AB‘s - Schwingungen, Prellschlag und mehr !

  • Hier mal zwei interessante YT-Videos zu oben genannter Thematik bzw. Problematik, welche insbesondere für „normale“ und leider auch für „nur“ prellschlagfeste ZF‘s meist recht zerstörerisch werden kann !


    Das erste Video zeigt eine Recurve AB / Excalibur Equinox.


    Das zweites Video eine Compound AB / Barnett Ghost 400.


    Beide Videos wurden wohl mit Hochleistungs-Einzelbild-Speedcam’s aufgenommen.


    Diese verlangsamen die Bewegung viel stärker bzw. nehmen mit viel mehr Einzelbildern auf als eine (normale) „nur“ Slow-Motion-Cam.


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  • Hier mal der Vergleich zu einer „nur“ Slow-Motion Aufnahme der Compound / Ghost 400:


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    Ergo:
    Man sieht nicht viel an Schwingungen und Bewegungen der AB ...

  • Hallo Delphin,.



    Sehr hilfreiche Videos. Als Ergänzung noch die TenPoint Slowmotion Aufnahmen zum Vergleich des AB Betriebes mit SDS und Ohne.
    Am besten beide Video´s gleich parallel laufen lassen. :thumbup:


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    Gruß,


    Walde

  • Oh toll - Danke :thumbup:


    Die Videos kannte ich noch gar nicht !
    Das ist schon ein erheblicher Unterschied 8o



    @Leerschuss


    Hattest Du nicht neulich gefragt bzw. theoretisch die Frage in den Raum gestellt, ob Sehnenstopper / Dämpfer der MW eher nützen oder doch eher schädlich sind ?!


    Aufgrund der beiden TP Vergleichs-Videos von @WaldE würde ich sagen, dass die Stopper der gesamten AB auf jeden Fall eher nützen ...

  • Der AB insgesamt auf jeden Fall. Was die MW angeht kann ich mir vorstellen dass die Stopper sie „weich“ klopfen. Solange die MW aber auf der Rail und an der Schlosskralle zuerst verschleißt spielt das keine Rolle. Sehr schöne Videos, danke an euch beide. :thumbup:

  • Hier noch ergänzend ein paar weitere Videos, auch wenn diese nicht 100%ig zu den obigen passen, geht es doch auch hier um Schwingungen, Vibrationen, Dämpfung, etc.


    BowJax vs. LimbSaver
    (teilweise wohl auch Hersteller / Verkauf motiviert)


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    Edited 5 times, last by Delphin ().

  • ... und noch ein Video, wenn auch mit anderem Inhalt:
    Bogen - Nocke - Auflage:


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  • Compound bow fired under water !
    Fast wie in Zeitlupe ;-)


    Ganz am Anfang ... und ab 6:06 Minute:


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  • @Delphin
    Was man in den Videos von deinem Post Nr.6 schön sehen kann, ist dass die Dämpfer mit den kleinen „Ärmchen“ am besten wirken. Sehe darin die Vermutung aus diesem Thread hier bestätigt. Alternative Materialien für Wurfarmdämpfer bzw. Dämpfern ? Jaja, der Klugscheisser hat’s gesagt. 8o Ich denke mal dass es auch auf die Dämpfer von Tenpoint zutrifft. https://www.amazon.com/-/de/dp/B079FKX32D Wird Zeit die Sets die ich mal günstig abgestaubt habe zu verbauen.


    Was mich bei dem Unterwasserbogen interessiert ist, ob da an der Sehne Kavitation stattfindet und damit erhöhter Verschleiß. Hat jetzt keine praktische Bedeutung wenn man einen Bogen unter Wasser verwendet holt man sich bestimmt größere Probleme ins Boot.

  • Hiermit möchte ich diesen Thread gerne mit einigen weiteren Videos fortführen, die in Zeitlupe / „SlowMo“ - Slow Motion und ggf. mit Highspeed-Kameras aufgenommen wurden:



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  • ich hätt ja ganz andre fragen zu armbrüsten. aber hier ist es mir zu englisch...


    sonst hätt ich g3efragt , wie der kurze beschleunigsweg der modernen armbrüste die pfeilbeschleunigung kompensiert im vergleich zur recurvearmbrust mit langem beschleunigsweg.....


    gruß edwin

    INVICTUS

  • ich hätt ja ganz andre fragen zu armbrüsten. aber hier ist es mir zu englisch...


    sonst hätt ich g3efragt , wie der kurze beschleunigsweg der modernen armbrüste die pfeilbeschleunigung kompensiert im vergleich zur recurvearmbrust mit langem beschleunigsweg.....


    gruß edwin

    Hi edwin2,


    hier in diesem Thread wollte ich eigentlich vorerst nur Zeitlupenaufnahmen / Videos und Ähnliches posten.


    Aber um Deine Frage zu beantworten, wird ein eher kurzer Powerstroke heute (primär bei Compound AB‘s) durch die Anordnung, Größe und Konstruktion der Cam‘s und Kabel „kompensiert“, wenn man das so sagen / vergleichen kann.

  • Und noch ein paar weitere Videos:



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  • Neulich lass ich von einer (angeblichen) Möglichkeit, selbst Zeitlupenaufnahmen herzustellen, indem normal oder vorzugsweise auch schon in Zeitlupe gefilmt wird … und diese Aufnahme dann an einem großen TV abgespielt wird und erneut in Zeitlupe aufgenommen wird bzw. abgefilmt wird !


    Ob das allerdings so richtig funktionieren mag, da habe ich so meine Zweifel !


    Es fehlen doch wahrscheinlich die „Zwischenbilder“ FPS - Frames per Second, um auf diesem Wege eine gute / sinnvolle Zeitlupenaufnahmen herstellen zu können ???

  • Ein kurzer Beschleunigungsweg wird IMMER durch eine größere Zugkraft kompensiert. IMMER!

    Daher mag ich die neuen, kleinen Excalibur Micro und alle anderen mit kurzem Powerstroke nicht.


    Leider geht der Trend in Richtung 0cm Beschleunigungsweg und unendlicher Beschleunigungskraft.


    Gruß Play

    Feinwerkbau: (FWB 600, 601,602, 603, 300S, 65, 100, 150), Steyr 110, Anschütz SA 2001, Walther: (LGM2, LG90, LGR, WLA, P88), AR20, Air Magnum, Single, Weihrauch: (HW30, HW77, HW40, HW 75), Colt ((CO2):1911, M45 CQBP, SAA), Umarex: (MP40, C96, HPP, SA177), Smith & Wesson: ((CO2): 586, Chiefs Spezial), GSG: (M11, CP1-M, CR600W, PR900W, P08), Crosman: (2240, 1377), Norconia: (P1, QB78d), Diana: (D75, Stormrider, Chaser), Jandao (Tomahawk, Chase Star, Pony)

    Edited once, last by the_playstation ().

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  • Nun folgen noch einige Videos bzgl. Zeitlupe mit Bögen / Pfeilen, die aber auch für „uns Armbruster“ nicht minder interessant sein dürften:



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  • Leider geht der Trend in richt 0cm Beschleunigungsweg und unendlicher Beschleunigungskraft.

    Sehe ich nicht so, gerade im High End Bereich wird der Powerstroke immer länger und die Spitzenzugkräfte von Excalibur erreicht man auch noch nicht im Compoundbereich.

    Das Thema hatten wir doch schon. Da Compound-ABs einen schlechteren Wirkungsgrad haben, ist das Integral der Zugkraft bei einer Compound-AB größer. Nur die kurzfristige Endzugkraft ist bei Recurve-ABs höher. Dafür bei der Compound am Anfang des Zugs.


    Die Formel ist nun Mal Kraft mal Weg.

    Bzw genauer gesagt Integral (Kraft * Weg).


    Zumindest hier im ganzen Universum.


    Gruß Play

    Feinwerkbau: (FWB 600, 601,602, 603, 300S, 65, 100, 150), Steyr 110, Anschütz SA 2001, Walther: (LGM2, LG90, LGR, WLA, P88), AR20, Air Magnum, Single, Weihrauch: (HW30, HW77, HW40, HW 75), Colt ((CO2):1911, M45 CQBP, SAA), Umarex: (MP40, C96, HPP, SA177), Smith & Wesson: ((CO2): 586, Chiefs Spezial), GSG: (M11, CP1-M, CR600W, PR900W, P08), Crosman: (2240, 1377), Norconia: (P1, QB78d), Diana: (D75, Stormrider, Chaser), Jandao (Tomahawk, Chase Star, Pony)