This may surprise nonpilots, but cranking up airplane engines--whether piston, turboprop or jet--has always been multistepped.

FORBES: Flying Eclipse's Pocket Jet

The Osprey, readers of this space will recall, is a remarkable "tilt-rotor" airplane, capable of taking off and landing vertically but able to rotate its turboprop engines in flight so as to fly like a conventional aircraft.

CENTERFORSECURITYPOLICY: Peace dividend on wings of the Osprey