
why do short limbs have Shorter Brace heights.
and does it effect accuracy?
Table taken from the Hoyt Manual page 25
http://hoyt.com/uploads/manuals/53e62bc2bd1c4094c6fabe17b1ef6cb5678268c9.pdf
good post well put.Are these questions being posed because you want a serious discussion or are they being asked because you are justifying the direction your company is going? And, I'm not asking that to he rude but because these threads generally seem to have a feel that you are trying to enlighten those of us too ignorant to know better and you aren't really interested in meaningful discourse. At least, that's the perception many people have and why these threads tend to turn negative and go sideways.
In the interest of having a serious discussion you can't quantify forgiveness but if you're bow doesn't have it you know. Forgiveness is a condition of having a good tune and a bow that doesn't punish mistakes. It is generally accepted that short brace heights (relative term) are less forgiving to shoot. There are two schools of thought on this. One is that short brace heights are faster and this means the arrow is off the string quicker which results in less shooter input. The other is a short brace (relative) has a longer power stroke and the shooter's input affects the shot more because the arrow is on the string for a greater length. Which is right?
Look at compounds for a minute. The prevalence of low brace bows was in a large part due to the push for speed over the last decade. Guys want more speed. When 340 fps was fast one year, the next year it wasn't enough. This led manufacturers to continue pushing the envelope in both cam design, reflex risers, and short brace heights. However, in the last few years, consumers have started asking for something different. People are asking for bows that have less aggressive cams, longer brace height, and more in line or deflexed risers. Why? Because the former designs were less fun to shoot, despite being fast, and people are discovering (or perhaps re-discovering) the less aggressive designs are easier to shoot with consistent accuracy.
Now, one other question a person has to ask in deciding if a low brace bow is for them is what their end game goals are. For hunting we want to hold a single shot accurately into a small area and we choose the distance we shoot. A low brace height bow, which may be faster, may work just fine for the person who knows and sticks within their limitations. A 3D or field archer is normally shooting longer distances and doesn't get to choose their shots. They take what is presented and and the goal is hitting a small bullseye at every distance. If you are trying to win you don't get points for extra speed, you get points for delivering pin point accurate shots.
In the target world do you see short brace bows being used at big tournaments often? Generally not. Why is that? It's the same on the traditional side and compound side. Why?
Does vertical stability or lateral stiffness guarantee better accuracy, regardless of brace? If so, how much of each is needed? Is there a point where there is too much and it causes backlash in the shot? Is forgiveness solely dependent on brace or is it a combination of all factors in the system?
If the arrows time on the string is particular to forgiveness, why do 32" draws not get punished?Compared to your brace limit, or restrictions, Hoyt is higher across the board, and therefore they start more forgiving. Because like Chris mentioned above, the longer the arrow is on the string, the more "perfect" an archers overall form must be. It's a law of physics that no one can work around. I mentioned all the facts Chris has layed out in another post of yours not long ago. Nothing has changed since then. Now I have a question, are you looking to replace the feel of a 70" bow when shot, since your 70" model is 64" at rest, how do you plan to replace that comfortable stable length we all know and love?
That's why we choose those, stability and feel. Are you expecting your limbs unfolding from 64" to 70" to provide that feeling? Using a long bow as an example for your plight, as you are clearly trying to shed favorable light on a low brace height that no target shooter desires in a recurve bow. A long bow moves in one axis not two like SR, so the long bow will always and forever be more forgiving by its design.
not everyone. there are plenty of target archers that are not part of the online community that shoot lower BH.A high brace, outside of the correct range, doesn't necessarily equate to more forgiveness or accuracy. A given design has a working envelope where the limb functions correctly and has its optimum amount of stability. Operating outside this range, on the high side, compresses the limb more and can reduce vertical stability. In a recurve it also opens the curves earlier which can reduce smoothness and speed.
So, comparing a 70" Hill style which is designed for a lower brace vs a 70" Olympic recurve with a much higher brace isn't really valid comparison. You have to compare like for like. If you want to compare longbows compare a Hill to a stealth D bow which normally presents a higher brace.
Now, with the more aggressive recurves things are a little different. The curves sit further forward at brace which means the limb will want to jack knife more (bigger lever). Ever wonder if people shoot out of spec (higher brace) on aggressive curves because it makes it behave more like a conventional recurve? Food for thought...
any occilation will even itself out. Give it long enough.Quote:
Originally Posted by Str8 Shooter View Post
Are these questions being posed because you want a serious discussion or are they being asked because you are justifying the direction your company is going? And, I'm not asking that to he rude but because these threads generally seem to have a feel that you are trying to enlighten those of us too ignorant to know better and you aren't really interested in meaningful discourse. At least, that's the perception many people have and why these threads tend to turn negative and go sideways.
In the interest of having a serious discussion you can't quantify forgiveness but if you're bow doesn't have it you know. Forgiveness is a condition of having a good tune and a bow that doesn't punish mistakes. It is generally accepted that short brace heights (relative term) are less forgiving to shoot. There are two schools of thought on this. One is that short brace heights are faster and this means the arrow is off the string quicker which results in less shooter input. The other is a short brace (relative) has a longer power stroke and the shooter's input affects the shot more because the arrow is on the string for a greater length. Which is right?
Look at compounds for a minute. The prevalence of low brace bows was in a large part due to the push for speed over the last decade. Guys want more speed. When 340 fps was fast one year, the next year it wasn't enough. This led manufacturers to continue pushing the envelope in both cam design, reflex risers, and short brace heights. However, in the last few years, consumers have started asking for something different. People are asking for bows that have less aggressive cams, longer brace height, and more in line or deflexed risers. Why? Because the former designs were less fun to shoot, despite being fast, and people are discovering (or perhaps re-discovering) the less aggressive designs are easier to shoot with consistent accuracy.
Now, one other question a person has to ask in deciding if a low brace bow is for them is what their end game goals are. For hunting we want to hold a single shot accurately into a small area and we choose the distance we shoot. A low brace height bow, which may be faster, may work just fine for the person who knows and sticks within their limitations. A 3D or field archer is normally shooting longer distances and doesn't get to choose their shots. They take what is presented and and the goal is hitting a small bullseye at every distance. If you are trying to win you don't get points for extra speed, you get points for delivering pin point accurate shots.
In the target world do you see short brace bows being used at big tournaments often? Generally not. Why is that? It's the same on the traditional side and compound side. Why?
Does vertical stability or lateral stiffness guarantee better accuracy, regardless of brace? If so, how much of each is needed? Is there a point where there is too much and it causes backlash in the shot? Is forgiveness solely dependent on brace or is it a combination of all factors in the system?
In regards to the second paragraph, I've seen it argued that the point made about the arrow being "off the string quicker" associated with higher BH, not lower...i.e. the closer the string is to the riser when it detaches the later the arrow can complete the necessary gyrations required for paradox. Maybe "sooner" would be a better desciptor than "quicker". I'm obviously not a technoweenie, but I do concur with the crowd that claim lower BH will make dynamic spine of a given arrow act slightly stiffer and raising it will make it slightly weaker due to earlier release. I will concede that if you ask this question on most less-technical oriented websites you will always get near 50-50 responses from the "power stroke" adherents vs. the "release point" crowd. I think it's notable that if we were in the 1% of those whose form was good enough that we'd notice these changes the point wouldn't even be debatable, lo!
Well said.I have a <29" draw but shoot a 70" bow because it is more accurate and forgiving. I think that is likely due to the brace height and in fact I think the string angle is working against my face shape to some degree.
I've shot 66-70" bows with BH from 6.75-9.5", the low BH combo shot the worst consistently. Things start to get better past 8" and seem to peak at 9" but I'll merrily shoot a 9.5" BH for indoors.
Some bows are not forgiving and can make you question your abilities. No performance is free. It's when you ask for support from the manufacturer and get told that it's your abilities at fault and not a compromise in the design of the product that I have issues.
Grant