Seeking Force Characteristics Fastest Cammed Compound Bows

Talk to wheel bow makers.

Don't ask Del, because he's a purist. His bows don't have wheels. They have wood and gut.

Model it.

Are you in over your head?

Hi lyn;

That is a great idea. Should have thought of it sooner. I will send emails out to bow manufacturers tomorrow.

Regarding being over my head, not quit. I used the formula Mercer University provided and extrapolated based on that. However, moderned camed compound bow have a more complicated release mechanism and probably a more complicated force characteristic, and so I will probably need to talk to the specific manufacturers of bows with the highest release velocities.

Thanks for the advice.

Regards;

Jim

You can calculate till the cows come home, but the proof will be known only after you shoot some arrows through a chronograph.

Good luck.

... but the proof will be known only after you shoot some arrows through a chronograph.

So, does the photo, which I can't open, show a chronograph with an arrow through it ala Del?

How about this one?

More like this→ Shooting Chrony Beta FPS Bullet & Paintba...

$109.94

Source:e-bay

No, sorry... my mistake for not stating.

The image I posted was a .jpg of the image posted by Ken in #5. I used to have a Skyscreen, can't remember what happened to it.

I am curious as to what our friend Jim is really up to.

Thanks, I couldn't open it, but I suspected such, given the way I worded it.

Was that LeeRoy Mercer University? How big an ol' boy are you?

It's based on ∫₀^release F(x) dx, where F(x) is a probably complicated function depending on cam shapes, moving bowstring angles, number of pulleys, etc.

This project of yours... you say unrelated to hunting. Is it related to a bow, or just the mechanics of a compound bow?

Most of the hunting/target bows available seem to emphasize the overall length of the bow being short. If you are not as restricted by this, then limb length may well also be a valid point of investigation.

Hi Folks;

Thanks for all of the comments and advice, Doorman, I am interested in the mechanics of the bow but want to use camed compound bows as an exampler system since they already exist and are well understood. But indeed, I can imagine that arm length could have a significant impact on release velocity.

Thanks;

Jim

The pulling strength of the archer is also significant: perhaps you'd be better looking at crossbows.

A friend of mine, who is an avid bow hunter,both recurve and compound, swears that a recurve bow has a faster time from "release to target" then a compound of even a higher draw weight.Even though the recurve velocity attained may be higher, it has a stepped acceleration from time of release due to the cam action, whereas a recurve has a quicker, steeper acceleration curve.Like a 1/4 mile dragster, that gets the hole shot on a faster car,but beats it to the finish line,with a lower top speed, but a lower ET.

Anyone else share this observation, or is my friend mistaken?

I can't see why anybody would pay a premium price, get something far more complex, and lug something that is twice as heavy through the woods unless there was a demonstrable advantage to doing it.

Or, is the only advantage, the reduced draw and hold force required with a wheel bow?

I don't know.

Hi All,

I worked closely with a major manufacturer of compound bows, a company that has manufactured 340 fps+ products. I can tell you this, there is a lot more to making those machines the best in the industry than just raw speed. That being said, you may get an idea from this TED clip. http://www.ted.com/talks/sheila_patek_clocks_the_fastest_animals.html

speed is one thing, stealth is another thing entirely. Try an atlatl, and a short spear.

The advantages and disadvantages of compound bows is found here.

I would be interested in viewing a chart of Elapsed-Time-To Target from Moment-of-Release of both compound and recurve bows of similar draw weight and arrow weight.

I know the compound will reach a higher maximum speed,and have better penetration as a result, but that does not mean it will get to the target quicker from the instant of release.

This is the factor my friend was referring to when he claimed the arrow from the recurve would arrive at the target before the arrow from the compound.

I have seen charts of acceleration,speed and distance for the compound, but not a direct comparison of the two using the criteria I mentioned.

Anyone need a research project?