Quersaiten mittig anfangen zu besaiten

[fritzhimself]

Ja, so würde ich das sehen, aber es wäre mir lieber, wenn noch andere dieses Experiment durchführen würden.
Möchte nicht als "one and only", Thesen an die Forumswand nageln.

Oder ihr vertraut mir so sehr..........?

lg.

[Häuptling Webbl]

Saubere Arbeit, Fritz!!!

[LittleMac]

Oder ihr vertraut mir so sehr..........?

lg.

Ja! Oder sollten wir eher nicht?

[bomber]

@fritzhimself
Danke, für die große Mühe und den Test.

Nach einigen Recherchen habe ich nun folgenden Text gefunden, wo ein Mitglied der USRSA genau meine Frage hatte. Sie wurde folgendermaßen beantwortet:


"This technique is known as 50-50 stringing. The benefits are that you have two short ends for the crosses instead of one long end, and as a result, you have less wear and tear on the crosses from pulling the entire length through the mains each time. The obvious drawback is that you have two difficult "last crosses" to weave instead of one. What's less obvious is that there is a real danger to the frame when stringing this way. Before starting the crosses, the mains are all in and tensioned, so the hoop is compressed lengthwise (that is, it's shorter than it should be because of the pull of the main strings). If you measure across the hoop from the 3 o'clock to the 9 o'clock position, you will find that the hoop is also wider as a result of this compression. When stringing the crosses normally from the head to the throat, the tension of the crosses gradually pulls the hoop back to its normal width.

The accompanying chart shows this progression of hoop deformation and recovery on a Wilson Pro Staff 6.1 Classic (16×18 pattern) during stringing on a Babolat Star 3. For this test, we used a "box pattern," which means that we installed 14 mains, then the top cross, then one outside main, then the bottom cross, then the final outside main, and then continued filling in the crosses from the head down. We measured the length of the hoop (12 o'clock to 6 o'clock) and width of the hoop (3 o'clock to 9 o'clock) using frame micrometers before starting, and after the installation of each of the 34 strings. The chart shows 37 data points: one for each of the strings; plus an initial point for the unmounted, unstrung racquet (point zero on the chart); a final point for the unmounted, strung racquet; with the next-to-last point being the measurements taken after tying off the final cross and releasing the string clamps.

As you can see, the first pull actually lengthens the hoop because there is nothing to offset the tension of the string pulling the far end of the hoop toward the tension head. The installation of the second main starts to pull the hoop back, but by the fourth main, the hoop is clearly becoming shorter and wider. Installing the crosses once again pulls the hoop back into shape, and the resulting deformations are well below the maximum acceptable deformation of 0.094 inches (3/32 inches). You will note that the hoop of the strung racquet is compressed so that it is both shorter and narrower than that of the unstrung racquet.

However, even these figures do not tell the whole story. When stringing 50-50, the first crosses (in the center of the hoop) exert a tremendous amount of pull immediately at the point where they have maximum leverage. The more effective these crosses are at returning the hoop to its normal width, the more the width of the racquet will return to normal immediately (rather than gradually). This relatively sudden change in the width of the hoop will transfer the stress and compression of the hoop into the "shoulders," causing them to square off. This concentration of stress is usually less of a problem toward the throat, where the hoop is reinforced by the shaft, but at the head, the combined tensions of the mains and crosses serve to turn a curve into a corner, which can weaken the frame at the shoulders and make it more susceptible to breakage."
Quelle: USRSA, published 3/2005


Gerade der letzte Absatz sagt doch aus, dass bei der "50:50 Methode" später im Kopfbereich der Rahmen deutlich mehr gestreßt wird (hier wirken die Quersaiten so stark auf den Rahmen, dass der Rahmen eher "eckig" gezogen wird und somit erhöhte Gefahr für einen Rahmenbruch besteht)