Fairchild Dornier Metro Merlin IV

The Swearingen Merlin, now recognized as the Fairchild Aerospace Merlin, is a pressurized business aircraft introduced in the late 1960s. It was initially manufactured by Swearingen Aircraft, later transitioning to Fairchild Aircraft. The genesis of this aircraft can be traced back to Ed Swearingen’s gradual modification of a Beechcraft Twin Bonanza and Queen Air, resulting in a new design known as the Excalibur. Subsequently, he embarked on the development of a new aircraft, incorporating a clean-sheet fuselage with modified horizontal tails and a wet wing derived from the Queen Air, along with the landing gear of the Twin Bonanza. This innovation gave rise to the pressurized SA26 Merlin. The SA226-AT Merlin IV, evolved from a previous variant, the Metro, positioned itself as a corporate business aircraft accommodating up to 21 passengers. It was powered by Honeywell TPE331-3U-303G engines.

Red Box is delighted to present a comprehensive range of ground power equipment for this aircraft, including tugs, ground power units, start power units and more, perfectly tailored to the requirements of the Fairchild Merlin IV aircraft.

This offering includes the 747C tug, and the RBSC300 continuous power unit—ideal for diagnostic work, pre-flight checks, or continuously powering equipment during operations without depleting the onboard aircraft batteries. Additionally, the Twin RB75A is available for starting the aircraft, aiding in the prevention of hot starts. Our TC3000 range further provides a combination of start and continuous power in a single unit specifically designed for the Fairchild Merlin IV aircraft.


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