Tilt-rotor aircraft, which can take off like a helicopter and fly like an airplane, have already proven their worth in military use. Now AgustaWestland is developing the first one aimed at the civilian aircraft market. The executive version of the AgustaWestland AW609 TiltRotor (formerly known as the Bell/Agusta BA609) will carry up to nine passengers in a pressurized cabin, and promises to reduce point-to-point travel time for many trips. Tilt-rotors are considerably faster than helicopters and can travel lon…