Whats the relationship between efficiency and speed?

[Dan Bonner]

190fps at 10gpp is kinda the holy grail at 28". Very few hunting bows even come close. I would be very happy with anything over 175 at 26".

Bonner

[Matabele]

L82HUNT, would you mind pm'ing me the make of bow you are getting. Id be interested to know whats pushing out that performance.

Thanks for the input everyone.

[Jeff Strubberg]

I was assuming a standard arrow weight.  And O.L. is right, you can have two bows with the same draw weight that produce different efficiency figures.  Wouldn't be much point in measuring efficiency if this wasn't true.

Using different bow weights was just a simple way to illustrate the idea. Make it 50 ft.lbs versus 70 ft.lbs rather than draw weight if you like.

[grizz]

Before we get our shorts all up in knots, lets wait and actually see what a given bow with the correct weight arrow will chrono at!

[elktalker]

I shoot 180fps w/654gr. arrow at 65# out of a savanah longbow. Is that good? hope so cant afford costom.

[TradBowyer]

elktaker,
Why worry about it? if you like the bow and it shoots good, don't worry about it. Speed doesn't mean anything if you can't hit what you are aiming at. I'll take a slow bow any day that i can shoot well over a screamer that i spray arrows with. One time i personally saw an older gentleman step to the line with a twisted up selfbow and wood arrows right next to Widow shooters with skinny carbons. It seemed like you could run down the range and grab his arrows before they hit the target LOL but he could pound the yellow. I just saw back and watched him shoot for a while. THe simplicity of his setup is what traditional archery is all about and why I got rid of the compound in the first place. nothing against fast bows and carbon arrows. I shoot a high performing bow myself but I try to keep everything in perspective.

[champ38]

ttt

[wollelybugger]

Here's my baloney, The energy stored in the limbs when your bow is pulled transfers into your arrow when released. The heavier the arrow the more efficient the bow, the less speed. Hence the quieter the bow.

[Molson]

I was a "why worry about it" kinda guy too but the fact is, if you bowhunt, you should be concerned with the speed you're getting from your bow.  I thought I had a "good enough" understanding of the efficiency/speed thing but I need to learn more.  I want to know when I'm pulling 60# but only getting 50# of performance.  That's worth worrying about, especially the lower you go in draw weight.

[Lenny Stankowitz]

"All I know is I ordered one of these bows yesterday.  And was told with my 26" draw and a 600 grain arrow I would see 190fps+."


Good luck widdat...

Lenny

[O.L. Adcock]

At 8-8.5gr/lb that's about right. Hope it wasn't A&H that made that claim!   ....O.L.

[Orion]

If my math is correct, that would make it about a 70-75# bow at 26 inches.  Yep, should make 190fps.