Originally Posted by
bloom
I may be reading it wrong (forgive me) but it looks like the 757 needs 71 feet or 21.6 meters to do a 180.
No, you don't want R3, you want the dimension labelled A (helpfully titled "Minimum width of pavement for 180° turn").
That's 120 feet or 36.4 meters for the 757-200 - though it would be a bold pilot who starts and ends a turn with the mains right on the edge of the runway.
