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 Expert  108097

Expert in Aerodynamics, V/STOL Aircraft, Aviation Design and Aeronautics

Available for your Consulting and Expert Witness Needs

Pennsylvania (PA)
Education Work History Career AccomplishmentsPublicationsConsulting Services Expert Witness

Summary of Expertise:

Listed with other top experts in: 

Expert undertook a three-year research project to study the near and far vortex wake of an aircraft. Flight testing, wind tunnel, and analytical studies were performed. A summary paper presented the first detailed measurements ever obtained on the far wake of an aircraft. He has testified in six litigation cases involving wake turbulence.




Expert has written two textbooks which include chapters devoted to the behavior of airfoils. He has studied airfoil behavior of marine propellors for two years. By teaching undergraduate and graduate courses on aerodynamics, he keeps abreast of the latest airfoil developments.


Both of Expert's textbooks deal with the design and analysis of aircraft. He spent two summers and six months at NASA's Langley Research Center doing research on aircraft operational problems. He has been responsible for helicopter stability and control at Vertol Aircraft Company. He has taught aircraft design, stability, and control courses and presently consults with an aircraft manufacturer.



aircraft control


aviation science


aircraft code



Expert was the project engineer on a research project on torpedo propeller design for five years. His knowledge of propeller analysis is described in two textbooks. His research on torpedo propellers resulted in doubling the silent speed of torpedoes. As Chief of Aerodynamics for the Vertol Aircraft Company, he was involved in the design of propellers and rotors. The methods which were developed from his research are the basis for the design of today's stern-operating submarine propellers. He also designed propellers for Evinrude Outboard Motors. He wrote a large computer program under a NASA contract to TRW to design propellers for general aviation.

marine propeller



Expert has taught courses on helicopter aerodynamics and dynamics for 25 years. He currently lectures in and coordinates a short course on helicopter design.



helicopter aerodynamics

Expert has considerable experience in conducting water tunnel tests relating to cavitation, marine propellers, drag, stability, and control of submerged bodies. He has worked on the hydrodynamic design of torpedoes and submarines. He has consulted on marine propellers, ducted fans, and planing boat hulls. His Ph.D. thesis was related to vortex cavitation.



submarine hydrodynamics

Expert has performed flight testing to reduce the drag of helicopters and wind tunnel testing on the drag of helicopters and wind tunnel testing on the drag on many shapes including trains. He was the project engineer on a two-year field testing program to reduce the drag of torpedoes by the use of laminar flow control.

aerodynamic drag

Expert's first textbook is entitled "Aerodynamics of V/STOL Flight" and is the only textbook available on this subject. He lectures in an annual short course on V/STOL aircraft. He participated in the design of the first successful tilt-wing aircraft undertaking stability and control studies, transition studies, and the design of the propeller. Some of the first data on unsteady jet flaps was obtained by one of his graduate students while several others have completed theses related to jet flaps and high lift systems.

short takeoff and landing aircraft


vertical or short take-off and landing aircraft

A teacher, researcher, and consultant in the field of aerodynamics, Expert is an expert in a variety of aerodynamic problems including applications in helicopter rotors, trains, underwater bodies, airplanes, propellers, fans, and wind power generation. He has written two textbooks covering the many facets of this field. He has chaired a committee which evaluated DOE's program on wind energy.


Expert has been involved in approximately 50 cases of aircraft accident litigation. He has provided expertise in activities such as flight testing, analysis of stability and control, study of wreckage, performance calculations, possible pilot error (he is an instrument-rated private pilot), and airload and structural calculations. Expert co-authored the reference book, "Aircraft Accident Reconstruction and Litigation", put out in 1995 by Lawyers and Judges Publications.


aircraft accident reconstruction

Expert has 50 years of experience doing and teaching applied aerodynamics. He has also authored one of the recognized texbooks on applied aerodynamics.

applied aerodynamics

Expert consulted on a new autogiro and designed the rotor. He also recently presented a paper concerned with predicting the performance of an autogiro rotor.


Expert has a Ph.D. in Aeronautical Engineering and has used Bernoulli's concepts repeatedly.

Bernoulli equation


Bernoulli theorem

Expert was Chief of Arodynamics for the Vertol Corporation and helped to design the CH-46 and has worked on several other projects conderning the design of rotor blades.

helicopter rotor blade



Show Secondary and Basic Areas of Expertise
Expert may consult nationally and internationally, and is also local to the following cities: Lancaster, Pennsylvania;  and Frederick, Maryland.

Year   Degree   Subject   Institution  
1954   PhD   Aeronautical Engineering   (Undisclosed University)  
1949   MS   Aeronautical Engineering   (Undisclosed University)  
1948   BS   Aeronautical Engineering   (Undisclosed University)  

Work History:
Years   Employer   Department   Title  

1992 to


(Undisclosed University)


Aerospace Engineering


Boeing Professor Emeritus


1985 to 1992


Penn State University


Aerospace Engineering


Boeing Professor


1959 to 1985


(Undisclosed University)


Aerospace Engineering


Professor (Head 1969-85)


1957 to 1959


Wichita State University


Aeronautical Engineering


Department Head


1955 to 1957


Vertol Aircraft Corporation



Chief of Aerodynamics


1954 to 1955


(Undisclosed University)


Engineering Research


Associate Professor


Career Accomplishments:

Expert is a member of the ASEE.


He is a Registered Professional Engineer in Kansas.

Professional Appointments

Expert is a former Editor of the Journal of the American Helicopter Society and a former Associate Editor for AIAA's Journal of Aircraft. He has served as Technical Director of the American Helicopter Society (AHS).


He is a Fellow of the AIAA and an Honorary Fellow of the AHS.

Selected Publications and Publishers  
 - Lawyers and Judges Publications  
 - Aerodynamics of V/STOL flight  
 - John Wiley and Sons  
 - Annual Aerospace Symposium  
 - General Aviation Aircraft Meeting and Exposition  

Consulting Services:
Recent Client Requests:
  • Automotive wind tunnel design expert for consulting on new automotive wind tunnel design for TATA MOTORS INDIA.
  • Expert for consulting on to assit in patent language for patent application.
  • Expert for consulting on Aerodynamic opportunity - Unique tethered aircraft.
Click the green button above to contact Expert for a free initial screening call regarding your expert consulting needs.  Expert is available for consulting to corporate, legal and government clients.  Remember, your initial screening call to speak with Expert is free.

Expert Witness:
Expert Witness Experience Summary:
Expert served as expert in over 50 ligitigations and has given depositions and court textimony.
Recent Litigation Client Requests:
  • Expert for consulting on air plane mechanic and repairs.
  • Helicopter expert needed for consulting on Helicopter.
  • electronic toy expert for consulting on patent infringement case related to a toy remote helicopter.
  • Expert witnesses helicopter mast bumping cases for consulting on mast bumping Robinson R22 2 blade rotors.
  • Expert in aerospace engineering for consulting on an intellectual property dispute over aircraft design and manufacture.
  • Expert in Helicopter Crash investigation for cause analysis of a news helicopter crash.
  • Expert witnesses in aircraft maintenance for case against aircraft manufacturer who also did retrofit.
  • Aircraft engine expert witness for consulting on small corporate jets, DC 3s, propeller plances.
  • Aircraft ground handling expert for consulting on aircraft ground handling.
Click the green button above to contact Expert for a free initial screening call regarding expert testimony, litigation consulting and support, forensic services, or any related expert witness services.  A few litigation needs include product liability, personal injury, economic loss, intellectual property (patent, trademark, trade secret, copyright), and insurance matters.  Remember, your initial screening call to speak with Expert is free.

Language Skills:
Foreign Language   Description
German   Expert is able to read some German.
French   He can read some French.

Additional Skills and Services:

He has organized and lectured in a one-week short course on helicopters for the last 17 years.


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