"A trainer is a class of aircraft designed specifically to facilitate flight training of pilots and aircrews. The use of a dedicated trainer aircraft with additional ...
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safety features—such as tandem flight controls, forgiving flight characteristics and a simplified cockpit arrangement—allows pilots-in-training to safely advance their real-time piloting, navigation and warfighting skills without the danger of overextending their abilities alone in a fully featured aircraft.[citation needed]
Civilian pilots are normally trained in a light aircraft, with two or more seats to allow for a student and instructor. The aircraft may be modified to withstand the flight conditions imposed by training flights." - (en.wikipedia.org 29.02.2020)