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Expert Details

Aeronautical Engineering; Aircraft Propeller Design and Propulsion Integration on Propeller-Driven Aircraft

ID: 736805 Ohio, USA

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Aeronautical Engineer: Nearly forty years of aeronautical engineering and management experience with major airplane, helicopter, turbine-engine, and propeller manufacturers. Significant experience with propeller design and propulsion integration on propeller-driven aircraft, including FAA certification for Part 35 and Part 23. Former FAA DER and ODA administrator who has completed over 50 FAA STCs for Part 23 aircraft. Additional specialties include aerodynamics, performance, ground test, flight test, design, icing, propulsion, vibration, and program management. Personally built and test-flew six airplanes including three airplanes that he designed.


Year Degree Subject Institution
Year: 1992 Degree: Masters Subject: Aeronautical Science Institution: Embry-Riddle Aeronautical University
Year: 1982 Degree: BS Subject: Aerospace Engineering Institution: The University of Michigan

Work History

Years Employer Title Department
Years: 2001 to 2020 Employer: Hartzell Propeller Inc Title: Manager, Aircraft Applications Engineering Department: Engineering
Responsible for aircraft/engine/propeller integration on approximately 100 domestic and international aircraft programs concurrently. These included turbine, reciprocating, hybrid and electric powerplant installations. Specific areas included aerodynamic performance, propeller blade aerodynamic, acoustic and structural design, ice protection systems, flight test; and FAA certification activities. Member of ASTM F39.05 electric propulsion committee, GAMA Electric Propulsion Innovations Committee (EPIC), and Embry-Riddle Aeronautical University Hybrid Electric Research (HER) consortium for electric aircraft propulsion.

Served as FAA STC ODA administrator with the authority to issue FAA Supplemental Type Certificates (STCs) for Part 23 airplanes; previously served as a Designated Alteration Station (DAS) administrator. Served as a Part 23 Flight Analyst and Powerplant FAA Designated Engineering Representative (DER) for 18 years and now serve as an ODA Unit Member for these functions. Obtained or amended over 60 STCs for Part 23 airplanes.

Lead a team that identified and recommended new product opportunities to senior management. Served as program manager on the Pilatus PC-21 military trainer program during development of a 5-blade composite propeller. Lead a team that created propeller integration manuals for piston and turbine engine installations. Created and taught a 2-day short course on propeller design and aircraft / engine / propeller integration to several hundred engineers from organizations in the U.S., Europe, Asia and South America.
Years Employer Title Department
Years: 1996 to 2001 Employer: Hartzell Propeller Inc Title: Manager, STC Programs Department: Programs
Lead a program that identified propeller retrofit opportunities for aircraft, obtained STCs for the installations and sold hardware kits to operators. Duties also included marketing, advertising, forecasting, and resolution of support issues. Appointed FAA Designated Engineering Representative for Powerplant Installation; Flight Analyst.
Years Employer Title Department
Years: 1995 to 1996 Employer: Hartzell Propeller Inc Title: Engineering Programs and Certification Manager Department: Engineering
Responsible for U.S. and foreign Part 35 propeller certification. Conducted certification reviews with Russian, Chinese, Indonesian and several European aviation authorities. Managed engineering programs including the propeller chosen for the U.S. Air Force and Navy JPATS turboprop training aircraft.
Years Employer Title Department
Years: 1993 to 1995 Employer: Cessna Aircraft, McCauley Accessory (propeller) Division Title: Project Engineer Department: Engineering
Lead a group that was responsible for aerodynamic and structural design of propeller blades. Duties included ground and flight testing, vibration characteristics, fatigue life analysis, and certification. Developed a fatigue allowable for a shot-peened aluminum propeller blade. Completed certification of a 29-seat regional airliner propeller. Served as FAA Designated Engineering Representative for propeller 14 CFR 23.907 vibration (flight loads and structural integrity) approval.
Years Employer Title Department
Years: 1987 to 1993 Employer: GE Aircraft Engines Title: Aero/thermo Engineer Department: Engineering
Performed aircraft propulsion integration and aerodynamic design of military jet engine nozzles, thrust reversers and ducting systems, including vertical takeoff aircraft. Duties included test planning, model design and acquisition, data analysis and reporting on several exhaust system tests. Supported design studies with performance data, flow-path designs, CFD analyses, oral presentations and written reports. Conceived a nozzle design that was selected for over $1M worth of development. Invented a nozzle concept chosen for development during an international technology program.
Years Employer Title Department
Years: 1983 to 1987 Employer: Sikorsky Aircraft Title: Aerodynamicist Department: Engineering
Responsible for an 18-member test crew and a $10M powered wind tunnel model on the X-Wing V/STOL helicopter program. Performed test planning, calibrations, and data reduction, helicopter performance estimation; correlated aerodynamic computer programs.
Years Employer Title Department
Years: 1982 to 1983 Employer: Sikorsky Aircraft Title: Design Engineer Department: Engineering
Mechanical design of helicopter rotor hub components.
Years Employer Title Department
Years: 1981 to 1981 Employer: Lockheed California Company Title: Intern Department: Engineering
Participated in low-speed and transonic airplane wind tunnel tests in the “Skunk Works”, including the F-117 “stealth fighter” program, P-3 Orion patrol aircraft and the L-1011 airliner.
Years Employer Title Department
Years: 1979 to 1982 Employer: The University of Michigan Title: Technician Department: Aerospace Engineering
Designed, built, and tested wind tunnel models for aircraft, automobile and ship test programs.

Career Accomplishments

Licenses / Certifications
Registered Professional Engineer in the state of Ohio (currently inactive).
Former FAA Designated Engineering Representative (DER)
Former FAA Designated Alteration Station (DAS) administrator
Former FAA DAS Authorized Representative (AR) for several engineering specialties
Former FAA Organizational Designation Authorization (ODA) administrator
Former FAA ODA Unit Member for several engineering specialties
Private pilot, airplane, and glider ratings; over 2,000 hours of flight time in 35 aircraft types.
FAA aerobatic competency (low altitude air show) card, expired
FAA Airframe and Powerplant Mechanic certificates
Held FAA Repairman Certificates for several homebuilt aircraft

Fields of Expertise

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