What's a Lomcovak?
Czech pilots first amazed Western pilots with this aerobatic manoeuvre in the 1950s. Popular mythology holds that the name comes from a Slovak slang expression for a stiff drink, which is what most people need after they've done one. In fact, the word means something like 'ultra-violent shaker'*, though the English language is somewhat inadequate here.
The other popular translation of the term is "I have drunk too much plum brandy and my gyros have toppled". The Czechs themselves described the lomcovak as "A rapid negative roll executed in that direction towards which the torque of the propeller is helping in rotation"**.
What it looks like to anyone on the ground is a twisting gyration. In a 'main' or 'cap' lomcovak, the aircraft tumbles out of a vertical climb, twisting at the highest point, rotating about its lateral axis. In 'conic' lomcovaks, the fuselage traces a cone shape, with either the nose (in the case of a positive conic) or the tail (in a negative conic) being at the tip of the cone. These figures are normally completed with a stall turn or tail slide.
So what's an outside lomcovak? No such thing...
* Source: Email from Ladislav Bashtarz - many thanks.
** Source: 'Aerobatics' by Neil Williams (Airlife) - available via 
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