This book describes in superb pictures and text the fascinating genre of
tilt rotor airplanes. Since the first helicopters flew, attempts have
been made to create a link between the mobility of the rotorcraft and
the speed of the winged airplane. At first these attempts failed simply
because of constructive difficulties, since the technology had not
advanced far enough. The progressive development, though, created in the
past decades new possibilities, and thus led to the V-22 "Osprey", which
has meanwhile been produced in series and is used by the U.S. forces. A
civilian model, the Bell/Agusta BA 209, will soon be introduced
commercially.