Your Delta and SIV

The Delta features an advanced line plan for reduced drag and increased stability and comfort. This line plan is part of the reason that the Delta excels in active thermal conditions and it is also every bit as strong and durable as any Ozone wing.  However, because of the line attachment placements, it is not possible to perform a regulation pilot-induced collapse using the entire A risers. Without specially attached collapse lines, the Delta will not react to artificially induced collapses in a proper manner. You may attend an SIV course using your Delta, with no problems. The glider is strong and well behaved. However, we do not recommend inducing collapses by pulling the A risers.

*You may instead induce collapses using the outer 2 A lines*  

All other maneuvers can be performed as normal.

We would like to clarify that:

• 1.- The Delta is strong and durable, exceeding the 8G EN load test.
• 2.- The Delta reacts well to properly induced collapses using collapse lines, and passed the EN C class tests with very gentle results (see the test reports on the specifications page).
The Delta is a new generation of wing which incorporates R10 technology. One of the developments we have made is moving the A tabs further away from the leading edge and deeper into the chord. In a real-life collapse, the Delta behaves in the same way as any other wing in this category, however to induce a more natural, lifelike full speed collapse conforming with EN certification requirements the deflation must be done with the addition of collapse lines. When you induce side collapses without the collapse lines the results can be different…the canopy pre-accelerates* before the deflation occurs and the resultant collapse has more volume of air still trapped within the sail, and this causes the collapse to fold with a greater angle. However, If done properly, it is not a problem to induce side and frontal collapses at trim speed without the collapse lines, these behave quite normally and within the parameters of EN C. But at full speed, without collapse lines, results can be more aggressive and potentially fall outside of these requirements. The collapse lines need to mounted accurately and with the addition of attachment tabs sewn into the nose and since these are not supplied with the wing we strongly recommend to not induce collapses at all.

We think this is a small price to pay for a more solid glider, the feeling on the bar is the best we know; solid, stable and confidence inspiring. If the Delta is flown with normal active input it is a very stable wing indeed, in fact it is one the most tuck resistant wing we have ever made.

*Pre acceleration is when the glider accelerates before collapsing. Imagine flying at full speed and pulling an A riser to induce an asymmetric collapse. Instead of deforming and folding immediately, the side that you pull actually accelerates first (because of the reduction of AofA), thus momentarily causing a turn in the opposite direction. At the point of collapse, because everything is not in line (slight turn, slight roll/yawing action in the other direction) the collapse is somewhat artificial with a greater angle and a potentially more dynamic reaction.

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