[Hillarys Gate Cult]

Just reread my last post. I meant that the FOD screens are only useful on takeoffs and landings.

[GBA]

Exactly, that's the point. The engine doors close and they suck air through vents on top of the wing while on the ground.

The MiG-29 was originally designed to be able to operate off of much rougher, improvised or forward field conditions than the perfect and well manicured, FOD free runways our jet engines like best.

It's an interesting solution to a common problem. Remember the Concorde crash, Air France Flight 4590?