Main Discussion Area > Flight Bows
Virtual Mass revisited
DC:
I'm going to do this test again with a couple of shots for each weight. The 548 was a definite jog in the graph. The 650 is just an arrow that I threw together to get a heavy one. It doesn't have any fletching and hit the target sideways. I think I got an error on the second chrono with it.
DC:
I did it again and the changes aren't worth typing. The 548 dropped 4fps and the 667(fletched added 4 grains) came up by 2 fps. My second chrono seems to be about 5 fps slower for some reason.
I guess that spot in the bag got a little soft :-[ :-[ :-[ :-[
sleek:
--- Quote from: DC on September 29, 2020, 12:23:15 pm ---I did it again and the changes aren't worth typing. The 548 dropped 4fps and the 667(fletched added 4 grains) came up by 2 fps. My second chrono seems to be about 5 fps slower for some reason.
I guess that spot in the bag got a little soft :-[ :-[ :-[ :-[
--- End quote ---
Consider that the weight of the arrow allows the harmonics ( wave theory ) of the bow to be maximized. That weight arrow 548 grain, allows the return wave of the bow limbs to perfectly sync up, delivering the most efficient energy flow possible.
In support of this consider an off balance tire. It will vibrate worse up to a certain speed and then smooths out to be unnoticeable at a specific rpm, then as you pass that rpm range you get bad vibrations again. All these other arrows don't allow your bow to be in its proper vibration range. But the one heavily arrow puts it right there, picking up ALL the bows energy.
I know its just a theory of mine, but it explains a lot, and has worked for me in getting good performance from my bows. Also, there is usually 2 ranges that fall 180° ( i think ) from eachother that allow good performance. You may find another arrow weight that also joggles the graph, either by more or less, but i dont think the same amount as this arrow.
DC:
It is strange. I've run the test twice and even with the the readings from the second chrono being different that hump for the 548 one is there. If your wave theory is right wouldn't you think that the 556 one would show some improvement?
The 501,548 and 556 are all the same Tiger shafts. the 501 and 556 are both 60# spine and the 548 is 55#. Could that one be getting a cleaner launch?
I think I'll sand down the 556 to 55# spine. I'll take 5 shots before and 5 shots after.
sleek:
That 550 arrow has 47.87 foot pounds of energy, which is more than the heavier arrow has at 44.19 foot pounds with 650 grains. If it were only hysteresis as an energy loss factor, this energy difference wouldn't make any sense. For certain, sometimes else is working to allow this random arrow to absorb more energy contrary to standard thought.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version