Advance acoustic SIGMA 10 Pierwsze kroki - Strona 7

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2-Phase Speed System with SPI

The Speed Performance Indicator (SPI)

helps you choose your speedbar position.

In accelerated flight it indicates your relati

onship to the accelerated part of the wing's

polar curve, and confirms symmetrical

application.

Spend some time setting up your speedbar

lines correctly:

Set their lengths so that the first speed

bar step gives you the 40 % position on

the SPI, and the second step reaches

80 % SPI. With this configuration you

should be able to reach 100% (pulley

to pulley) with toes at full stretch on the

second step.

By moving the knots

the ball position

can adjust the ratio change position to

suit your leg and body length.

Pic 1 shows low gear – 3:1, and Pic 2

shows high gear – 2:1

and therefore

on the risers you