Ozone ALPINA 4, Руководство пилота

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Porosity is measured with a porosity meter, the time taken by a certain volume of air to go through a
certain surface of the cloth. The time in seconds is the result. A measurement is done in a several places
on the top surface along the span of the glider behind the leading edge.
The tearing resistance of the cloth - A non-destructive test following the TS-108 standard which
specifies minimum tear strength for sky diving canopies should be made using a Bettsometer. (B.M.A.A.
Approved Patent No. GB 2270768 Clive Betts Sails)
Strength of the lines
- An upper, middle and lower A line, along with a lower B and a lower C (and lower
D if applicable) line should be tested for strength. Each line is tested to breaking point and the value
recorded. The minimum value is 14G for all main riser lines calculated from the maximum certified flying
weight of the glider. The added minimum strength for the middle lines and upper lines should be the same
value. If the breaking strength is close to the minimum value calculated, the professional should give a
period after which the strength test should be performed again.
Lengths of the lines
- The overall length (riser lines + mid lines + upper lines) has to be checked under
5Kgs of tension. The difference between the measured length and the original length should not exceed
+/- 10mm.
Compliance of the test sample’s suspension lines, brake lines and risers were checked by the testing
laboratory after the test flights were completed.
Risers - Visual inspection for signs of wear or abrasion. Differences to manual lengths should not exceed
+/-5mm.
Canopy check - A full visual check should be carried out: All the components of the wing (stitching, ribs,
diagonals, lines, tabs, ...) should be checked for signs of deterioration.
Finally, a flight test to confirm that the wing behaves normally should be carried out by a professional.
Modifications
Your Ozone Mantra M7 was designed and trimmed to give the optimum balance of performance, handling
and safety. Any modification means the glider loses its certification and will also probably be more difficult
to fly. For these reasons, we strongly recommend that you do not modify your glider in any way.