Aircraft comprising an airframe having a forward end, an aft end opposite
the forward end, a top extending between the forward end and the aft end,
and a bottom opposite the top side. The aircraft further includes a power
plant mounted on the airframe. In addition, the aircraft includes at
least two propellers rotatably mounted on the airframe and powered by the
power plant for moving the aircraft in a generally forward direction
during operation of the propellers. Also, the aircraft includes at least
two counter-rotatable fan sets mounted on the airframe and powered by the
power plant for providing upward lift to the aircraft during operation of
the fan sets.