Learjet 28

The Learjet 28 is an American twin-engine business jet seating eight to ten, with two crew and six to eight passengers, intended as the successor to the Learjet 25. The Learjet 29 is identical except for a long-range fuel tank, which cut its capacity to six. Both were marketed under the Longhorn name. They were based on the Learjet 25 but received a completely new wing with winglets, designed for the Learjet 55, and were the first production jets to use winglets. The first flight took place on 24 August 1977, and FAA certification for both models was awarded on 30 January 1979. The wingtip tanks of the earlier model had to be deleted to fit the winglets, so range fell compared with the Learjet 31, and only five Learjet 28s and four Learjet 29s were built before production ceased in August 1982. The first production aircraft was used by Neil Armstrong to set five aerospace records.