Cessna is taking aim at its competitors with an all-new, globe-trotting, large-cabin corporate jet called the Hemisphere. The stand-up cabin, with a diameter of 8.5 feet—the widest in its class—will feature a flat floor with enough space to seat up to 18 passengers. The jet will have a range of about 5,200 miles—enough to fly nonstop from New York to Moscow or from San Francisco to Tokyo. And it will reach a top speed of about Mach 0.9 (650 mph). The new jet will join Cessna’s Longitude and Latitude to form a …