Brace height vs speed

[Sloppy Does]

Where is the most speed at in brace height? Closer to the reds gives you more power stroke. Farther from the reds preloads the limbs more. But which is faster and why?

[wildcatter]

There isn't going to be 2 or 3 fps difference that I have seen, and that definitely is meaningless even if it was 5! To me the best thing about setting it at 1" and not messing with it till it hits 3/4" or even 5/8" is I can't remember the last time I had to dick with it,,, and I don't care if I'm shooting balloons at 50 yards their dead!

My advise is to forget the meaningless difference it will make with speed, shorter power stroke with more weight seems to be a wash fort longer power stroke at less weight! But staying off them reds makes em last longer and like I said allowing some leeway for it to lengthen a little gives you less maintence and more shooting!

[Trentco1]

Interesting topic
One I was looking for.
Today I had my limb replaced on my micro 315. As the one limb delaminated and snapped off. The boys at Easton outdoors on hwy#115 where I purchased the bow took care of it pretty quick and had me back up and shoting in no time at all. The Adf was also malfunctioning and chewed up my blue string that came with it,so I had to do a little snippering at them as they said it's a wear part and no warrantee! I said it was the Adf that killed it and stude my ground,a little bit more bickering at them and they finally caved in and replaced it with a new green string. When I first purchased the bow about 4weeks ago they did all the set up for me and chronographed the quills that came with it and 100gr F.p going 327 fps The original blue string Was sitting back 2" from the riser where it meets The rail. The new green string that they put on today is closer to 1"inch from the riser and rail. So I asked the guy if he could chronograph The speed again This time he Got 315 fps That's a speed loss of 12fps. Does anyone know why?

[wildcatter]

Limbs are not the same deflection would do it, the other thing is the ADF doesn't malfunction and wear your string unless you are dryfireing it, That is the only time the string can contact the ADF except cocking it, if it is doing damage to the string cocking it, you would be having trouble getting the string past the ADF, it will do it to every string you put on it if thats the case, I recommend you stop dryfiring it as this is probably why you had the limb trouble. Just a guess!

[paulaboutform]

Limbs are not the same deflection would do it, the other thing is the ADF doesn't malfunction and wear your string unless you are dryfireing it, That is the only time the string can contact the ADF except cocking it, if it is doing damage to the string cocking it, you would be having trouble getting the string past the ADF, it will do it to every string you put on it if thats the case, I recommend you stop dryfiring it as this is probably why you had the limb trouble. Just a guess!

I thought the exact same thing. Seems like a fair assumption to me. There's no other way the ADF could damage a string other than in the event of a dry fire, intentional or not.

Paul

[8ptbuk]

Deleted post !

[Trentco1]

That's what the guys said at easthill that I must be dry fireing it. BUT NOT. The spring in the Adf wasn't working an the release would slide back an forth depending how you lift the bow. When I was shoting it the long weekend I had two darts fly about 10'feet and drop. That's when I noticed the Adf was messed up I needed to make sure it was pushed in as some how it would grab the string as the arrows were not going far. I'm 99% sure that the arrows were seated properly up against the string easthill said its not possible. I beg to differ. with the AdF catching my string would that be considered a dry fire?

[Kegbelly]

I did some extensive testing a couple years ago and I didn't see much difference in speed in relation to brace height, maybe a couple FPS gain at most with the string resting right against the REDS. The downside is you'll eat up the pads pretty fast, and there has been some discussion about brace hight being too low and causing the string near the loops to slap the limbs and possibly contributing to the limb tips breaking or coming off. Set the string 1/4" or better off the REDS and don't worry about the 2 FPS you're missing.

[Trentco1]

But I'm missing 12fps and that a lot;(

[Boo]

Maybe I misunderstand but, if your ADF catches your string, you have to be either dry-firing or semi dry-firing your bow. The string is lower than the end of the arrow and if seated properly, does not have a gap for the ADF arm to catch the string. Am I missing something?

[robertyb]

If your spring in the ADF is not working you need to have the ADF repaired.
When you shoot an arrow (not a dart) the arrow and string should clear the ADF at the same time as they are holding it in the UP position and there is no way it can fall until they have cleared it. The only time the spring is actually used is when decocking the bow and is used to lift the ADF so the string can be let down. When an arrow is shot and falls way short of the target it is usually caused by a partial dry fire which in turn is caused by not having the arrow set tight against the string. It might be possible to have a partial dry fire that would let the ADF fall in time to catch the string. Check your arrow tension spring and make certain it is not letting your arrow slip forward before shooting. Bend it downward to apply more pressure if needed. It also sounds like your ADF latches need polishing and probably your string latches also if damaging the servings.

[nchunterkw]

If your spring in the ADF is not working you need to have the ADF repaired.
When you shoot an arrow (not a dart) the arrow and string should clear the ADF at the same time as they are holding it in the UP position and there is no way it can fall until they have cleared it. The only time the spring is actually used is when decocking the bow and is used to lift the ADF so the string can be let down. When an arrow is shot and falls way short of the target it is usually caused by a partial dry fire which in turn is caused by not having the arrow set tight against the string. It might be possible to have a partial dry fire that would let the ADF fall in time to catch the string. Check your arrow tension spring and make certain it is not letting your arrow slip forward before shooting. Bend it downward to apply more pressure if needed. It also sounds like your ADF latches need polishing and probably your string latches also if damaging the servings.

I was thinking this or the string is slipping off the nock somehow. Are any fletchings on the arrows all messed up?

[sproulman]

I took picture to my local bow shop and they felt the broken limb could have been from dry firing a bow..But does not the ADF stop this on Excalibur bows?I dry fired my micro 335 1 time I thought arrow was in place ,no arrow..ADF did catch it ...On Horton I had no ADF and I did split left limb but it was small split ..

brace I keep it just beyond the brace marks which is like 1/4 inch from reds as you folks told me to do..I am filling in my brace marks with J B WELD ...\

[Trentco1]

I'm trying to replay everything back in my head after the arrow spit out,and the second one did the same. It was like what the hell just happened. then I noticed Adf system was malfunctioning. So it's possible that it was in the downcycle to catch the string. when I placed my arrow in the Rail it was actually hitting the ADF latch and not hitting the string err.
But just a maybe. Would that semi-dry fire cause my limb to fracture?
I also would still love to know why with the new brace hight/string why I'm loosing 12fps

[robertyb]

On the 12 fps loss you might simply have had a hot set of limbs at first. Some simply shoot faster than others depending on the limb deflection.