Vertical takeoff and landing planes will be possible

Gregory Benford : science fiction author and astrophysicist
In air travel, efforts to design and place in service a supersonic airliner by 1970 are well known. Less familiar, however, is another development of almost equal significance, vertical takeoff and land planes (VTOLS). Some, using jet engines, blow the air down for takeoff and landing, and rearward for forward cruise. Others, using props, tilt the engines or tilt the wings. The most recent, the Bell X-22, uses four ducted props, tilting them up or down for forward or vertical flight. Success of any of them could lead to transports that could carry passengers from downtown areas, bypassing hard-to-get-to airports

GREGORY BENFORD, Popular Mechanics, (2012), "The Future That Never Was: Pictures from the Past', [online], Available: