Grob Aerospace plans to en-hance its reputation for build-ing high-altitude surveillance aircraft with the introduction of a long-endurance jet that could operate either manned or as a UAV. The high-altitude system, called the Grob G600, is being designed for 65,000-ft. operations and a range of 5,400 naut. mi. An extended-range model, fitted with four 1,000-liter auxiliary fuel tanks carried in the aircraft cabin, is also planned. It could have a range of 11,340 naut. mi. and endurance of 33 hr. The vehicle is being envisioned as either a research aircraft or, for military operations, as a surveillance system or communications relay. High-altitude refueling is also being discussed.
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