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Icaro Laminar 13 MRX: Difference between revisions
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→Impact of VG setting on tuck susceptibility: Explanations for the diagram
(→Impact of VG setting on tuck susceptibility: Explanations for the diagram) |
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==== Impact of VG setting on tuck susceptibility ==== | ==== Impact of VG setting on tuck susceptibility ==== | ||
Activating the Variable Geometry (VG) system not only improves performance and worsens the handling of the hang glider, but also significantly alters the pitch moment characteristics. | |||
Figure 12 shows the measured moment curves for both a fully relaxed VG (VG 0%, blue curve) and a fully pulled VG (VG 100%, dark red curve) at a flight speed of 40 km/h. To improve comparability, both curves were shifted along the x-axis so that α<sub>0</sub> aligns with the origin. | |||
It is clearly evident that at VG 100%, the pitch-down tendency is significantly more pronounced. Phase 1 spans a much wider range of angles of attack. Additionally, in Phase 2, the deceleration of rotation is significantly reduced, as it occurs over a smaller angle-of-attack range compared to VG 0%, and the pitching moment is noticeably lower. Both of these factors contribute to a more aggressive nose-down behavior. '''The more the VG is pulled, the more aggressive the pitch-down becomes'''. | |||
Even minor disturbances can cause a sharp nose-down pitching motion, increasing the risk of a tuck. Therefore, '''flying slowly with a pulled VG requires heightened attention'''. In turbulent conditions, the pilot must always be prepared for sudden nose-down behavior and remain on high alert at all times. Once the nose drops, the reaction must be extremely fast. Ideally, the pilot's arm muscles should be “spring-loaded” to allow for pulling in immediately without hesitation. | |||
In general, in turbulent air slow flight with VG pulled should be avoided — or performed only by pilots who have fully understood and internalized the principles explained in this article. | |||
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[[File:VG-Setting Impact on tuck en.jpg|left|thumb|800px|Figure 12: Impact of Variable Geometry Settings on Tuck Susceptibility]] | [[File:VG-Setting Impact on tuck en.jpg|left|thumb|800px|Figure 12: Impact of Variable Geometry Settings on Tuck Susceptibility]] | ||