The Krasniye Kryl'ya Deltacraft MD-40 () is a Russian ultralight trike, designed and produced by Krasniye Kryl'ya of Taganrog. The aircraft is supplied as a complete ready-to-fly-aircraft.
The Deltacraft MD-40 was designed to comply with the Fédération Aéronautique Internationale microlight category, including the category's maximum gross weight of . The aircraft has a maximum gross weight of . It features a cable-braced hang glider-style high-wing, weight-shift controls, a single seat open cockpit with a streamlined cockpit fairing, retractable tricycle landing gear and a single engine in pusher configuration.
The aircraft fuselage is made from composites, with its aluminum-framed double surface wing covered in Dacron sailcloth. The wing is supported by a single tube-type kingpost and uses an "A" frame weight-shift control bar. The powerplant is a twin cylinder, air-cooled, two-stroke, dual-ignition Rotax 503 engine. The MD-40 has an empty weight of and a gross weight of , giving a useful load of . With full fuel of the payload is .
A number of different wings can be fitted to the basic carriage, including a wing with an area of produced by the company.