Expert Details

Expert in Rolling Element Bearings, Flying Toys

Expert ID: 711476 Michigan, USA

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The majority of Expert's engineering experience has been in the field of high speed ball and roller bearings for both large and small gas turbine engines. He has significant experience with ceramic bearings and in the design of very high-speed metal bearings using the A.B. Jones, COBRA and SHABERTH computer codes. Expert is familiar with lubrication and sealing technology as well.

Expert has 28 years of experience in the design, research, and development of technologically advanced boomerangs. He has used his engineering skills to significantly improve the sport's technology, especially in the area of sustained (maximum time aloft or MTA) flight. Expert is the principal architect of the current U.S. Boomerang Association and has been the editor and principal author of the USBA newsletter for 15 years. He pioneered the transition from large boomerangs towards more efficient and safer small boomerang products as well as the development of maximum time aloft boomerangs recognized by NASA as an outstanding technology. Expert maintains one of the most complete libraries of boomerang literature and video, as well as one of the largest collections of boomerang technologies ranging from old Aboriginal boomerangs to modern high technology boomerang products.

Similar to the two-bladed boomerang, the cross stick has four blades and the pinwheel has six blades. Expert's experiences with these are similar to that of the boomerangs described above.


Year Degree Subject Institution
Year: 1977 Degree: M.S. Subject: Mechnical Engineering: Heat Transfer/Thermal Sciences Institution: California State University
Year: 1976 Degree: B.S. Subject: Civil Engineering: Sanitary Engineering/Mathematics Institution: California State University
Year: 1971 Degree: Subject: Oceanography Institution: California State University

Work History

Years Employer Title Department Responsibilities
Years: 2002 to Present Employer: Undisclosed Title: Owner Department: Responsibilities: Expert is currently involved in the marketing of flying toys on the internet, especially boomerangs, flying rings, and fine antiquities.
Years: 1991 to 2002 Employer: NTN Technical Center Title: Senior Staff Engineer Department: Mechanical Research Group Responsibilities: He was supervisor of the Mechanical Research Group involved in the development of advanced rolling element bearings for the automotive industry. He was also involved in the development of clutches for automotive FEAD systems, FEA, dynamic analysis, Weibull analysis, rolling element bearing analysis, and project management and testing of bearings and clutches.
Years: 1989 to 1991 Employer: General Electric Co. Title: Design Engineer Department: GE90 R&D Design Responsibilities: Expert was responsible for project management of large IR&D programs to develop high-speed mainshaft bearings for aircraft gas turbine engines. His major project was the development of all mainshaft bearings for the GE90, largest of all gas turbine engines used for aircraft propulsion. His duties included bearing analysis using SHABERTH and A.B. Jones as well as the design of support spring structures and oil dampers.
Years: 1982 to 1989 Employer: Teledyne CAE Title: Principal Engineer Department: Bearings & Seals Responsibilities: He was responsible for the design and development of ultra-high- speed and temperature rolling element bearings for small gas turbine engines used in military applications, including ATEGG, JTDE, Navy, Air Force programs. He wrote proposals, managed several large projects including the development of ceramic ball and roller bearings. He was also involved with gear and seal design, test rig design/testing, failure analysis, thermal analysis, FEA, rotor dynamics of gas turbine shafting, etc.
Years: 1977 to 1982 Employer: Pratt & Whitney Aircraft Title: Senior Analytical Engineer Department: Lubrication & Bearings Group Responsibilities: Expert was responsible for the thermal analysis of military and commercial gas turbine engine components, the design of lubrication systems, rolling element bearings, bearing analysis including fit-up, skidding, fatigue life, and more.
Years: 1976 to 1977 Employer: California State University, Sacrament Title: Graduate Research Assistant Department: Mechnical Engineering Department Responsibilities: He was responsible for the design of several solar collectors, including a concrete/glass design and a fin and tube type used to power a Serval refrigerator unit, as well as assisting professors in their daily duties.

International Experience

Years Country / Region Summary
Years: 1953 to 1968 Country / Region: Panama Summary: Expert lived in the Panama Canal Zone until graduating from high school in 1968. He is familiar with the language and customs of Latin American people.

Career Accomplishments

Associations / Societies
Expert is a member of the American Society of Mechanical Engineers, the Society of Automotive Engineers and the Society of Tribology and Lubrication Engineers.
Licenses / Certifications
Expert is a Registered Professional Engineer in Michigan.
Professional Appointments
Expert is currently an Associate Editor for STLE (Society of Tribology and Lubrication Engineers). He is past President of the United States Boomerang Association.
Publications and Patents Summary
Expert is the author of numerous technical papers and reports; a list is available upon request. He was previously the editor of publications about boomerangs.

Additional Experience

Training / Seminars
He has developed a training seminar for the analysis of rolling element bearings. He has presented seminars on the mechanics of bomerang flight at the University of Michigan and Notre Dame University.
Vendor Selection
He is knowledgeable about sources for rolling element bearing products and has demonstrated proficiency at sourcing components for a wide range of products in project engineering and program management.
Marketing Experience
Expert has considerable experience marketing products over the internet. He has created technical engineering web pages as well as web pages to market his flying toy products.
Other Relevant Experience
Expert is knowledgeable of regression analysis, mathematical modeling of systems, desktop publishing, and graphical and photographic preparation. He has an excellent command of engineering fundamentals and communications. Expert has an M.S. mechanical engineering degree with emphasis in thermal sciences. In his graduate work he designed fin and tube solar collectors. He has several years experience in aerospace conducting finite element models of gas turbine hardware, especially in bearing compartments.

Language Skills

Language Proficiency
Spanish Expert speaks and reads some Spanish.
French He is able to read some French.
Russian He is able to read some Russian.

Fields of Expertise

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