Osage Orange Heat Treated 55#@28,5"

[Rowan Bows]

Jjipso wow thats really fast - yeah black locust seems to be a really fast wood. I scaled one in the video too 60lbs 51,5m/s ~171fps. maybe I should have made this Osage more narrow but Im fine with it. I wanted to point out that the heat treating made it much faster but maybe this wide shape is not so good for osage.

[bownarra]

Pretty cool look you've got there.
I aim for 170 - 175fps @ 10gpp from my selfbows. My best is just on 180fps @ 10 gpp.....but that isn't easy!! Laminated bows can be a bit faster but the difference ain't much. Also most modern glass bows ain't that fast when you get to testing them. I would suggest it is your tiller, bending a bit too much mid limb for best speed. Also maybe a little wide? But I haven't felt the piece of wood

[simk]

hey simk his arrows have only 380gn of course its fast

yes, correctly, 375-390gns. but of course it always has to be seen in relation to drawweight. I personally know this guy and if his drawlength is correct, he shot an 8,5gpp at 194 at a 26" draw. yours was 157 with a relativly lighter arrow. he personally knows a few guys that made a 190+fps at 10gpp selfbow. they however personally know guys that can make a arrow travel at the speed of light 
other question is durability of these bows - them extraordinary bows usually will loose some speed over time and finally settle in as only good bows. another very important factor when going for speed is your release. 
 

[Marc St Louis]

Good speed from a straight limb bow using 10 GPP arrows and a 28" draw should be around 170 fps and in some cases even close to 180 fps. 

The tillered shape of your bow limbs don't exactly match with the left limb in the full draw picture bending more in the inner limb while the right limb has a more even bend.  Perhaps this affects performance?

[Rowan Bows]

Ok ok its not very fast I got it guys but If I made a perfect half circle tiller I would have build a weak spot. one limb had reflex in the last 20cm.
I think the lack of speed has another reason but it would be nice if we could not only focus on the that - thanx!