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Dear David

Can there be more than one pair of Rotor blades in a Helicopter?.

If yen, what are the advantages or disadvantages?.


Hi, Prashant:

There are several models of helicopters with more than one set of rotor blades, most notably the CH 46 Sea Knight, the CH-47 Chinook, as well as some Russian examples.   The CH-46 and Ch-47 are "tandem" mounted twin rotors (one in front of the other) whereas some other designs have twin rotors mounted one on top of the other....

Also, there has been an evolution to the Bell/Boeing V-22 Twin "Tiltrotor," which is a cross between an aircraft (when the rotors are tilted forward) and a helicopter (when the rotors are moved to an upright position).  The V-22 shows a real advantage in terms of both the size of the "lift" and its forward speed, when compared to typical helicopters.

I hope that this helps!

David A. NewMyer


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David A. NewMyer


I can answer questions about aviation industry employment, airports and airport planning and aviation industry regulation (overall regulation of the industry--who regulates what and why).


I have worked in aviation since the late 1960s, primarily in airports, airport planning and in aviation education. I have done major research in aviation employment and in graduate education in aviation.

University Aviation Association since 1982 (President, 2009-2010)

Collegiate Aviation Review Journal of Aviation/Aerospace Education and Research Journal of Air Transportation ATEA Journal SIU Press

B. S. in History and Government, University of Redlands, California, 1969 M. A. in Political Science (Metropolitan Studies), Drew University, Madison, New Jersey, 1971 M. S. in Transportation, Northwestern University, Evanston, Illinois, 1974 Ph.D. in Education (Education Aministration and Higher Education), Southern Illinois University Carbonale, 1987

Awards and Honors
United Airlines William Wheatley Award from the University Aviation Association, 1994 for excellence in Post Secondary Aviation Education Sorensen Award for Excellence in Research, University Aviation Association, 2008

Past/Present Clients
Prepared airport master plan and environmental assessment reports for several Illinois Airports; prepared two separate airport systems plans for the Chicago area

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