A Lomcovák is an aerobatic maneuver that can be performed by an aeroplane. The word originates from the Slovak aerobatic pilot Ladislav Bezák's mechanic, who at a 1958 air show in Brno, Czechoslovakia jokingly called Bezák's tumble maneuvers "Lomcovaks" when asked by journalists what they were. According to Miroslav A. Liškutín, a Czechoslovak fighter pilot, veteran of the RAF (Personal No.: 787 424/158 235), this maneuver was flown by himself and other pilots on Bücker Bü 131 Jungmann/Aero C-4 biplanes at early post-WWII period air shows around Czechoslovakia and it was called "talířek" (small saucer) due to the horizontal rotary movement of the aircraft.
"Lomcovak" translated into English, roughly means "cause of a headache" or "hangover". The expression "Lomcovak" originated from the Moravia region, famous for its Jelinek slivovitz, a traditional Czechoslovakian alcohol, and is commonly used to describe the rotating motions of one who has had one too many.
The Lomcovak is a freestyle family of maneuvers performed at airshows or in four minute frees. It is not in the Aresti catalogue and therefore may not be flown in competition.
The maneuver consists of tumbling the airplane through the pitch axis (end to end) while it travels in a lateral direction (wingtip to wingtip).
Flying a Lomcovak (Lomcevak) will vary in technique from aeroplane to aeroplane and pilot to pilot. This is probably the most common technique described for a clockwise rotating engine.
This is generally the same technique used for a knife edge spin (up or down).