ZeroAvia, maker of hydrogen-Electric powerplants for zero-emission aviation, has been selected to partner with Natilus, “a leading innovator in designing and developing new autonomous blended-wing-body (BWB) cargo aircraft.” Kona, smallest of the pack, will carry a 3.8-ton (7,600-pound), while Natilus’ web site shows three additional BWBs, jumping to 60, 100, and 130 tons cargo-carrying capacity and maximum takeoff weights of up to nearly a million pounds. For a fact sheet on all the designs, click here. As an option to conventional turboprops, two ZeroAvia’s ZA600s producing 600 kilowatts (804 horsepower) each will power Kona, with its 26-meter (85-foot) wingspan capable of carrying its load 900 nautical miles (1,667 kilometers) at a cruising speed of 220 knots (407 kilometers) per hour. Natilus claims its range of BWB’s will 60-percent more cargo volume than traditional aircraft for the same weight giving 60-percent lower total cost of operations and 50-percent lower CO2 emissions. In terms of operating costs, Natilus’ largest craft come in …