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Icaro Laminar 13 MRX: Difference between revisions
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→For nerds ... and hang glider pilots who want to survive this sport
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==== Analysis of the Sensor video ==== | ==== Analysis of the Sensor video ==== | ||
Firstly, the analysis of the Sensor video ([https://www.youtube.com/watch?v=q_tnONxeBMA ''tumbling a hang glider'']): | Firstly, the analysis of the Sensor video ([https://www.youtube.com/watch?v=q_tnONxeBMA&t=61/ ''tumbling a hang glider'']): | ||
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==== Analysis of the U2 video ==== | ==== Analysis of the U2 video ==== | ||
In the U2 video (''Hang Glide Reserve Deployment''), the initial state of the tuck initiation is at a significantly higher angle of attack compared to the Sensor due to its flight attitude (nose high) at the onset of the stall (Point 1). | In the U2 video ([https://www.youtube.com/watch?v=_nkEQtj08us/ ''Hang Glide Reserve Deployment'']), the initial state of the tuck initiation is at a significantly higher angle of attack compared to the Sensor due to its flight attitude (nose high) at the onset of the stall (Point 1). | ||
In addition, the pilot pulls-in more, which results in a very negative moment (Point 2). The diagram of the U2 clearly shows that Phase 1 is much more dominant compared to the Sensor. The area under the moment curve is huge due to both the range of the angle of attack and the more negative moment (max. pulled-in). | In addition, the pilot pulls-in more, which results in a very negative moment (Point 2). The diagram of the U2 clearly shows that Phase 1 is much more dominant compared to the Sensor. The area under the moment curve is huge due to both the range of the angle of attack and the more negative moment (max. pulled-in). | ||
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==== Analysis of the Falcon video ==== | ==== Analysis of the Falcon video ==== | ||
In the Falcon video (''Extreme Hang Glider Whip Stall'') you can see a pilot who is only a passenger of his own hang glider most of the time. Due to the excessively high towing speed, he is hanging paralysed in his harness until he releases the tow rope or the weak link breaks. Due to the overspeed, the hang glider then pitches up to an almost vertical attitude. In terms of flight attitude, this is really the worst position. | In the Falcon video ([https://www.youtube.com/watch?v=j5HoUyUxHJw/ ''Extreme Hang Glider Whip Stall'']) you can see a pilot who is only a passenger of his own hang glider most of the time. Due to the excessively high towing speed, he is hanging paralysed in his harness until he releases the tow rope or the weak link breaks. Due to the overspeed, the hang glider then pitches up to an almost vertical attitude. In terms of flight attitude, this is really the worst position. | ||
It should also be noted that the pilot's legs are temporarily bent up to 90°, which means that the pilot's center of gravity is slightly further forward. | It should also be noted that the pilot's legs are temporarily bent up to 90°, which means that the pilot's center of gravity is slightly further forward. | ||
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==== Analysis of the Laminar video ==== | ==== Analysis of the Laminar video ==== | ||
The fact that '''nuances can make the difference between tuck and recovery''' can also be seen in the Laminar video (''Whip Stall in Laminar14MRX''). Phase 1 corresponds somewhat to that in the U2 diagram, Phase 2 to the Sensor and Phase 3 more to the Falcon. For this reason, a separate Laminar diagram has been omitted. | The fact that '''nuances can make the difference between tuck and recovery''' can also be seen in the Laminar video ([https://www.youtube.com/watch?v=UMsIkAOeJ0I/ ''Whip Stall in Laminar14MRX'']). Phase 1 corresponds somewhat to that in the U2 diagram, Phase 2 to the Sensor and Phase 3 more to the Falcon. For this reason, a separate Laminar diagram has been omitted. | ||
In the initialization phase, the pilot pulls in a little earlier than the U2 pilot (you have to watch the video very carefully). The stall is therefore not yet fully established. Compared to the U2, Point 1 and therefore also Point 2 are at a slightly lower angle of attack. The extent of Phase 2a corresponds approximately to that of the Sensor. | In the initialization phase, the pilot pulls in a little earlier than the U2 pilot (you have to watch the video very carefully). The stall is therefore not yet fully established. Compared to the U2, Point 1 and therefore also Point 2 are at a slightly lower angle of attack. The extent of Phase 2a corresponds approximately to that of the Sensor. | ||
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==== Analysis of the "Tuck out of the blue" video ==== | ==== Analysis of the "Tuck out of the blue" video ==== | ||
The fifth video (Hang glider Tuck and in air collapse Tolmin Slovenia) is a very rare documentation of a tuck out of the blue. In contrast to the previous videos, in which the tuck initiation is predictable (either due to the high angle of attack and/or the pilot's deliberate control input in Phase 0), here the hang glider tucks suddenly out of a normal gliding attitude. | The fifth video ([https://www.youtube.com/watch?v=Ofh0G0cohP0/ ''Hang glider Tuck and in air collapse Tolmin Slovenia'']) is a very rare documentation of a tuck out of the blue. In contrast to the previous videos, in which the tuck initiation is predictable (either due to the high angle of attack and/or the pilot's deliberate control input in Phase 0), here the hang glider tucks suddenly out of a normal gliding attitude. | ||
Jesper's video seems to be “the film to the book”, i.e. Adam Parer's report from 2009. I have the impression that Adam describes exactly the same tuck initiation that can be seen on Jesper's video. Adam also mentions Andreas Orgler's tuck, which seems to have a similar initiation: | Jesper's video seems to be “the film to the book”, i.e. Adam Parer's report from 2009. I have the impression that Adam describes exactly the same tuck initiation that can be seen on Jesper's video. Adam also mentions Andreas Orgler's tuck, which seems to have a similar initiation: | ||