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Перевод:
yaw
[существительное]
отклонение от направления движения; рыскание;
[глагол]
отклоняться от курса
Тезаурус:
If an aircraft is very directionally stable because of a large fin, then the rudder will be less able to produce a large angle of
yaw
before this balance of forces occurs.
Provided the approach path was correct beforehand, the adverse
yaw
as the aileron is applied swings the nose off to just about the right point to keep the glider on the correct path.
Any time that a wing begins to drop at a stall it is the beginning of a possible spin, but the spin can only develop if the wing is kept stalled and the glider is allowed to continue to
yaw
.
Additional
yaw
will also occur if the ailerons are used to try to stop the dropping wing because of the extra aileron drag.
With a smaller fin, the directional stability will be weaker, the rudder will be more effective and the angle of
yaw
will be far greater.
Probably the most effective way of dealing with an incipient spin in practice is to move forwards on the stick, apply the opposite rudder to check the
yaw
and then to use all the controls normally to bring the aircraft level.
Applying the opposite rudder will tend to reduce the
yaw
and so help even out the stalling of the wings.
How far the glider rolls over into the beginning of the spin depends to a large extent on the amount of
yaw
present.
Start to circle in a normal turn with about 20 of bank, keeping the
yaw
string exactly in the middle while you reduce speed very gradually.
Perhaps in an effort to justify this simplification, some instructors have been warning against the use of the rudder to stop the
yaw
if a wing drops at the stall.
You should be able to go into turns and make centring movements without having to refer to the slip ball,
yaw
string, or ASI.
(The full opposite rudder must never be taken off if the aircraft is reluctant to recover, because any additional
yaw
would further flatten the spin.)
The ideal, of course, is the accurate turn with the
yaw
string central or, as some pilots say, showing a very slight slipping movement (because the cockpit is ahead of the c.g.).
LMBomber
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