belt was at a standstill when you started, the inertia would be too much to overcome otherwise).

[Albannach]

This awaits people who, instead of setting questions on incompleteness, come to stay for a few days.

Surely that will have vapourised by then?

[Sancho]

Could you please clarify the location of tescos in this scenario.

[gwh200]

Surely that will have vapourised by then?

There are always more eggs and flour etc.

Could you please clarify the location of tescos in this scenario.

I can choose from 5!

[Albannach]

Could you please clarify the location of tescos in this scenario.

Don't listen to Graham, Tescos is on the Left, where the big manufacturing plant used to be.

[Sancho]

Don't listen to Graham, Tescos is on the Left, where the big manufacturing plant used to be.

In that case, no, it won't take off.

[gwh200]

It's on the right.

[yoshie]

But would it fly....it may mean the river boat is exerting more power to keep it self stationary but then so would the conveyor belt with the weight of the plane on it!

The boat push the water/conveyer where as the plane engines push air. The belt is meaningless.

Take the wheels off hang plane from a sky hook 2" above the belt open the engines up it move forward. Sky hook on a wire wheel on a belt no difference both are irrelevant.

Well done Andy I tried hard not to get involved but the urge to stop stupidity took over.

[shokenore]

Is the cake in the plane ?