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Heavy arrow (525gr+) speed reference list

slonstdy said:
View attachment 62461
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haha. Let me rephrase. They’ll be pretty accurate to
Probably 5-600gr. When you get into 700+Gr arrows, cams will start to have differences in efficiency that matter.

maybe you up the minimum bar to 700!

Now, if you developed an app that had a database of these inputs, and it leveraged way more people, and way more organized data, that could be interesting. Right now it’s still anecdotal. But if it was useful enough to take the information and spit out efficient “not this year’s flagship bow that cost 2000.00”, people could use it to buy used bows that do what they need.

I’d pay a buck for that!

it also makes me wonder if the bow companies have efficiency curves of these cams modeled. Arrow weight is way downstream of information that probably exists. Would be a good marketing angle right now in the heavy arrow Ashby cool guy stuff to offer a bow cam that is specifically designed to shoot heavies.

then I think, I’m pretty sure it’s easy enough to design a modular cam that is efficient with heavies, and the connection to different limbs can be swapped in to make them work with any bow. Sell retrofit cams.

ok I’m done. Back to numbers! Sorry!
 
slonstdy said:
That would be great info to have here! Do you remember which thread?
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No but here’s a screen shot of the data
5768d69283162586ee6162094b109d2d.jpg



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Red Beard said:
PRIME Centergy
27 1/4" @ 53lbs
607gr TAW
Assume ~240fps since that it the EZV insert I use out to 40yds

Morisson Phoenix stickbow with double carbon limbs
27 1/4" @ 43lbs
535gr TAW
Need to go over to @Gator's house so I can figure how fast it is shooting :tearsofjoy:
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Unfortunately the chrono was borrowed


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11ECA497-2DBA-4C27-9776-2287AB19F9D5.jpegI never would have believed those on line calculators were correct but evidently they are really really close
 
kyler1945 said:
it also makes me wonder if the bow companies have efficiency curves of these cams modeled. Arrow weight is way downstream of information that probably exists. Would be a good marketing angle right now in the heavy arrow Ashby cool guy stuff to offer a bow cam that is specifically designed to shoot heavies.
then I think, I’m pretty sure it’s easy enough to design a modular cam that is efficient with heavies, and the connection to different limbs can be swapped in to make them work with any bow. Sell retrofit cams.
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Or they could just make retro-fit new mods for existing cams not even a whole new cam to make the limbs work more. For example, Matthews, PSE and others "performance vs comfort" settings on their cams just adjusts for how much more or less you're making the limb work. I'm thinking that is an arena the manufacturers could look at more.
 
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@kyler1945 and @woodsdog2 I agree it would be cool to design heavy specific bows or cam systems. But as I think this through, the bow would need a way to displace a lot of kinetic energy. Trad bow users were using higher FOC for centuries. They didn’t require special bows so much as an understanding of trajectories and also how to maximize momentum at impact.
Compound bows are extremely fast compared to trad bows and even recurves. Taller longer bows with more draw weight shoot faster (usually) in the trad world. In the compound world the cam system and riser height effect speed more than any thing else besides arrow weight. Let’s say they do create a bow specifically for heavy builds with higher FOC, would the bow also need to be 36”or longer to take some pressure off the limbs? Would the draw weight have to be a minimum of 70 or even 80 lbs to make sure that any arrow 550 g or higher can break the 300 FPS marker? And if they did that, what would the arrows have to be made of? Lol because the faster the arrow flies, the stiffer it would need to be with that much weight up front. I’m already stuck shooting 200 spine. I don’t think everyone would want to go to 250 or larger just to get good arrow flight, and I don’t think everyone would want to pull back 70 or 80 lbs to get that type of speed. Heck if they made an 80 lbs dw bow that would zip 650 or 700 grain arrows at 300fps or more I still wouldn’t buy it because at my draw length, I couldn’t get an arrow stiff enough to bare shaft.
Lol we would all be shooting titanium arrows @ $40 per arrow:sweatsmile:
 
Fl Canopy Stalker said:
@kyler1945 and @woodsdog2 I agree it would be cool to design heavy specific bows or cam systems. But as I think this through, the bow would need a way to displace a lot of kinetic energy. Trad bow users were using higher FOC for centuries. They didn’t require special bows so much as an understanding of trajectories and also how to maximize momentum at impact.
Compound bows are extremely fast compared to trad bows and even recurves. Taller longer bows with more draw weight shoot faster (usually) in the trad world. In the compound world the cam system and riser height effect speed more than any thing else besides arrow weight. Let’s say they do create a bow specifically for heavy builds with higher FOC, would the bow also need to be 36”or longer to take some pressure off the limbs? Would the draw weight have to be a minimum of 70 or even 80 lbs to make sure that any arrow 550 g or higher can break the 300 FPS marker? And if they did that, what would the arrows have to be made of? Lol because the faster the arrow flies, the stiffer it would need to be with that much weight up front. I’m already stuck shooting 200 spine. I don’t think everyone would want to go to 250 or larger just to get good arrow flight, and I don’t think everyone would want to pull back 70 or 80 lbs to get that type of speed. Heck if they made an 80 lbs dw bow that would zip 650 or 700 grain arrows at 300fps or more I still wouldn’t buy it because at my draw length, I couldn’t get an arrow stiff enough to bare shaft.
Lol we would all be shooting titanium arrows @ $40 per arrow:sweatsmile:
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You are right, and I wouldn't buy one either. If a bow company did come out with something like that it would be an accident since I would bet their intention would be to drive a 350 grain arrow past the sound barrier. The best way they have found to convince guys they need the new flagship bow every year is to convince them the bow they bought last year is hopelessly slow, lol.
 
Fl Canopy Stalker said:
@kyler1945 and @woodsdog2 I agree it would be cool to design heavy specific bows or cam systems. But as I think this through, the bow would need a way to displace a lot of kinetic energy. Trad bow users were using higher FOC for centuries. They didn’t require special bows so much as an understanding of trajectories and also how to maximize momentum at impact.
Compound bows are extremely fast compared to trad bows and even recurves. Taller longer bows with more draw weight shoot faster (usually) in the trad world. In the compound world the cam system and riser height effect speed more than any thing else besides arrow weight. Let’s say they do create a bow specifically for heavy builds with higher FOC, would the bow also need to be 36”or longer to take some pressure off the limbs? Would the draw weight have to be a minimum of 70 or even 80 lbs to make sure that any arrow 550 g or higher can break the 300 FPS marker? And if they did that, what would the arrows have to be made of? Lol because the faster the arrow flies, the stiffer it would need to be with that much weight up front. I’m already stuck shooting 200 spine. I don’t think everyone would want to go to 250 or larger just to get good arrow flight, and I don’t think everyone would want to pull back 70 or 80 lbs to get that type of speed. Heck if they made an 80 lbs dw bow that would zip 650 or 700 grain arrows at 300fps or more I still wouldn’t buy it because at my draw length, I couldn’t get an arrow stiff enough to bare shaft.
Lol we would all be shooting titanium arrows @ $40 per arrow:sweatsmile:
Click to expand...
I completely get what you're saying. In my simple mind I'm thinking incremental changes or adjustments to existing platforms and design technologies to maximize potential energy storage. I'm looking at the multiple fulcrum and lever principles employed in crossbow systems or stop-latch mods almost like a gear that begins to store energy for the first 12-15" of DL more efficiently either by angle, materials, material thicknesses or both and then to enhance letoff, employs an additional cam to accommodate and perhaps soften the intense breakover that would be felt during the draw cycle. I'm just babbling out loud about things I really do not have any clue about but it's neat to dream about possibilities.
 
woodsdog2 said:
I completely get what you're saying. In my simple mind I'm thinking incremental changes or adjustments to existing platforms and design technologies to maximize potential energy storage. I'm looking at the multiple fulcrum and lever principles employed in crossbow systems or stop-latch mods almost like a gear that begins to store energy for the first 12-15" of DL more efficiently either by angle, materials, material thicknesses or both and then to enhance letoff, employs an additional cam to accommodate and perhaps soften the intense breakover that would be felt during the draw cycle. I'm just babbling out loud about things I really do not have any clue about but it's neat to dream about possibilities.
Click to expand...
That would be interesting as well, additional leverage or pulley system to assist the cam during the draw cycle. I wonder how it would effect the release though? Speaking of crossbows, they make some single bevels for crossbows, so you can turn your 20” bolt into a lean mean High FOC machine as well lol although it would be fun adjusting the scope for that new trajectory path lol
 
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