Weight of arrow,weight of bow,draw length,speed,flecth,stored energy of bow,wind,tune,fletch length,fletch style,helical. I'm sure I missed something.
Speed is the biggest, and I would say aerodynamics/lift playing a supporting role. Gravity is constant, so if I can project an arrow faster, it still falls at the same rate, its just covering more horizontal distance and the drop and arc are perceived to be less. Lift from the point/broadhead, wind, rotation, and vanes and other aerodynamics come from the shaft rigidity (spine), arrow balance and rotation, a few vane brands/styles also use other 'secret sauce'.
Only two things.... Speed and Drag... everything else relates to those two. Gravity is a constant that is the same for everyone.
What everyone else said and the addition of FOC. I have found FOC and longer range 35+ trajectory to be related...
Never seen foc make a difference. Weight is weight. Atleast up to the 20% I've shot. Sent from my DROIDX using Tapatalk 2
Speed will be your biggest factor here. All other things (like weight and drag) are simply factors that affect speed. In order to achieve the flattest trajectory, you're tyring to prolong the affect of gravity, which is a constant. The faster you can move the arrow, the further you can distant it from the bow before gravity will have it's affect. I'm not sure if the purpose of the question is for an idea you want to try, or simply curiousity, but I've found that the setup that achieves maximum trajectory will not translate into a good hunting setup. A high speed bow with an arrow that is light as possible will be your best bet, however, it will produce no momentum that is needed for a good hunting setup.
I thought the same thing until someone said something to me once. so I took an two arrows that were the same weight, same length same fletching but one had about 15% more FOC than the other and past 35-40 yards the one with the added FOC dropped faster. I didn't believe it at first. I shot about 25 or 30 arrows and every one came to the same result.
well the reason I am asking is that I am shooting 6lbs more on my draw weight and I am shooting the same trajectory. I figured that would make a decent impact...
I would have to see it because that really does defy the laws of physics. How did the 2 arrows get to be the same weight.Weight tube?
With the same arrow? If so what might have happened is the turns were not exactly equal causing a difference in your tiller. That will cause the arrow to impact higher or lower depending on which way it is different than before.So even though your poundage changed,your arrow is pointed slightly different at launch.The pin gap should be different but you may not notice it much until longer distances. I will say that trajectory doesn't change nearly as much as people think with different speeds. One can change their speed by 20 fps and their pin gap will be VERY CLOSE. Move the housing so that the 40 yard pin is on and the 20 should be within an inch or two. Readjust the pins and you can't tell the difference,even on misjudged yardage.
I was very skeptical as you are at first too until I saw it. It doesn't make sense to me either as you are correct it defy's the laws f physics. One arrow had a 55gr brass insert with a 100gr FP and the other had a standard 11gr insert and a 85gr FP. They both weighed within 3 grains of each other and were the same length.
I am shooting a z7xtreme set at 70lb, 28.5 in draw, and I am shooting 5575 gold tips with 100gr field points coming in as a total of about 380grains per arrow.
