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Expert. Expert worked for 34 years in the engineering design, development, testing and manufacturing of propulsion systems for satellites. He has expertise in chemical propulsion, solid propellant propulsion and ion propulsion. He was Chief Propulsion Technologist for Hughes Electronics at retirement having worked his way up from Project Engineer on many new propulsion system designs for spin stabilized and 3-axis stabilized spacecraft. He was responsible for the integration and development of solid propellant rockets used as apogee kick motors for satellites as well as the integration and development of the propulsion attitude control systems for these same satellites. His expertise spans the evolution of rocket propulsion development starting with monopropellant designs to bipropellant designs to ion propulsion designs. He has knowledge and expertise in the implementation and problem solving for all of these new and innovative propulsion systems.

Expert. Expert has expertise in the design and implementation of fluid systems for both spin stabilized and 3-axis stabilized designs. He has knowledge and expertise in liquid propellant applications in gravitational and zero gravity environments. He was instrumental in the design of a zero gravity propellant tank design using etched metal disks as flow control devices for propellants. He has participated in many reviews for the physics of liquid behavior in space and has been provided technical insight for many failure review boards showing how liquids perform in propulsions designs. His expertise has been used to provide expert witness testimony for propulsion system designs in several legal cases.

Expert planned and developed the initial manufacturing and testing facilities for ion engine programs at Hughes Electronics. He was responsible for the planning and implementation of the first production product line manufacturing and flight testing of ion engines for Hughes Electronice communication satellites as well as for NASA satellite programs. The ion engine program consisted of three design sizes (13 cm, 25 cm and 30cm engines). All engines have flight experience on Hughes and NASA satellites.

The design of satellites requires the implementation of contractor requirements into working designs and implementing these designs using hardware specifically suited to meet the requirement. Expert. Expert's entire career has been to provide conceptual design support for propulsion systems to meet customer requirements He provided inputs to pre-proposals, proposals, and contracted programs and followed those designs from initial concept to orbital flight support. He made presentations showing how propulsion systems would satisfy contractual requirements and made presentations showing how the propulsion design would operate at the end of its operational lifetime. The propulsion designs produced by Expert have been implemented on INTELSAT programs, direct broadcast programs, televison broadcast satellite programs as well as NASA and other government programs.. He has a thorough understanding how to meet or exceed customer expectations.

Expert. Expert has also represented customers of satellite programs to assure all requirements of the programs are satisfied. He has worked as a consultant for numerous customers including ASIASAT, XM satellite, INTELSAT, and Boeing to name a few.

He evaluated the zero "g" characteristics of a liquid and the interaction of the liquid within a propellant management device. He was able to show that the management device would not always provide a defined liquid/gas interface for certain liquid fill fractions of the tank. This analysis then allowed the attitude control organization to define operational limitations for the satellites and a set of operational rules to be implemented for these fill fractions. This information was provided to the customer and the supplier for implementation.Expert. Expert was able to analyze a failure scenario which showed that a tank failure would not be a simple gas leak path thru the tank membrane. He was able to develop a flow model which showed the leak path must be partially blocked with liquid and was able to model the flow pressure drop over time and compared this model to actual tank pressure data.Expert. Expert provided insight to a design review which showed that the review conclusions were not as simple as presented. He showed the presenter that a different scenario would also describe the data results and would lead to a potential castastropic failure if not corrected. The potential failure mode required a rework of a portion of the propulsion plumbing before re-launch. As a result the customer was compelled to return the spacecraft to the preparation area for rework before a re-launch was attempted.