DAVINCI GLIDERS / HULA
8
11.2 Frontal collapse
HULA does not come out asymmetrical front collapse by itself. It has high internal
pressure with its well-designed profile. However asymmetric collapse may occur in
strong turbulent conditions, but It could be fast recovered if you apply the brake down
to 15 to 20cm. Release the brake lines, you may recover to the normal flight.
10. In flight characteristics
11. Deflations
11.1 Asymmetric collapse
The asymmetric collapse usually happens when the pilot has not foreseen this possible
reaction of the wing.
Asymmetric collapses should be controlled by weight shifting away from
the collapse and applying enough brake to control your direction. And you
should use the brake to re-inflate the glider.
HULA has the best stable glide performance in a normal position with no any brakes. In strong thermals and
turbulence, we recommend gently pull both brakes without acceleration to increase stability. The brakes
provide feedback about the surrounding air, which is needed for active flying.
To familiarize yourself with the HULA your first turns should be gradual and progressive. To make efficient
and coordinated turns with the HULA first look in the direction you want to go and check that the airspace
is clear. Your first input for directional change should be weight-shift, followed by the smooth application of
the brake until the desired bank angle is achieved. To regulate the speed and radius of the turn, coordinate
your weight shift and use the outer brake.
In the unlikely event that a brake line releases from the brake handle or breaks, the glider is maneuverable
using the C-risers. By pulling gently on the C-risers it is possible to steer the glider and land safely.
Alternative Steering:
In the unlikely event, that a brake line releases from the brake handle, or breaks, or the brake-lines are
tangled up, the glider is maneuverable using the rear-risers. By pulling gently on the rear-risers, it is possible
to steer the glider and land safely. Don’t pull the rear-risers too much, to avoid a deep stall!
In spite of the HULA has great stability of the flight, strong turbulence or piloting error may cause a portion
of the wing suddenly to be deflation.
