H3X – A Motor with High Power Density

Dean Sigler Batteries, Electric Powerplants, Sky Taxis, Sustainable Aviation Leave a Comment

H3X, a motor company started by three University of Madison, Wisconsin graduates, promotes its integrated motor/inverter power plant as “the next step in the evolution of electric propulsion technology.”  With Their HPDM-250’s 13-kilowatt-per-kilogram continuous power ability, it meets ARPA-E’s (Advanced Research Projects Agency–Energy’s) criteria for powering large, 737-type aircraft. Electronics Weekly reports, “ARPA-E has determined that for a Boeing 737 to complete a typical five hour flight, the propulsion system must be >12 kW/kg continuous.”  H3X adds, “These specifications are estimates based on electromagnetic thermal and structural simulations. Data from dynamometer will be available Q2 2021.” Their motor is roughly twice as power dense as MagniX motors of similar power, according to H3X. Weight reduction is an intrinsic part of …

Rechargeable Alkaline Batteries Seem Inherently Safe

Dean Sigler Batteries, Sustainable Aviation Leave a Comment

Ionic Materials, A Woburn, Massachusetts-based company, claims to have crafted a battery with an alkaline solid-state electrolyte that successfully resists punctures, cuts and other injuries.  It doesn’t burst into flames like many lithium-based batteries.  In demonstrations, the battery survives 9mm and 25-caliber bullets. A more personal attack takes place with a screwdriver and paper cutter. When a “conventional” lithium battery suffers such assaults, the liquid electrolyte leaks and sometimes causes a short circuit, channeling all the energy into the flammable liquid.  Remember recent hoverboard and airline incidents and a spate of smart phone meltdowns to make you more than a little nervous about the cell phone in your pocket or tablet nearby.  Such thermal runaways on a small airplane are …