The Limbach L550E is a German aircraft engine, designed and produced by Limbach Flugmotoren of Königswinter.

[2] The L550E is an air-cooled horizontally-opposed 550cc four-cylinder two-stroke petrol engine developing 37 kW (50 hp) at 7500 rpm which can drive a propeller either directly or geared.

[1][2][3] Since at least 2014, the Iranian firm Mado has marketed a copy of the L550E, called MD550.

[4] The Mado variant is used for the Iranian Shahed-136 UAV.

[6] Data from World Directory of Leisure Aviation 2011-12 and manufacturer[2][3] Related lists