nobody? well what I`m claiming is that you gain absalutely no speed,only kanetic energy.If you shoot an allegiance @60# with a 300 grain arrow it will go 336 fps,if you shoot a 100# pound same bow with a 500 grain arrow you get 336 fps ,anyone?

First of all you're dreaming if you think you are going to get 336ft/sec out of any bow at 60# with a 300 grain arrow. You would need less than 35 grains of virtual mass with a 1.4 SEP and that would be assuming a 32" draw and a 7" brace. That would wind up over 90% efficient with a 300 grain arrow. Ain't a bow made will do that. But never mind. I'll use your numbers and plug them in to the model anyway.

Let's see now, according to the model if I take a bow given the following:
vel =336 ft/sec
arrow wight 300 grains
peak draw weight 60 pounds
draw length 32"
brace 7"
virtual mass 125 grains (that's more realistic)

The bow would have to have an SEP of 1.78 to yield that velocity which isn't realistic but like I said, I'll use your numbers.

So if I only change the draw weight to 100 pounds and the arrow weight to 336 grains the model tells me that the new velocity would be 416 ft/sec.

blibbity ble-bla-bla...Thanks alot I have a headache now.Have you ever shot an 60# allegiance with a 300 grain arrow? Did`nt think so,now take for instance the equalizer.. shoots a 300 grain arrow 308 fps @ 60#... now get this...@ 27 1/2 inch draw,now take your thearetical 31 inch draw and throw that into the equasion,that equals 343 fps with a 300 grain arrow @ 60# -explain that away? take for instance a 60# black knight doing 350 fps with a 300 grain arrow @30 inch draw ok your turn

A heavy arrow shooting 350 fps will shoot flatter than a light arrow shooting 350 fps.PERIOD(assuming the same fletch,etc) But will not shoot flat !!!!!!

Thanks but I'll pass. Obviously no point. Besidesit would just give you another headache.

Take care!

not in my case. I'm 0-30 and it shoots just slightly and I mean just slightly by maybe a 1/2" at 10 and is money the rest of the way. Then I have another 40 and a 50

Unless your arrow can defy gravity it's path will be in the shape of a parabola. Your line of sight is of course a stright line. A straight line will intersect a parabola at 2 locations. Like I explained before, one on the way "up" and the other on the way "down" relative to your line of sight (los). Everything off those 2 points will be above or below your los. The amount it's above or below may not be significant to you. What you call money is simply acceptable error.

Just a thought,

What if you could make an arrow with the aero dynamics that it would raise, like an airplane, as it went along. In a controlled environment this arrow could shoot flat over a longer distance, but probably lose more speed. Just a thought.

Justin

Ok, I know this discussion is silly now, but if you added lifting surfaces to the projectile, you will be adding drag, which might help out to intermediate distances, but will make it drop like a rock once it gets out to a certain point where the initial energy gets used up.

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X

...just like a rifled shotgun slug with the ballistic coefficient of a brick.

dude you are are so wrong I dont know where to begin,lets start with this...there are alot of bows RIGHT NOW that do more than 336 fps with a 300 grain arrow @ 60 pounds,I can think of several bowtech`s and martin`s.Anothewr thing,arrows dont travel up???? omg I gotta get some asprin