Advance acoustic IOTA DLS, Product Manual, Page: 7 / 23

The Speed Performance Indicator (SPI) gives you an indication of the relationship between your accelerate range
and your wing’s polar curve, and it also indicates whether your speedbar/loop application is symmetrical. It also
helps you set up your speed system. Set the length of your speed lines so that you can use the full travel of the
speed system, and that the red indicator shows 100% when the second rung of the speedbar/loop is fully extended.
This setting should arrange that the first rung reaches approximately the 50% position.
Warning
The speed system is correctly adjusted when you can use the full travel available on the
risers. Make certain that the speed lines are not set too short, thus causing the wing to be
pre-accelerated all the time!
3.4. Suitable harnesses
Basically the IOTA DLS can be flown with any harness that does not have rigid cross bracing.
For the tests the following settings were used for the harnesses:
All-up in-flight weight less than 80 kg: carabiner distance 40 ± 2 cm, height 40 ± 1 cm
All-up in-flight weight 80 to 100 kg: carabiner distance 44 ± 2 cm, height 42 ± 1 cm
All-up in-flight weight more than 100 kg: carabiner distance 48 ± 2 cm, height 44 ± 1 cm
Info
Experience has proved the theory – a streamlined harness can significantly improve
gliding performance.
3.5. Weight range
The IOTA DLS comes out in five sizes. The weight ranges for the different wing sizes are listed in the “Technical
Data“ section. The figures given there refer to total take-off weight. This includes the pilot’s body weight including
clothing, as well as the weight of all the equipment (paraglider, harness, instruments, etc. – everything that’s going
to fly).
Seamless Weight Ranges
The IOTA DLS was planned for Seamless (continuous) weight ranges, with no overlapping. These arrange that any
particular flying weight features in only one glider size. These IOTA DLS Ideal takeoff Weight Ranges provide the
best comprise between speed and climbing performance for all normal conditions, for each glider size.
For special requirements the choice of size still remains in the overlapping sections of the wider Certified Weight
Ranges. Flying outside the Seamless Weight Ranges, in other words near the lower or upper certified weight limits,
can alter a paraglider’s flying behaviour and handling, but without affecting your safety. Glide performance
remains the same over a complete weight range, but climb performance is altered.
If the IOTA DLS is flown outside its Seamless Weight Range, in the upper part of its Certified Weight Range, the
higher wing loading will raise its trim speed and produce more dynamic and agile flying characteristics.
4 / 20