Jet Airliner Certification Lengths Throughout History [feedly]

Jet Airliner Certification Lengths Throughout History
http://aviationweek.com/blog/jet-airliner-certification-lengths-throughout-history

Certifying and delivering a jet airliner even by modern and experienced manufacturers is challenging to say the least. Not since the 777 in the mid-1990s have we seen a new aircraft type flown and delivered within a year.