SKYCRANE: Igor Sikorsky's Last Vision (Library of Flight)
McKenna is a graduate of Princeton and the Harvard Business School. While a lieutenant with the United States Air Force he served as procurement chief for engine instruments of all USAF jet engines. Hes been President and CEOs for several aerospace companies, including Sikorsky Aircraft where he started in engineering and finished as Division Executive FP. He is now a consultant to high tech companies.  Clive Whittenbury, author of Chapter 7 is a board member of Erickson Group Ltd of Oregon which bought all of the manufacturing and world wide support rights to the Skycrane and operates a fleet of commercial SKYCRANES.