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Viewing 15 posts - 136 through 150 (of 161 total)
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  • jpcjpc
    Member
    Post count: 170

    A good close pic should be a good start

    jpcjpc
    Member
    Post count: 170

    Never heard bare shafts more accurate than arrows with feathers , never saw bare shafts for competition or bowhunting

    So, why not to look at this problem from the other side ?

    I mean have a close look at what can be wrong with the way you set feathers on your shafts

    jpcjpc
    Member
    Post count: 170
    in reply to: Spring Bear #53020

    Super shoot

    How much this bear weighted ? Or how long from nose to tail ?

    jpcjpc
    Member
    Post count: 170

    I think 75 grs make a diference after 15 meters

    On another hand lights arrows lose speed faster than hevier

    Everytime you moove weight you have to train a few days

    Brain is a nice machine but you have to be patient to get a new goal

    jpcjpc
    Member
    Post count: 170
    jpcjpc
    Member
    Post count: 170
    in reply to: Wood Arrow Advise #37389

    Bears are very little resistant to penetration and have very thin skin

    45 Lbs with 400 grains arrows are enough for a 250 Lbs bear

    In order of importance to have a fast and clean ( human ) kill

    1 / Presicion Kill zone

    2 / very sharp blade

    3 / single blade

    4 / arround 10 Lbs / bow poundage

    You can get penetration with single bevel blade

    without add to much weight

    One of my friend killed 3 african buffalos with Dwyer LB set @ 65 Lbs and 750 grains arrows

    His secret : he never shoots @ more than 12 meters !

    jpcjpc
    Member
    Post count: 170
    in reply to: Wood Arrow Advise #37167

    wojo14 wrote: OK, my bow right now is a 51 @ 28. 58″

    It is a Striker reflex deflex long bow.

    My draw is 26.5″

    I know my arrow weight 525 gr built.

    5″ trad cut feathers.

    Dont get me wrong, the arrows fly great!

    Just looking to increase FOC. I still want to shoot wood.

    I love making them.

    51 @ 28 must be around 42/44 Lbs at your 26 1/2 That is to say you shoot something like 12 grains / Lbs

    If you hunt very heavy game that can be good, but you must shoot very close

    On an other hand spine selectors for wooden shafts are the same from the old time when bows were only made with wood

    To day with moderns bows you should choice 61/65 wood shafts

    And find a better balance between straight fly and arrows weight

    I killed european wild boars with 9 grains /lbs and 420pounds bear in Canada with 2117 alu and 125 grains Zuikey broahead

    jpcjpc
    Member
    Post count: 170
    in reply to: Wood Arrow Advise #36073

    Your arrows are 50/55 ok, but what about your bow ….

    Self, LB or recurve center shoot or not ? fiber or carbon or self bow ?

    Draw weight ? and draw lenght ?

    Also interesting to know bare arrow weight ……..:roll:

    jpcjpc
    Member
    Post count: 170
    jpcjpc
    Member
    Post count: 170
    in reply to: Noisy Recurve #32361

    :D:D

    jpcjpc
    Member
    Post count: 170
    in reply to: Noisy Recurve #26661

    Try it It works very well

    Any material you can glue will do the job

    http://www.3riversarchery.com/Calf+Hair+String+Groove+Silencers_i3559_baseitem.html

    jpcjpc
    Member
    Post count: 170
    in reply to: Widow test drive #8554

    Not all foam cores or composite cores are equal. Some are made with polyurethane resins and the stronger materials made with the more expensive Epoxy resins. The density and strength of the material is based on the percentage of filler to resin and the characteristics of the material is based on what filler bulks out the resin system, stronger weaker lighter heavier more dimensionally stable less dimensionally stable. The elasticity of the core is meaningless. Lets assume that the composite core is half as elastic strong as bamboo. Okay then here is an example just and example and not and actual situation just and approximation, then assuming the bamboo core alone without the composite bow facings generates a bow drawweight of 1Llbs and the composite core .75lbs and the bow weight is 55lbs So the bamboo core is responsible for 1.8% of the drawweight and the Composite core is responsible for 1.3% so the difference in bow weight generated is 0.5%. 0.5% is nothing and would hardly affect the speed at all. However a 20% weight reduction in core mass is about a 7% mass reduction in the whole limb and that is significant and represents about 2 fps. But some composite cores will be roughly the same weight as the wood core and so no different.

    jpcjpc
    Member
    Post count: 170

    All foam cores or composite cores are equal. Some are made with polyurethane resins and the stronger materials made with the more expensive Epoxy resins. The density and strength of the material is based on the percentage of filler to resin and the characteristics of the material is based on what filler bulks out the resin system, stronger weaker lighter heavier more dimensionally stable less dimensionally stable. The elasticity of the core is meaningless. Lets assume that the composite core is half as elastic strong as bamboo. Okay then here is an example just and example and not and actual situation just and approximation, then assuming the bamboo core alone without the composite bow facings generates a bow drawweight of 1Llbs and the composite core .75lbs and the bow weight is 55lbs So the bamboo core is responsible for 1.8% of the drawweight and the Composite core is responsible for 1.3% so the difference in bow weight generated is 0.5%. 0.5% is nothing and would hardly affect the speed at all. However a 20% weight reduction in core mass is about a 7% mass reduction in the whole limb and that is significant and represents about 2 fps. But some composite cores will be roughly the same weight as the wood core and so no different.

    not all composite core materials are equal.

    Hyperflex cores are lighter in weight over wood cores by approx. 20% and that gives the bow 2 to 3 fps speed advantage. Also due to the lower limb mass there is less hand shock and so a smoother after shot and lower vibration

    jpcjpc
    Member
    Post count: 170

    With Foam and carbon you can have same arrow at 42 Lbs than a BW at 55

    same arrows, same archer, same draw length

    And the bow is stronger against torque than any other one without carbon

    Ford or Ferrari can do same trip, but there is some différence

    Why not have the best when money is not a problem

    some console themselves by saying that carbon is unnecessary but would be happy if they could have one to try

    jpcjpc
    Member
    Post count: 170
    in reply to: Widow test drive #48840

    @ same weight same lenght same arrows a 42 Black Douglas from Border with HEX6 limbs shoot faster than a BW @ 50

Viewing 15 posts - 136 through 150 (of 161 total)