Technical description of the DDL-3 amphibious aircraft
Technical description of the DDL-3 amphibious aircraft
DDL-3 is a multipurpose flying amphibious boat.
The DDL-3 fuselage has a boat-shaped form and features:
The DDL-3 is equipped with two turboprop engines, each with a power of 800 hp, tandem-arranged in a profiled semicircular centersection. The front propeller is a pull propeller installed at the front of the centersection, while the rear propeller is a push propeller installed at the rear of the centersection. This layout increases the thrust of the air propellers from the start of motion due to the Coanda effect, reducing its takeoff speed. In addition, in case of engine failure, the DDL-3 will maintain controllability.
- Two transverse keels and hull sections with a flat transverse platform for landing on snow-ice surfaces, smoothly transitioning towards the keeled shape at the front
- Two sponsons in the form of gills with floats on the sides for lateral stability and additional lift
- Retractable tricycle landing gear with a front strut.
The high-mounted "umbrella" type wing has tandem trailing floating ailerons and flaps with a sliding hinge of the KAP type along the entire rear surface of the wing. The proposed wing mechanization design solutions allow for maintainability during landing and takeoff at low speeds of up to 70 km/h.
