Table of Contents
Advertisement
Collapses
Asymmetric collapse of the wing
The ALPHA 7 has a very stiff and stable canopy . With an active flying
technique collapses can be almost completely prevented in normal
flying conditions .
If the glider does, however, suffer a side collapse at trim speed, it will
respond to a collapse of more than 50% of the whole wing with moder-
ate turning, allowing heading to be easily held with light counter-steer-
ing . Normally, the wing will reopen without pilot action .
Due to higher aerodynamic forces during accelerated flight the glider
will respond to a side collapse with more energy . But the turning ten-
dency in fully accelerated flight is unspectacular and slow .
If a collapse is slow to reopen, a deep, fast but brief pull on the folded
side brake will help . Here it is important to completely release the brake
again to let the glider keep its flying speed . Be careful with the brake
on the open side, and only apply enough to keep straight – so as not to
stall the wing . This side is providing the lift necessary to keep the glider
flying under control .
Poorly flown wingovers can cause a wingtip to fold inwards from the
side, causing it to catch in the lines and create a cravat . Due to the
high drag they produce cravats can lead to strong turning ( spiralling ) .
Prevent this from developing by using just enough (but no more) out-
side brake . Then open the cravated wingtip by pulling the orange sta-
bilo line . Clearing a cravat can be also done more quickly by 'pumping' .
Apply 75% of brake on the affected side within a maximum of two sec-
onds, then release immediately .
16
Advertisement
Table of Contents
