YOUR MANTRA R11
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ENGLISH
The R11 is a carefully refined evolution of the R10.2: We have striven
to retain all of the best characteristics of the R10.2 while improv-
ing some of its issues. The R11 includes several highly innovative
new features such as the Shark Nose. These have led to significant
improvements in performance, comfort, and ease of use.
The main aim of the R11 project was to increase the top speed and
improve top speed stability. We have achieved this with the help of a
careful sail-reshaping and with the help of the new Shark Nose. The
new profile, with the new cell opening positioning increases the inter-
nal pressure, especially at low angles of attack.
This means that not only can the R11 achieve a faster top speed
than the R10.2 but it also remains more stable at this speed (with
a greater resistance to collpase). The R11 is more comortable to fly,
the sail moves less and there is less migration of air (outflow) around
the leading edge so the internal pressure remains more constant.
Brake Lines
The main brake line lengths have been set carefully during testing,
however, if you do choose to adjust them, please bear in mind the
following:
Do not reduce the set lengths, this may cause the wing to en-
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gage the brakes whilst at full speed.
Ensure both main brake lines are of equal length.
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If a brake handle has been removed, check that its line is still
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routed through the pulley when it is replaced.
When the brake handles are released in flight, the brake lines
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should be slack. There must be a substantial “bow” in them to
guarantee no deformation of the trailing edge.
IMPORTANT: In the unlikely event of a brake line snapping
in flight, or a handle becoming detached, the glider can be
flown by gently pulling the rear risers (B-risers) for direc-
tional control.
Risers
The Mantra R11 has been designed with 2 rows of lines A & B.
C lines are no longer necessary; they only create drag.
Each riser has a set of trimmers, these are used to slow the wing in
thermals and to optimise the trim speed.
Total Weight in flight
Each R11 has a defined optimum weight range, it does not have to
be flown at the top of this range for a good feel and handling, this can
also be achieved near the bottom of the range. If you are between
sizes the following information may help you:
If you want better speed, precise handling, and generally fly in moun-
tains and/or in strong conditions, you should chose to fly in the top
part of the weight range. If you want a better sink rate, or if you gen-
erally fly in flat lands and/or in weak conditions, you may choose to fly
near the bottom part of the weight range. Remember, you can always
add ballast when conditions are stronger.
