Physics Puzzle

[WDIK]

Of course it has.

If the plane is unable to gain any forward movement, e.g. 85 knots then it ain't going up

the confusion arises because naturally we confuse the cause of forward motion ie traction.

a plane is devoid of forward traction.

trac·tion (trkshn)
n.
1.
a. The act of drawing or pulling, especially the drawing of a vehicle or load over a surface by motor power.
b. The condition of being drawn or pulled.
2. Pulling power, as of a draft animal or engine.
3. Adhesive friction, as of a wheel on a track or a tire on a road.

 

[Trazor]

a plane is devoid of forward traction.

Spot on, if you were to put a car on the conveyor, it would not move , because it is DRIVEN by its wheels.

To put it simply, a jet propels itself through the air, not its wheels.

 

[tim west]

It will depend on how much water it displaces

 

[doitall]

a plane is devoid of forward traction.

Spot on, if you were to put a car on the conveyor, it would not move , because it is DRIVEN by its wheels.

To put it simply, a jet propels itself through the air, not its wheels.

But until it gains the necessary land speed to give it lift it ain't going up.

 

[tim west]

only 37 pages to go

 

[doitall]

only 37 pages to go

I could copy and paste Trevor Thoms The Air Pilots Manual volume 1-6 if you like 370 ish pages in each volume

And if you ever get this plane in the air, I could copy and paste Poolies guide to ever runway in the country so you can land again

 

[WDIK]

a plane is devoid of forward traction.

Spot on, if you were to put a car on the conveyor, it would not move , because it is DRIVEN by its wheels.

To put it simply, a jet propels itself through the air, not its wheels.

But until it gains the necessary land speed to give it lift it ain't going up.

thats the point there is no land speed its object and air speed

 

[doitall]

a plane is devoid of forward traction.

Spot on, if you were to put a car on the conveyor, it would not move , because it is DRIVEN by its wheels.

To put it simply, a jet propels itself through the air, not its wheels.

But until it gains the necessary land speed to give it lift it ain't going up.

thats the point there is no land speed its object and air speed

Thats is the point, until the plane is traveling at its air speed it can't get off the ground. To do that it needs a land speed in excess of 85 knots

 

[WDIK]

no an air speed

 

[WDIK]

ok a plane has no engine but it has driven wheels,
so via the driven wheels it achieves flight velocity.
and it takes off glides and falls back to earth

 

[Trazor]

Thats is the point, until the plane is traveling at its air speed it can't get off the ground. To do that it needs a land speed in excess of 85 knots

According to you, if a plane came into land on this conveyor, the moment the wheels touched the conveyor,
the plane would have to stop INSTANTLY, because it can,t go forward..............

 

[doitall]

ok a plane has no engine but it has driven wheels,
so via the driven wheels it achieves flight velocity.
and it takes off glides and falls back to earth

Thats how gliders work

There's several ways to get them in the sky, and all require a land speed, once they're in the air they rely on thermal currents to give them lift.

 

[WDIK]

not land speed
speed through air ie the speed of air over the wing creating lift,
you said it yourself

land has no reference directly

 

[Trazor]

and all require a land speed,

You don,t require any land speed, you could theoretically, fly a plane in a very large wind tunnel, land speed zero.

 

[WDIK]

YES YES YES