Windtech tonic User Manual download pdf (Page 13)

regain level flight. Like this, the pilot can control the bank angle and the sink rate of the

glider in the Spiral dive. Always remember that whilst in the Spiral dive you are drifting

with the wind, and it is very easy to become disorientated.

This manoeuvre is not approved for bank angles higher than 60 degrees. At this upper

limit the sink rate of the canopy is approximately 10 m/s and the overload is equal to

2G's.

For bank angles higher than 60 degrees the sink rate can achieve 20 m/s but the greater

overload (High G's) can cause eyesight and equilibrium problems, and cause some peo-

ple to 'black out' (faint), which consequently can make the manoeuvre extremely dange-

rous.

To recover from a spiral dive, the inner brake must be progressively and slowly released,

until the canopy assumes normal flight, and angle of bank, again. A good rule of thumb

is to use the same number of 360-degree turns as you did on entry on exit to give a safe

and progressive pullout. If you release hands up from a tight spiral dive you will expe-

rience a big surge followed by a dive. (In turbulent air this can result in a collapse.) The

TONIC has been tested for this but it is advisable to learn the correct exit method, i.e.

progressively release the inside brake.

> b line stall

The B-line stall is a real stall, and even though the wing appears to be flying above your

head the laminar airflow over the wing is completely lost. During B-Stall, the canopy

falls perpendicularly to the ground (straight down, but drifting with the wind) at a sink

rate of 5 to 12 m/s, with an angle of attack of 90 degrees.

To enter a B-Stall, it is necessary to sit upright in your harness, reach up with the brakes

still in your hands (preferably with the toggles around your wrists) & securely clutch each

B risers in each hand at the top near the Maillons Rapides (quick links). To enter the B-

line stall, pull down symmetrically on the B risers. (About 40 cm)

The force initially is quite hard (up to about 15cm) but for the last part the force requi-

red to pull down is less. Keep your weight centred in the harness, and keep the risers held

at a symmetric level to each other. The more B riser pulled the faster the decent rate, but

the glider can become unstable with a very deep B-line.

To return the glider to normal flight:

Ease up the B-risers SYMMETRICALLY for 50% (25-cm of B-line still held) holding some

pressure, then symmetrically completely and rapidly release them. What you are trying to

achieve is to not shock-load the glider by an immediate release from a deep B-line, whilst

at the time not easing off too slowly and risking a deep stall in turbulent conditions.

Releasing the B-lines from a deep B-line position works fine (& if unsure whilst attemp-

ting the manoeuvre simply release the B-lines together from this position) but puts

unnecessary load on the glider.

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Windtech tonic User Manual Page 13