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9
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8. Curving
There are various techniques of curving which are applied for particular fly-
ing manoeuvres.
8.1 Curves with Maximum Speed - Spiral
You should apply only one steering line for reducing altitude. The outer side
of the curve is not braked. At first, the glider flies a wide curve with a big
radius and a relatively steep incline because of the high speed, which is why
it looses height. The more you pull the steering line, which causes trans-
verse incline and decreasing of height, the smaller the curve radius.
When turning a steep spiral you must control the ground clearance continu-
ously in order to bring it back to 150m in time for the safety reasons. You
should bring it back softly and avoid strong swinging and dynamic interrup-
tion of the flow.
8.2 Curves with 50% Brake
If you pull one of the steering lines, which you have already been pulling
approximately 50%, even deeper, the glider will make a narrower and flater
curve than from the full speed. This curving technique is especially appropri-
ate for thermic flying.
8.3 Curves with 75% Brake
If you pull one of the steering lines, which you have already been pulling
approximately 75%, even deeper, the glider reacts very fast, spirals flatly
and remains almost level due to the low speed. The steering feeling is soft.
The flow can be interrupted in gusts, so that it is safer to loosen the outside
steering line while pulling the steering line which is on the inside of the curve.
Warning:
Continuous extrem braking my cause a negative turn!
See 12.6.
8.4 Steering without controll lines
The controll lines fail to fulfil its function always when a defective knot unties
itself or when the steering line gets entangled because of the insufficient
preflight checking. In such a case you can steer well enough with the back
D-riser. Since this steering method can sooner bring to a interruption of the
flow, you should carry out no strong manoeuvres.
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