David Calley is member of the CAFE Foundation Advisory Board, with a great deal of technical expertise to offer. His small wind turbine sold over 150,000 units. His patented design for the TrailerTail® increases fuel economy on semi-trucks and trailers by 5.4 percent at 65 miles per hour, according to SAE tests. Last year at EAS VIII, he showed the potential for small motors with incredible torque that could power Sky Taxis. At this year’s EAS IX he described, in depth, the type of motor design he has been developing to power things like his three-wheel electric/pedal-powered commuter vehicle and landing-gear wheels on Sky Taxis and even rocket fuel pumps. He asked the not-too-rhetorical questions, “How high can electric motor power go?” and “Where do these forces come from?” His answers took attendees on a high-level look at electromagnetic and permanent magnet (PM) materials theories. Electric motors rely on interactions between fields to produce power. “Fields” in this case are …
EAS VIII: High Torque, Efficiency and Powerful Motors
David Calley heads Planet Rider LLC, a design group working on a highly innovative three-wheel commuter vehicle that combines pedaling, electric power and aerodynamics to make for an exciting ride. Any resemblance between this machine and the average e-bike is like the difference between an early Rogallo wing and the Archaeopteryx. He has made a significant notch in fuel savings for big rig trucks with the angular extensions you see on tailgates of trailers cruising America’s highways. Fuel savings of five percent or more are a boon to fleet operators, thanks to Calley’s patented design, now manufactured by ATDynamics. He is also a member of the CAFE Foundation’s advisory board. Thus, it was informative to see his presentation at the eighth annual Electric Aircraft Symposium. His work on low-RPM motors using his simple transverse flux motor design enables excellent power and high torque from light-weight, compact motors. This fits the need to swing big, slow propellers for applications such as …