S předchozím příspěvkem souhlasím jen částečně. Nevím, jak je to u bodování modelů, ale u bodování skutečných letadel bodovače musí zajímat, jak je letadlo do autorotace uvedeno. Pro uvedení do autorotace musí být použita jen a pouze směrovka. (Samozřejmě až po natažení, nebo potlačení).
přikládám výňatek z pravidel FAI pro bodování akrobacie větroňů:
6.9.25. Family 9.9 – Positive Flick Rolls
6.9.25.1. Flick rolls represent one of the greatest challenges to judges. This is largely due to two
factors: (1) the "flicking" characteristics of different types of gliders vary because of
variations in wing section, wing span and wing planform; and (2), in properly executed
flick rolls changes of attitude occur very quickly. Judges must watch particularly carefully
to determine the exact order in which events occur, especially at the beginning of the
flick.
6.9.25.2. The judge must see two things to determine that a flick roll has been correctly initiated.
The aircraft must achieve an angle of attack close to critical, usually involving a rapid
change of pitch attitude, and
autorotation must be initiated by application of the rudder. If
the judge does not observe both events, the figure must be given a PZ. The size of the
pitch change may vary considerably due to the requirements of the figure in which the
flick is performed. When, for instance, a flick roll is initiated at the top of a loop, the
aircraft can be expected already to be carrying quite a high angle of attack and the
amount of pitch change that is required may be much less than in other circumstances.
6.9.25.3. At the start of a positive flick roll, the pitch attitude must change in the 'nose up' sense,
from the pilot's perspective, clearly and unambiguously (Figure 42). This puts the
aircraft's wings near the critical angle-of-attack and can best be seen by carefully
watching either the nose or tail of the glider. If the fuselage pitches in the wrong
direction, a hard zero (HZ) is given. When, or shortly after, the fuselage pitches the glider
must be seen to yaw, initiating a stall of one wing and the rapid onset of autorotation. If
the judge observes any movement about the roll axis before the autorotation starts, the
figure must be downgraded one (1) point per five (5) degrees of roll.
6.9.25.4.
Throughout the flick, the roll must be driven primarily by the rudder and autorotation
must be seen to continue. This can best be confirmed by the observed conical motion of
the fuselage longitudinal axis, with the most obvious displacement at the tail, which is
furthest from the CofG. This should not be confused with the spiral motion of a tight
barrel roll, wherein the centre of gravity of the glider more noticeably follows a spiral
flight path. The rate of rotation and the angle, relative to the flight path, of the conical
fuselage rotation may vary between glider types, but the rate of rotation is always
considerably faster than when rolled by ailerons. This is an essential clue for the judge to
determine that the glider has indeed been flicked.For all aircraft types, the criteria for
stopping the flick roll are the same: autorotation must stop as quickly as it started, after
the desired extent of roll, followed immediately by the adoption of the attitude that
Sporting Code, Section 6
Part 2 - Glider Aircraft Version 2015-3
Celá pravidla jsou k dispozici zde:
http://www.fai.org/downloads/civa/SC6_Part2Popis prvku od reprezentanta ČR v akro na kluzácích je tady:
https://www.youtube.com/watch?v=6Z7qbfVZoB4