YASA’s Second Output Record This Year

Dean Sigler Announcements, Electric Powerplants, Sustainable Aviation 2 Comments

Mercedes-Benz, with its YASA (Yokeless and Segmented Armature) motor, has achieved a second world record this year for power density.  Pulling 1,000 horsepower from a 12 kilogram (xx pound) motor seems a bit incredible, but Mercedes has dynomometer tests to prove it. This efffort will be in production cars within a year, according to Mercedes, and the aircraft version, produced by a division called Evolito, will probably follow shortly thereafter. Even while under development at Oxford University, the motor showed great promise, as well as great torque.   This blog included the video below in 2010, with a Lotus 7 copy being flung about handily with two 40 kilowatt (53.6 horsepower) YASAs driving the rear wheels.  At that time, power was limited to 75 kilowatts (100.5 hp.), although designers believed 150 kW (201 hp.) was possible.   That early motor weighed 11 kilograms, or 23.2 pounds, one pound per three limited horsepower, one pound per six horsepower at the design limit.  As …

Klaus Ohlmann, Jonas Lay and eGenius go 2003 kilometers

Dean Sigler Announcements, Electric Powerplants, Hybrid Aircraft, hydrogen, Hydrogen Fuel, Sustainable Aviation Leave a Comment

Klaus Ohlmann and Jonas Lay in the one-and-only eGenius just completed a 2,003 kilometer (1,244 mile) trip from Germany to the Atlantic Ocean on the southern tip of France and return.  The numbers are spectacular.  The flight averaged 190.36 kilometers per hour (118.28 mph) and its hybrid power system consumed a mere 81 liters of fuel.  That works out to 24.72 kilometers per liter or 58.15 mpg.  Even a Prius at that speed would guzzle gasoline. Hybridizing eGenius eGenius was to have originally been HydroGenius, flying on gaseous hydrogen.  Starting design in 2006 and as presented at the 2009 Electric Aircraft Symposium, HydroGenius was designed by Rudolf Voit-Nitschman, Len Schumann, and Steffen Geinitz of the IFB, Institute of Aircraft Design at the University of Stuttgart.  Because Mercedes-Benz did not have their fuel cell available, the designers turned to pure battery power and the airplane became eGenius. The craft won second place in the NASA Green Flight Challenge sponsored by Google …