12
SPI values
The following table gives the theoretical values for two (30% and
80%) accelerate positions on the SPI. Notice that each SIGMA 8 size
has a slightly different polar curve.
Practical examples for best glide with SIGMA 8 25
• With no headwind (or with a tailwind), little or no expected thermal,
and the glider’s normal sink rate (ca. 1 m/s vario) fly with no speed
bar.
• With a headwind of 10.5 km/h or an expected next climb (vario)
of 0.4 m/s or a sink rate (vario) of 1.4 m/s set the 30% position.
If two or more of these values apply at the same time you can
already use the 80% position.
• With a headwind of 22.5 km/h or an expected climb rate (vario) of
1.3 m/s or a vario sink rate of 2.3 m/s choose the 80% position.
SIGMA 8
23
25
27
29
30% Position
Headwind in km/h
*
10.5
*
*
Expected climb in m/s
(Vario value)
*
0.4
*
*
Sink rate in m/s
(Vario sink)
*
1.4
*
*
80% Position
Headwind in km/h
*
22.5
*
*
Expected climb in m/s
(Vario value)
*
1.3
*
*
Sink rate in m/s
(Vario sink)
*
2.3
*
*
*
At present the data for these sizes are not yet available
Содержание SIGMA8
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Страница 2: ...Edition 01 2011 ...
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Страница 34: ...34 Parts Cells Winglet Velcro openings Longitudinal straps Ring Raff System Nylon Wires ...
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