Old conveyor argument

[AKIron]

I don't know that.

[CptTrips]

I don't know that.

They needed a diagram. 

[AKIron]

"I don't know that" was the bridge guardian's answer to the question "African or European". 

[CptTrips]

"I don't know that" was the bridge guardian's answer to the question "African or European".

Doh!  I didn't catch that.

 

[hitech]

To switch topics any of you ever looking into the down wind faster then the wind car with the big prop?

My brother and I went back and for on that one for about 6 months.

HiTech

[CptTrips]

To switch topics any of you ever looking into the down wind faster then the wind car with the big prop?

My brother and I went back and for on that one for about 6 months.

HiTech

Would that be similar to a sailboat tacking against the wind?

That always amazed me.

[toasted]

Would that be similar to a sailboat tacking against the wind?

That always amazed me.

it makes sense when viewed as...

 upwind, draws power from the wind and transfers it to the wheels.
 downwind, power from the wheels transfers to the rotor:

[AKIron]

[AKIron]

Could have used AI to illustrate in a "discussion" about atmosphere and a flat earth a while back. No dome needed. Gravity is a real thing and keeps the atmospheric pressure the same in this cylinder as that on the outside at various altitudes whether either end or both are closed or open.

Seal both ends and remove the cylinder far from the Earth and entropy equalizes the air pressure throughout the cylinder. Stand it upright back on the Earth and the pressure then changes to match that of the corresponding altitude outside the cylinder.