Flying With A Wet Paraglider; Winching - Advance acoustic IOTA 23 User Manual

Flying with a wet paraglider

Flying with a wet glider creates a risk of deep stall . Deep stall is of-
ten the result of a combination of factors . The weight of the wet can-
opy goes up, and this increased weight increases the angle of attack,
which always puts the glider nearer the deep stall limit . Added to this,
water drops on the top surface have a detrimental effect on the laminar
flow of the boundary layer near the leading edge, which distinctly re-
duces the maximum lift coefficient . If the wet glider is also being flown
at its lower weight limit there is a further small effect of increasing the
angle of attack, as well as there being a lower airspeed because of the
reduced wing loading .
In order to avoid the risk of deep stall with a wet glider the wing should
be braked as little as possible, and big ears not used at all . As a further
preventative measure apply moderate ( 25-40% ) speed bar . All these
actions have a small effect in reducing the angle of attack .
Should the wet glider get into deep stall, recovery can only be
achieved using the speed bar . See also section «Deep stall» .

Winching

The I OTA is suitable for winch launching . When taking off in windless
conditions, ensure that the paraglider is laid out in an arched or even
wedge shape ( to avoid risk of the glider rosetting ):
Winch launch is only permitted if:
§ the pilot has completed a tow training course
( only Germany/ DHV );
§ the winch system is certified for use with paragliders;
§ the winch operator has been fully trained in paraglider winching .
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