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Designed in 1939 by Pyotr Grushin of the Moscow Aviation Institute (MAI, hence the designation), it was delayed by problems with the new Klimov M-105 engine and eventually only a single prototype was built.
Designed by Peter Grushin at the Moscow Aviation Institute (hence the MAI designation), the aeroplane featured an unusual tandem wing, with the tail planes as large as 45% of the wing area.