Bow hunters might want to check this website out.

[firehawk1]

Saw this website and thought I'd pass it along. A sliding weight added to the inside of an arrow shaft which increases penetration. The video of the penetration thru plywood is impressive IMO.

PENETRATOR KINETIC ENERGY AND PERFORMANCE ENHANCEMENT SYSTEM

 

[Cameramonkey]

Physics FTW!

 

[Mgderf]

Makes sense.

 

[yote hunter]

Might be cool, but if it ain't broke don't fix it is the way I see it... Someone will want it ? !

 

[Hookeye]

Weight at the back of an arrow stiffens spine....how will that affect tune?
How much resistance is required for usable weight shift?
The time from weight shift start to stop is how long?
How does that compare to total arrow travel time through an animal on non shoulderblade hit (I almost always pass through- even with recurve)?

It appears that such an item may be of benefit when encountering bone (major resistance), which is pretty much a bad idea with archery gear anyway.

Maybe a help on a problem that shouldn't (maybe doesn't) exist.

 

[Willie]

Interesting...but why not just shoot a heavier arrow?

With my crossbow I am WAY into overkill on KE.. All pass throughs...

 

[JeremiahJohnson]

One more moving part. The weight could be forward at the shot or not fully to the rear...all kinds of changes to the bending of the arrow which effect tune...

Cool idea, but I'm a minimalist. I keep my rig as simple as possible - simple, rugged, reliable. Murphy's a bit#h in the field.

 

[buckwacker]

I'm not sure the physics make sense. KE is a function of mass and velocity, and if those two things remain constant, so does KE. A little slider won't add KE; you have to either fix mass or velocity and increase the other, or increase both.

 

[JeremiahJohnson]

I'm not sure the physics make sense. KE is a function of mass and velocity, and if those two things remain constant, so does KE. A little slider won't add KE; you have to either fix mass or velocity and increase the other, or increase both.

Total KE - no - but this is adding an impulse like a shock machine or jack hammer. To total KE is the same, but the shape of the curve is different if you break it into two impulses: arrow hits bone, then basically hits it again. A concentrated or spiked impulse curve is much more damaging then a smoothed out (dampened) curve - like shock absorbers or rubber stops.

 

[Hookeye]

IMHO you're already screwed when the sliding weight comes into action.

I seriously doubt the little weight can drive an almost stopped arrow deep enough past the limiting medium.

KE KE KE..................there's more to it than that.

KE is simple math that helps with comparing/selling products. I typically run low KE setups, and blow through deer LOL.

 

[Hookeye]

The bone being hit is in an animal, made up of tissues and not rigid in station..........meaning there will be some give.

 

[firehawk1]

Some of the questions/comments could be answered by asking the developers of this product.

 

[buckwacker]

X amount of energy = Y amount of penetration as long as the medium remains the same. I'm pretty sure little sliders or other such gadgets won't change that. Actually some small amount of KE would be wasted as it would be converted to thermal energy through friction as the slider moves forward. I'm sure that's peanuts though.

 

[midget]

All those things do is try to privde a little energy impulse at the end.
personally I don't have a need for them. Right now, I know for a fact that my bow will send an arrow through about anything... Including my father in laws shed...

 

[Hookeye]

All those things do is try to privde a little energy impulse at the end.
personally I don't have a need for them. Right now, I know for a fact that my bow will send an arrow through about anything... Including my father in laws shed...

Impulse at the "end"............when you blow through the "end" is in the dirt

It's a sales gimmick.

New wave of bowhunters are psuedotechnical..............this preys upon them.

 

[buckwacker]

It doesn't "add" an impulse; that's a sales gimmick to make it sound as though the gadget creates energy. It simply steals energy from the time of initial impact and delays it a bit. Not going to help penetration.

 

[Cpt Caveman]

2 visitors to the site? I don't expect they'll retire off their earnings from this product.

 

[ADDICTED2TONE]

I'd have to shoot one with it and see what it did.. With todays small diameter arrows and as fast as bows are I can blow a rage thru a deer at 50 yards like a hot knife thru butter. This is interesting though..

 

[Hookeye]

Since the broadhead cuts a hole, tissue is elastic, and the fluids might offer some amount of lubrication..............please explain how a smaller diameter arrow helps in penetration based on its size? I doubt tissue "snap back" is so fast as to drag on the shaft.

Possibly stronger materials, less chance of crush at insert or deflection (= increased friction by side load).............smaller carbons might be of benefit. It aint because they're skinny alone.

Kills me how some advertisers of products use junk science.
I dunno. I blew through deer with aluminum and blow through with carbon.

But then I tune my gear for proper arrow flight....and run hunting weight arrows

I got into this with some statistics engineering guru some time back..........who informed me that when he pulled 2 different arrows, out of 2 different deer...........with 2 different broadheads.................that the smaller dia. arrow came out easier.

Made me just want to slap the sheite out of him.