Another idea would be to use say, 3 runways offset by 60 degrees, ensuring that at worst, the crosswind would be at worst 30 degrees off the nose ... I doubt it has been tried though
Nope, never...(from a cherished book I have...)
BTW, just as a thought on the circular concept, the max bank angle, and turns below 400 would make some interesting designs and issues. With max bank angle, you would probably look at close to a 4nm radius, and then many aircraft would have issues with any turn below 400 feet.
Most aircraft would be close to 100 to 140 kts at the threshold, given the weight, and coeff of friction on the tires, it would be like Daytona with a 40 degree bank for a 4nm radius, make it about 30nm radius.
Imagine DEP?!?!?!
