Stall Manoeuvres; Spin; Fullstall - Nova IBEX 2 Manual

Stall manoeuvres

Spin

If you pull one brake too much, you might induce a so called spin. The centre
of rotation is no longer far outside the wing (like during a normal turn), but it
moves inside the wing. Furthermore the rotation speed increases. The IBEX 2
will go back to normal flight, if the pilot releases both brakes. The IBEX 2's
spin behaviour is easily manageable: It takes a lot of brake travel to induce the
spin, and then the pilot has quite some time to react and release both brakes.

Fullstall

If you pull both brakes too far, the wing will perform a so called full stall. The
wing suddenly stops its forward motion, but the pilot is still moving forward.
So from the pilots view, the glider will tilt backwards. It is very important to
not release the brakes in this moment. Otherwise the glider might surge forward
below the pilot.
The Full Stall is a complex manoeuvre and the perfect execution can not be
explained in this manual. If you want to learn a proper full stall, it makes sense
to do this under professional guidance.
Due to the small size of the glider, the fullstall is especially demanding to
perform on the IBEX 2. We strongly recommend only to perform fullstalls if
you are already able to perfectly execute them with other gliders.
The available brake travel before stalling the wing depends on the size. It is
approximately 55cm for the IBEX 2 17 and 50cm for the IBEX 2 15. Those
numbers are just a rough indication. (The publication of the brake travel is
claimed by the EN 926.)
It would be dangerous to use the brake travel according to those numbers,
because it is not practicable to measure the brake travel during flight, and in
turbulences the stall might occur with less brake travel. If you want to use the
whole brake travel of your glider safely, it is necessary do many intended spins
and full stalls to get a feeling for the stall behaviour.
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