Aviation Week Recognizes CAFE Foundation’s Efforts

Dean Sigler Diesel Powerplants, Electric Powerplants, GFC, Sustainable Aviation Leave a Comment

As noted in this blog. Dr. Brien Seeley, President of the CAFE Foundation, has been actively promoting the idea of a short to intermediate range Sky Taxi, a two-seat aerial vehicle that would carry its passengers safely from 420-foot runway “pocket airports” to other such runways at other urban and suburban settings, or even pockets situated within major airports.  The safety and utility promised by these electrically-powered aircraft would provide convenient, inexpensive trips for commuters who would enjoy TSA-free travel up to 500 miles at point-to-point speeds exceeding even private LearJets.

Aviation Week recently noted efforts by John Langford, CEO of UAV specialist Aurora Flight Sciences, to achieve part of Dr. Seeley’s far-reaching goals with today’s technology.  As Graham Warwick reports in the magazine, “Five years after DayJet’s on-demand air service using very light jets ceased operations, the dream of air taxis remains alive. But industry is looking at unmanned aircraft technology as a way to reduce or eliminate the pilot costs that contributed to DayJet’s demise.”

Centaur, a Davis DA-42 with autonomous aspirations

Centaur, a Diamond DA-42 with autonomous aspirations

Noting the up to 19 pilots required for each aircraft in normal commercial use, DayJet’s CEO John Langford reduced this to four or five per aircraft, but still needed two pilots in each of its three-passenger Eclipse 500s.

Aviation Week reports, “We need to get that down to around two pilots per aircraft,” [Langford] told the American Institute of Aeronautics and Astronautics (AIAA) Aviation 2013 conference in Los Angeles on August 14. “That’s where UAV technology comes in. We can go from two to one in the cockpit.”

Aurora Flight Sciences has developed its Centaur version of the Diamond DA42 light twin, which with autonomous flight capabilities, can cut crew costs in half, to around 15 percent of operating expenses, Langford claims.  He foresees a “Centaur II” in three to five years that would be capable of transporting cargo and/or passengers.  It could be fully autonomous for cargo delivery, or require only one pilot to carry passengers.

Langford envisions a “Centaur III” in seven to ten years “designed for personal transportation and certified to operate as an unmanned aircraft in national airspace carrying passengers. Centaur IIIs would be controlled from a network operations center.”

The reporter expands on this idea, with a bow to CAFE.  “In an even bolder vision, the Comparative Aircraft Flight Efficiency (CAFE) Foundation is proposing a five-year series of prize challenges that would lead to development of an autonomous Sky Taxi able to operate on demand from ‘pocket airparks’ inside communities.”

Referring to the 2011 Green Flight Challenge’s unqualified success, Warwick explains the proposed series of incremental challenges that would lead to the airplane’s of Dr. Seeley’s vision.

“The series of annual prize challenges would develop and demonstrate technology for a quiet, electrically powered, extreme short-take-off-and-landing (ESTOL) two-seat aircraft able to operate autonomously and safely on short flights from small airfields close to users.

“Beginning with competitions to develop electric wheel motors for taxiing and takeoff, and quiet propellers, the series would culminate in the demonstration of a quiet, autonomous ESTOL Sky Taxi, Seeley told the AIAA conference.

“The air taxi would fit within the weight and performance limits for a two-seat light sport aircraft, with a stall speed of less than 32 mph. and top speed above 120 mph. A high lift-to-drag ratio wing would extend glide performance to improve safety.

“Wheel motors would be used to increase acceleration and achieve a 90-ft. ground roll to a 45-mph. takeoff speed. Takeoff noise with a 600-lb.-thrust propeller would be less than 60 dBA, keeping any nuisance well within the 500 X 250-ft. perimeter of the airpark.”

Langford’s vision is much the same as CAFE’s but even his excellent Diamond aircraft will not take off and land in the confines of a pocket airpark, and even the relatively quiet turbo-diesel powerplants will exceed the noise requirements for neighborliness.


The Smartpilot navigation display window, also known as a synthetic vision system, shows terrain, weather, controlled airspace and surrounding traffic in one simple view. Radios, transponder and all other aircraft functions are accessed through easy to navigate touch screen menus

Another approach to personalized aviation comes from Stephane Fymat, who writes the newsletter for the Perlan Project and has founded Smartplane, Inc., a firm that would automate Light Sport Aircraft to make them safer to use and more intuitive to fly. Each SmartPlane flight would include flight planning with Smartflight, a Google Maps application, and Smartstar with weather services, and even a concierge service to meet the pilot’s needs at the chosen destination. The pilot would face a simplified Smartpilot display, showing the immediately necessary things for the pilot to know.  Fymat’s choices of available aircraft now are closer to CAFE’s vision, and may eventually come to match the pocket-sized concept.

All of these approaches are steps along the way, and all are welcome to make personal aviation a safer, more fulfilling experience.


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