Aeronautical / Aerospace / Aerodynamics Engineering Expert Witnesses: 2

Floyd McConnell, PE, is a business leader and expert witness with Manufacturing Experience in the Aerospace and Defense Industry. With more than 40 years in the US and international aerospace manufacturing industry, Mr. McConnell leads a network of consultants that provide security, strategy, marketing, proposal, expert witness, and management services.

Mr. McConnell successfully managed the responsibility for overall financial performance and operations including the customer relationship and supply chain of diverse businesses within the Aerospace and Defense industry. His portfolio included commercial and military customers in Asia, Europe, the Mid-East, Africa, Australia, New Zealand, South America and the United States. He has set up supply chains and managed manufacturing and production lines for businesses in Korea, Australia, New Zealand, and multiple locations within the United States.  

Litigation Support: Mr. McConnell reviews cases involving technical or managerial decisions in the aerospace industry and their impact including engineering, management, quality, and program performance, schedules, and corporate decisions. He's been retained on 11 cases; 40% with AmLaw 100 and 20% with AmLaw 200 firms. Cases involve the largest firms in the industry.

Areas of Expertise:

Mechanical Solutions, Inc. (MSI) performs litigation support through its extensive engineering capabilities, and when required, through expert testimony. MSI uses advanced finite element analysis (FEA), rotor dynamics, and torsional analysis tools, and uses computational fluid dynamics (CFD) to analyze 3-D steady or unsteady fluid flows and heat transfer, enabled by its 230 high speed processor supercomputers.

MSI also uses top-of-the-line testing equipment, including multichannel FFT analyzers (up to 200 simultaneous channels) to accurately read the outputs of various vibration, stress/strain, and pressure sensors, as a function of both time and frequency. As a unique additional test capability, MSI uses motion magnification video cameras to amplify and display scene vibration by 1000x. MSI uses calibrated exciters while equipment remains running, to locate structural, rotor, and acoustic natural frequency resonances as they exist at any particular operating point, without interfering with machinery operation. In addition, MSI performs stress, acoustic, dynamic pressure pulsation, electric current spectrum, and aero/hydraulic performance testing.

Areas of Expertise:

Solving Challenges with Rotating Machinery Vibrations

William D. Marscher, PE, performs expert witnessing and engineering work in the field of Fluid Systems and their Rotating and Reciprocating Machinery, particularly large turbines, generators, compressors, and pumps. His typical work responsibilities include design, analysis, and testing of all types of plant machinery, as well as other types of fluid and mechanical systems. Mr. Marscher has background in various types of turbines (including hydraulic, steam, and gas), as well as various types of pumps, including centrifugal as well as positive displacement (e.g. reciprocating, gear, rotary, and screw).

Mr. Marscher's expert witnessing experience includes 27 cases over the course of his 50+ year career, for which he provided detailed engineering reports in support of the case. This legal support experience includes witnessing in front of tribunals four times, and testifying in Federal Court in four cases. He also has performed depositions 11 times. 

For the past 45 years, Mr. Marscher has been a voting member of the ASTM Fatigue Standards Committee E9, as well as the ASTM Wear & Erosion Standards Committee G2. He is also the past Board of Directors Chairman for the Machinery Failure Prevention Technology Society (MFPT), and has been active in the Vibration Institute. Mr. Marscher is a 23-year member of the Texas A&M Turbine-Pump Users Symposium Advisory Committee (essentially the Board of Directors for the Symposium). For ASME, he was Chair of the Predictive Maintenance committee and was Organizing and Presiding Chair of the 1993 RoCon Rotating Machinery Conference and the 1995 Tribology Conference.

Dr. Edward Bennett is MSI’s VP of Fluids Engineering.  Dr. Bennett graduated from the Naval Academy, following which he was a navy test pilot.  Later he received his PhD in Fluid Dynamics from Johns Hopkins University. Dr. Bennett has been a well-known leader in Fluid Dynamics and the Aero/hydrodynamic Design of Turbomachinery for the past thirty plus years.  

In 1995, Dr. Bennett founded ASC Turbo, a design house that combined the CFD software from Advanced Scientific Computing and specialized turbomachinery design software.  During this time, he worked on the development of BladeGen, a 3-dimensional turbomachinery blade geometry kernel, and also performed a key role design work that included the starter turbine and vapor cycle compressor for the F-22 Raptor fighter, several biomechanical cardiac pumps, a LOX rocket turbopump, as well as numerous more “conventional” turbomachinery designs. After this, he served as Director of Turbopumps for Gencorp Aerojet, and authored the hydraulic design methodology that is still in use by that organization.

At MSI, Dr. Bennett oversees fluid dynamic design and analysis of pumps, compressors, and turbines, including various sizes of hydroturbine generators.  This work includes detailed computational fluid dynamic (CFD) analysis, as well as test rig design, and flow loop/ wind tunnel validation testing.  Recently, he has supported major law firms with expert report writing and detailed two-phase flow unsteady CFD analysis of 100MW and 400 MW hydroturbines in the US and Canada.

Paul A. Boyadjis is Director of Rotating Machinery Analysis for MSI.  Mr. Boyadjis has a BS and MS in Mechanical Engineering from Lehigh University where he graduated summa cum laude.  He has over 35 years of diverse experience in the analysis and Design of Centrifugal Pumps and Pumping Systems, as well as Centrifugal Compressors. His specialty includes complex 3D solids modeling for stress and vibration analysis using advanced finite element techniques, and he has worked as a lead analytical engineer for major manufacturers. 

Mr. Boyadjis is also an expert at rotordynamics, and field testing. He has enjoyed participating as a Hydraulic Institute Standards Partner for over a decade, and became vice chair of its Vibration Committee, and was named Standards Partner of the Year in 2021.  Paul played a key role in various standards. 

Years ago, Mr. Mr. Boyadjis developed the solids modeling and advanced finite element analysis capabilities at the Government Marine Business unit of Ingersoll-Rand, and wrote many of the structural and vibration analysis procedures for that division. As mergers took place, he then transferred these analytical capabilities to the Research and Development group of Ingersoll-Dresser Pump and later Flowserve.

While with MSI, Mr. Boyadjis has conducted detailed 3D finite element analysis of failed casings and impellers, performing forensic investigations, and when necessary, providing successful design enhancements for industrial and municipal customers. He has directed or participated in many testing and troubleshooting projects, particularly for water and wastewater pumping systems.

View MSI's Consulting Profile.