With a range of 9,000 miles, roughly the distance from New York to Hong Kong, the Bombardier Global 8,000 flies farther than any other private jet—1,000 miles more than its closest competitor. General Electric developed engines for the craft that use carbon-fiber casing and other weight-saving tricks to improve efficiency by 8 percent over previous designs. The plane’s design includes a thinner, lighter swept-wing and cuts fuel use by another 6 percent.