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Under no circumstances should the lengths of the lines or risers of the UP Ascent
4
be altered in
any way.
WARNING!
Any change to the configuration of the wing will invalidate certification!
The only change allowed is to the length of the lower brake line. This should only be
done by an experienced person.
Position of the brakes
The UP Ascent
4
is delivered from the factory with what we feel is the best brake position for most
pilots. But tall or short pilots, or those with a harness with non-standard attachment points might
consider it necessary to change the position of the brake handles.
If the brakes are to be shortened, it is extremely important to avoid the adjustment affecting the
glider's trim speed. There must always be some slack in the brakes when they are fully released.
This can be checked with the glider inflated above the pilot's head. There should be a noticeable
bow in the brake lines, and the brakes should be having no effect on the shape of the trailing
edge. If the brake lines are to be lengthened, it is important to ensure that the pilot can still stall
the canopy (i.e. during extreme manoeuvres or landing) without the need to take wraps.
If you do feel the need to change the brake line lengths, do so a little (3-4 cm) at a time, and
preferably whilst at an easy training slope. Check especially that both lines are the same length,
as any asymmetry will lead to tiring and possible dangerous flying characteristics.
If you have any questions or concerns with reference to the brake line lengths then seek advice
from either your UP dealer or directly from UP International.
BEWARE!
Loose or incorrect brake knots can cause serious accidents through loss of
the steering of the glider!
Speed system
It is important that the speed system is connected correctly, and the length checked, to ensure
smooth operation in flight.
The link between the foot stirrup and the risers consists of two cords and two brummel hooks. The
speed stirrup itself is composed of a foot bar and webbing with loops sewn on either end to attach
the cords. These cords should be run up through the eyelets and pulleys on the harness to
connect with the pulley system on the front of the risers.
If any trouble of connecting the speed system occurs, please contact the manufacturer of your
harness.
Suitable harnesses
The Ascent
4
can be flown with any harness with the main suspension point at around chest
height. The lower the suspension points the more the harness will respond to weight shift.
The recommended distance between the karabiners depends on the pilot weight:
<50kg: 38cm
50-80kg: 42cm
>80kg: 46cm
This dimensions were also used during the EN/LTF certification flights. The harness design
should also guarantee that it is possible to accelerate the UP Ascent
4
up to the maximum speed.
Please note that different harnesses can cause very different wing characteristics in extreme
situations (like increased risk of twists with cocoon harnesses).
