[pfflier]

Clever and breaking the norm. The radius of the circular runway will be the critical feature. The larger the radius, the closer to "apparent straightness" the runway will be. That means less bank for a landing airplane and less bank for runway construction.

Diminishing returns says too large of a radius makes the airport an impractical giant. On the plus side, urban encroachment will not diminish runway length.

Remember, it was initially difficult to land airplanes on a ship. It was thought to be very dangerous to land the shuttle in the glide mode with no go-around capability. Some people are stuck on the concept that future airplanes with be still configured as they are today.

[Nifster]

IF future planes have a different configuration then we can look at how airports should be configured