Arrows as quadkite spars rods spine question

    Living in Norway and no suppliers of kite rods/spars. It is however possible to buy arrow-shafts wich seem to originate from the same producers.
    But what to look for when trying to find suitable rods? Weight obviously, and stiffness and/or flex.
    Arrow shafts seem to be categorized by "spine" Wich is a measurement of how much a rod bends for a central load.
    From Easton website:
    The spine rating of an arrow is simply a measurement of its stiffness. The same Easton arrow comes in a variety of stiffness: the lower the number, the stiffer the arrow. For example, a 330 arrow is stiffer than a 500 spine arrow. There are two kinds of spine (stick with us, we promise not to get too technical). There’s static spine, which is how an arrow reacts when an 880-gram (1.94 lbs.) weight is suspended from the center of the arrow. The arrow must be 29” in length and supported by two points, which are 28” apart. The number of inches the arrow deflects or bends X 1000 due to the weight is the spine size or measurement of an arrow. So, a 500 arrow bends .5-inches when the weight is applied.
    I suspect one might find equivalent arrowshafts to most of the commercially available "kite rods". Skysharks camo offerings seems to be a "arrowshaft"
    Now i need to find the proper "spine" for my kite rod substitutes.
    Anyone with knowledge wanting to share?
    I have read that a spine of 500 corresponds to a skyshark p200, and spine of 300 corresponds to about p300.
    I realize i need to build a spine measuring rig..


    I made crude spine testing rig and found my Crystal T2 rods to have spine at approximately 500 and Chrystal T3 a spine of 390. Gives me some indications.

    Einmal editiert, zuletzt von Fireliner ()

    Hello to norway!
    I just know, that the Skyshark P90 as a lightweight rod is compsrable to Aurel Agil shafts with spine 700. On homepages of german arrow-dealers you find measures like diameters inside and outside you can compare with the Skyshark or Excel measures.


    Greetings
    Stephan

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    www.starkiter.de

    Super, more data Will try to test my travel length rods. 40 cm with center ferrule.
    I have also noted that arrows are available in ferrule size(6,2+-X) and that many arrows are "kite standard" ID6,2+-X/(OD). Will need to find suitable endcaps and T-connectors as well, although i am seriously considering 3D-prints for this.. TPU might be suitable for T-connector, and PLA for endcaps?

    Hi Fireliner,


    You might want to have a look at this old table ---> Carbon Library V1.0
    It has been set up by Denis Placette of L'ATELIER - RAMLAL TIEN back in April 2005,
    now archived by Cerf-Volant Club MIZTRAL.
    I know that the carbon library has been updated to v2.0. I believe it was in November 2006. Unfortunately it seems to be impossible to find it in the web.


    Cheers,
    Karsten

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    Thanks for the link. It seems like this information is of older date unfortunately but The info is interesting regardless of age ,specially the flex rating of the skyshark Pxxx series.
    Seems that I am looking for a spine between 700flexible/light and 240Stiff/heavy.
    Would just buy some sets of 3 and test some different arrows(cough).. kiterods.