Personal Experience Summary of


Detailed Experience Summary at Pratt & Whitney Aircraft GPD

Pratt & Whitney Aircraft GPD (Government Products Division) was the R&D center for the development of large gas turbine engines for use in military aircraft. Ted was hired on 15 June 1977 as a Design Engineer in the Heat Transfer Group. He transferred to the Bearings and Lubrication Group in 1979 and was promoted to Senior Design Engineer in 1982.

Ted's first assignment was to complete a transient thermal analysis of the turbine disks for the FT4C-3F gas turbine engine, a ground based flight engine used to generate electrical power by utilities during times of peak energy consumption. Ted learned to use PWA's thermal analysis computer programs: C.H.A.O.S. and E.P.I.T.A.P.H. to satisfy the requirements for this project. Over the two years that Ted worked in the Heat Transfer department, he made dozens of models of gas turbine engine components including static and rotating parts in the compressor and turbine, turbine exhaust ducts, bearing compartments, and more. Ted also conducted compressible and incompressible fluid flow analyses and wrote a computer program to determine the flow rate and pressure distribution of hot air that circulated between the rotating disks and the stationary stators. This was of immense value to the thermal modeling group. Ted was also awarded several cost reduction awards for saving PWA large sums of money. One of the cost reduction awards was for modifying the C.H.A.O.S. finite difference computer code to significantly reduce the time it took to complete a thermal analysis. This suggestion was implemented and it became so successful that the number of employees in the thermal analysis group was cut in half. Ted was transferred to the Bearings and Lubrication Group.

Ted learned Rolling Element Bearing Design and Analysis skills from the best Engineers available in the industry at the time. He learned how to optimize ball and cylindrical rolling element bearing designs under extreme conditions using a large number of analytical tools. This included an array of quasi-static bearing analysis computer programs written by A.B.Jones and SHABERTH, written by SKF. Other internally written computer codes were useful for fit-up, flexible rings, Weibull life prediction and ball skid control. The majority of Ted's assignments involved the redesign of rolling element bearings in engines that experienced operational problems. Ted's job was to find out why and redesign the bearings to make them work. Ted worked on almost every bearing in the J52, F100, TF30, FT4 and their derivatives as well as on the development of bearings for new advanced engine programs.

One major project involved the construction of a massive computer program (20 Engineers & programmers took part in this project) for the FT4 Engine program. The goal of the program was to allow an operator to input operating conditions for the engine and have an array of comprehensive engine performance data output. Ted's role in this project was to help set up computer code to predict temperatures in the bearing compartment, stresses, lives and other operating concerns for all of the rolling element bearings in the engine. Ted was promoted to Senior Design Engineer for his contribution to this program.

Ted left PWA on 17 June 1982 to start a career at Teledyne CAE.