Fullstall; Flying Without Brakes - Sky FIDES 4 Handbuch

9) Full Stall
Certain behaviour or weather conditions can bring about a full stall. This
is a serious manoeuvre that can be difficult to manage. If full stall happens
less than 100 m above the ground, deploy your reserve immediately.
Main Causes of a Full Stall:
 A poorly timed or an extensive use of brakes when the air speed
of the wing is reduced (e. g. when coming out of a spiral or speeding up
after a B-line stall).
 Soaked or heavily drenched leading edge (from rain or a cloud) can result
in a stall due to an uneven airflow over the leading edge. This process has
been related to high levels of porosity in the glider's cloth.
Whatever the cause, a full stall can be either symmetrical or
asymmetrical (a spin). In both cases the pilot has two possible courses
of action:
 If the full stall happens above 100 m execute the stall recovery assuming
the pilot is familiar with this technique (i.e. a complete execution of the full
stall, stabilization of the wing and lifting hands progressively to come back
to a normal flight).
 If the full stall happens below 100 m or if the pilot is unfamiliar with stall
recovery the reserve should be deployed immediately.

10) Flying Without Brakes

If a brake line or pulley breaks it is possible to fly the FIDES 4 using the D
risers (rear risers). Exercise care when pulling the D risers as the deformation
of the wing is greater than that produced by using the brakes and the glider
can quickly approach the stall point..
Tip: Practice this way of steering to be prepared in case of a brake failure!
11) Comments on the testing procedures
All maneuvers were carried out over water in a stable air mass with standard
temperature, humidity and pressure. They were carried out by professional
pilots trained to react to any problem in the most appropriate manner.
Test reports are available on the website: www.sky-cz.com.
12) Harness adjustments
For test flights the pilots used ABS harnesses with the following set-up:
Distance from seat
Size Distance between hang points
board to hang points
FIDES 4 S 41–42 cm
FIDES 4 M 42–43 cm
FIDES 4 L 43–44 cm
FIDES 4 XL 44–45 cm
We recommend adjusting your harness as close to the test adjustment as
possible. Excessive cross-bracing increases the risk of risers becoming
twisted during extreme manoeuvres. A looser setting will result in a tendency
to fall towards the collapsed side.
Lower hang points reduce the roll-stability of your harness and can slow
down the reopening of asymmetric collapses.
Higher hang points (+ 2–4 cm) have no influence on inflight safety and can
therefore be tolerated.
42–43 cm
43–44 cm
44–45 cm
45–46 cm
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