CAFE Foundation Banner
Home Electric Aircraft Green Flight Challenge RESEARCH & PUBLICATIONS ABOUT CAFE

  The CAFE Board

Front row, L-R, Alan Soule, Larry Ford, Brien Seeley, John Palmerlee, Wayne Cook
Back Row, L-R, Mike Fenn, Steve Williams, Jo Dempsey, Bruno Mombrinie

The CAFE Foundation Board


Stephen P. Williams, Vice-President

Ever since he was young, Steve has been interested in science. In high school he studied electronics and helped build and run the school's television studio. At College of Marin he studied engineering and worked in the computer center. In his spare time he started computing “pi” into the thousands of decimal places, and he memorized “pi” to the first fifty digits. Steve studied computer science at Cal Poly in San Luis Obispo where he developed a talent for programming as he continued to compute “pi.”

At National Controls Steve worked as an engineer designing electronic scales. One of his designs was capable of resolving a weight to one part in a million. This experience proved useful years later in the design of the Barograph that Steve built for Rutan’s Voyager World Flight. After two major design improvements and successful testing in the NASA Ames Research wind tunnel, the Barograph became the highly sensitive instrument CAFE still uses for flight testing and research.

At Hewlett Packard Steve worked as an engineer developing a number of electronic instrument and system designs, including a large spectrum monitoring system. Steve was a principal designer of HP’s MSIB bus which allows instruments to communicate with each other. And Steve continued to compute “pi”. In fact it was at HP that he achieved one million decimal places for “pi.” Steve finally decided that was enough!

Steve has developed the formulas which are the basis for the mathematical design and analysis done by CAFE. In 1993 he developed the formula used to score the CAFE Triaviathon. He continues to develop all the software and hardware CAFE uses for research and analysis.

Back to top


Johanna M Bumgarner, Treasurer

Jo became captivated by the sound of big radial engines in flight at an early age as a United Air Lines brat. She began attending Reno Air Races in 1980 where the sights and sounds compelled her to seek her own niche in the aviation world. Earning her pilot certificates from private through commercial multi-engine and on to instrument flight instructor, Jo flew professionally as a flight instructor for many years. Along the way she purchased, restored and flew a North American T-28C with the help of the Pacific Coast Air Museum (PCAM). For years Jo produced PCAM’s newsletter.

Jo received her bachelor’s degree in geology with an emphasis in cartography and remote sensing for California State University, East Bay. She completed graduate work in geology at San Jose State University, and she received her teaching credentials in physical science, math, and geography at Sonoma State University.

As a member of the local EAA Chapter 124, Jo served on the Board of Directors and edited their newsletter. Here she met and flew with CAFE board members and was asked to join their ranks in 1997.

The enthusiasm, creativity, innovation and synergy that encompass CAFE continue to be a delight to Jo. She carries this energy into the classroom where she has taught aeronautics at Santa Rosa Junior College and where she currently teaches high school physical science and math. And although Jo does not race, she photographed the Reno Air Races from pylon 6 for many years.

Back to top



John Palmerlee, Secretary

On July 2, 1972 John and his cousin Hart took their first flight in a small plane from a dirt airstrip on their family ranch near Oroville, California. The Wren 460 was a STOL modified Cessna 182, with controllable canards on the cowl and steerable stall fences on the wings – a real performer in its day. This eye- popper kicked off John’s love of aviation with a twist for short field performance.

Intending to own his own airplane on a budget, John completed the Aviation Maintenance program at Sacramento City College and bought a Cessna 170A with a small inheritance. The A&P license paid off while he earned his Commercial license and instrument rating. The 170 proved itself in the “bush” during July 1980 by carrying salmon off Alaskan beaches. He earned enough for the trip, and returned with a profound respect for pilots flying in the far North.

A passion for “How things work” brought John to Sonoma State University, where he earned a B.S. in Applied Physics. His senior project was building a scale model noise barrier and source to verify traffic noise attenuation formulae. Following graduation, he worked in research and development for Sound Solutions Acoustical Consulting Services in Santa Rosa, California.

John has been programming computers and tinkering with electronics since High School, and is currently a senior software engineer with the Workhorse Group, a product tracking software provider. He belongs to the local EAA Chapter 124, where he serves as webmaster and newsletter editor.

Clean, green, electric transportation found a place in John’s home when he and his Daughter Ellen converted a pickup to run on pure electric as her high school senior project. After attending two of CAFE’s Electric Aircraft Symposiums and volunteering at the 2011 Green Flight Challenge, the circuit was complete and John joined the CAFE Board to support their timely move to green, efficient flight.

Back to top


Mike Fenn, Director

Mike was drawn to aviation like a moth to a flame. When he was 7 years old he watched his dad land a U.S. Army Beechcraft. He knew then that he would learn to fly and be involved with airplanes for the rest of his life. He has always loved the smooth shapes and the sounds of airplanes.

Mike earned his private pilot certificate in 1983. He later found a 1949 Temco Swift in need of some tender loving care. Employing his skills as a machinist, he fabricated and assembled the pieces necessary to return the Swift to the air and enjoyed many happy hours flying.

For more than 20 years, Mike has participated at EAA Chapter 124 and served on its Board of Directors. He has designed and fabricated furnishings and accessories for the EAA chapter auditorium. Mike is also an active member of the Pacific Coast Air Museum. In the 1980s Mike was a regular volunteer at the CAFE 400 Races.

Mike employs his skills in drafting, machine work and mechanical design. He has developed specialized parts ranging from micro electronic components to large aircraft parts. Able to build almost anything, Mike enjoys the challenge of taking on new, innovative design projects.

Back to top



Bruno Mombrinie, Director

While Bruno graduated with a degree in Mechanical Engineering from MIT, most of his time was spent in the AeroAstro Department. As a freshman, he helped build the Chrysalis human powered airplane. Later that summer he got to fly the plane several times. “The feeling of being so, so high (39ft) fly under my own power was beyond…I just wanted to burst…actually I was so out of breath from the effort, I could hardly mouth 'yippee!'”

In 1984, Bruno founded AVEC Scientific Design, which specializes in a line of disposables for operating rooms. He is also CEO of an investment group, Haleys Pump Company, which is developing a medical device for children with spinal cord injuries. It is awaiting FDA approval.

Bruno has always been fascinated in the design and realization of cutting edge technology projects. In 2002 he developed the Negative Mass two piece crankset, the worlds' lightest and stiffest bicycle crankset. In 2005, he was a member of the Lisa Vetterlein Team, setting the woman’s human powered vehicle land speed record of 66.65 mph.

Bruno holds several patents and is always involved in some new project. Each summer, AVEC sponsors high school interns to tackle a project. The latest challenge is to develop a windmill-powered vehicle to break the sailing speed records on both land and sea.

Bruno is a member of the Sonoma County Woodworkers Association. He enjoys participating in the annual Bodega Bay Wooden Boat Challenge. He also enjoys vacations in the south of France and exploring tropical islands. He also won’t say no to a day of skiing, sailing, white water rafting or kicking back to watch a good movie.

Back to top



Alan M. Soule, Director

With a bachelor’s degree in mechanical engineering from the University of California at Santa Barbara, Alan has always been fascinated with flight and alternatively powered vehicles. Trying to get as close to human flight as possible, Alan took hang gliding lessons in the 1970’s. The most unforgettable flight was the first one when his feet left the ground, totally oblivious to being strapped into the kite.

Also, in the 70’s, Alan began driving alternative powered vehicles, starting with a propane powered Mercury Capri. The next step was to lease an EV1 until GM discontinued the program. When GM wanted it back, Alan refused to turn it in and when GM came to get it they had to pry it out of his hands. When Tesla started taking orders in 2006 Alan signed up and took delivery in 2008.

With a passion for electric vehicles, Alan is a director for the North Bay EAA (Electric Auto Association) and give talks promoting electric vehicles. Having learned that electric aircraft are also in development, Alan didn’t think twice about contributing what he can to help that effort.

Alan has been a commercial contractor in Sonoma County for 30 years. Specializing in custom pre-engineered, pre-fabricated steel structures, his company specializes in winery buildings. Alan has served as president of the Systems Builders Association and the Redwood Empire Chapter of the Construction Specifications Institute.

Back to top






Home Electric Aircraft Green Flight Challenge Research & Publications About CAFE
Copyright © 2016 CAFE Foundation