52
being we recommend the Vary-Grip big ears configuration
together with a speed increase using the trim system.
B-Stall / C-Stall
The B-stall and the C-stall put extreme stresses on the entire glider
as well as threatening its profile shape. This kind of fast descent is
not particularly effective either. We recommend that you do not do B-
and C-stalls with your BIBETA 4 and so give no instructions here. Be-
cause of the wing’s high structural stiffness the B- or C-stall is just
about impossible to achieve.
Stall
One-sided stall (spin)
In a tight turn the BIBETA 4 gives early and clear warning of the risk of
stalling by strongly rising brake loading. If the wing should stall, how-
ever, the BIBETA 4 will react dynamically. Depending on the situation
from which you let the glider recover a vigorous response can result
(surging forward with an increased risk of collapse). While shooting
forward the wing can be slowed down by appropriate brake. If this is
done normal flight can be resumed without further collapse.
Tip: We recommend that the simulation of spins and spin
entries are not carried out in safety training. The high wing
loading means that some reactions could turn out to be very
dynamic.
Tip: Fundamentally, you should respond to all out-of-control
behaviour, especially the start of spin rotation, by completely
releasing both brakes (both hands up).
Full stall
The BIBETA 4 responds early to brake inputs, but the brake travel is
also very long. This implies a large safety margin for the pilot, and it
is difficult to encourage the BIBETA 4 to fullstall. Should the glider be
stalled, however, and depending on the situation from which you let
the glider recover, a vigorous response can result (surging forward
with an increased risk of collapse). While shooting forward the wing
can be slowed down by appropriate brake. If this is done normal flight
can be resumed without further collapse.
Tip: We recommend that the simulating of the fullstall is
avoided in safety training. The high wing loading means that
some reactions could turn out to be very dynamic.
Summary of Contents for Bi Beta 4
Page 1: ...1 BIBETA4 Betriebshandbuch User manual Manuel d utilisation...
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Page 3: ...Deutsch Seite 5 32 English Page 35 61 Fran ais Page 63 90...
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Page 105: ...ADVANCE Thun AG Seestrasse 14 CH 3602 Thun...
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