Flight arrows

[Badger]

  Mark, I just looked at one of Adams graphs posted at paleo Planet with a bow of similar speed per grains of arrow weight per pound of draw weight. At 4 grains per pound( 200 grains) the bow was hitting about 260, at 5.5 grains per pound ( 275 grains) the bow dropped to about 220 fps. That seems to be the break off point where lower weights really have dramatic effects on speed.

[PatM]

Kviljio just got a sub 200gr arrow up to 299 out of his Turkish bow.

[Marc St Louis]

I don't know Steve.  Doesn't seem quite right to me.  Those graphs are for horn bows

I tried 220 grain arrows compared to the 275 grain arrows out of the same bow and they consistently fell short.  Could be a spine issue.  I'm sure there is a lot that can be improved on when it comes to arrows.  I should have kept detailed records when I was doing all that testing

[Badger]

Mark, I have similar results but I believe spine and bad takeoffs are the reason. If I shoot a not so fast skinny tipped longbow I get better distances from the light arrows.

[bradsmith2010]

thanks for the info,, I find it very interesting that fps does not always translate in the longest distance,,,,good luck to you guys that are competing, hope your arrow goes far,,

[Badger]

 Ivar made a post of facebook, a 236 grain arrow hit 252 fps and his 193 grain arrow hit 299 fps. 40 grains off arrow weight made a difference of speed of 47 fps. This is with a 65# bow. When you get into that 3 or 4 grains per pound range small changes in weight make large differences in speed.

[Kviljo]

I suspect this is mainly due to the shortness of the limbs of this bow. It is only 41 inches between the nocks, which will give it a lot of speed with very lightweight arrows. I bet there is not as much to gain by choosing a lighter arrow for longer bows.

- which tells me we should probably experiment with 40-inch long, wide limbed wooden bows.

[Lukasz Nawalny]

My engineer friend have made great program special for flight archery. Entertain for example temperaturę, air pressure, wind, type of bow, arrow speed, arrow diameter, fletching and give answer in % how compare arrow to bow

http://www.forum.arcus-lucznictwo.pl/download/file.php?id=2066&mode=view

[Badger]

  Do you have a way to translate that into english?

[Lukasz Nawalny]

I must ak him