U-Turn AFS, Owner'S Manual

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Deep Stall
A Deep Stall is the result of too much pulling of the brake lines or
the rear risers, or a B-Stall that is recovered from too slowly.
The U2 has no tendency to Deep Stall. Usually it ceases a Deep Stall
without assistance, if you let up the brakes or the
rear risers.
In case of a Deep Stall, symmetrically "push" the A-risers "forward" on
both sides. Always check you have enough altitude if you try a Deep
Stall and never brake unevenly when you are in a Deep Stall.
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Behavior In Extreme Flying Conditions
Wingover
Front Tuck
Although FAT WILLIE is characterized by very high aerodynamic
stability, turbulence or pilot error can result in an extreme flight
condition. Proper behavior in extreme flight conditions is best
taught in SIV courses.
Every pilot who flys in turbulences or makes a mistake, can
find himself in these flying conditions.
All extreme manoeuvres and flight conditions that are described here
are dangerous if they are excecuted without adequate knowledge,
without enough altitude and / or without proper instruction.
Wrong excecution of the described manoeuvres and flight conditions
can risk your life. Never intend to fly extreme manoeuvres with a
passenger!
To do a wingover, the pilot flys S-turns with increasing roll, until
the desired roll is achieved. Wingover with U2 is usually only possible
with a very extreme roll.
CAUTION: It is prohibited to fly with a roll of more than 60 degrees.
A front tuck is the result of a negative angle of incidence (due to
turbulence or quickly released brakes). Usually U2 unfolds quickly and
without assistance. The recovery process can be supported by even
and symmetrical braking.