The MD-12 is a Polish four-engined short-range passenger and civil utility aircraft of the 1960s, which remained in the prototype stage.

The aircraft was development as a successor to the Lisunov Li-2 on short domestic routes for LOT Polish Airlines.

[2] The plane underwent state trials in 1961, and the second prototype was evaluated by LOT Airlines in August–September 1961.

The passenger variant was evaluated as quite successful, being easier to fly, than the Ilyushin Il-14 and more economical, but it was not produced because LOT found it unprofitable to order special planes for domestic routes.

The aerial photography variant was successful and countries, like the USSR, Hungary, Romania and Pakistan were interested in it, but its development was abandoned after a crash of the first MD-12 prototype on 17 September 1963 near Grójec.

[1] The plane crashed due to flutter of tail control surfaces and a crew of 5 were killed.

[1] The prototype MD-12P (SP-PBD) was evaluated by the LOT Polish Airlines in August–September 1961, on Warsaw-Rzeszów route, carrying over 1700 passengers.

Two-blade wooden propellers WR-1A of a variable pitch, 2.2 m diameter (powerplants were adapted from the TS-8 Bies trainer).