over-the-tip stringing

[godfreymik]

The speed difference represents only about 3ft#'s, but it is over a 20% jump in power. Would you mind doing a force draw curve on those two set ups, at least the last 4" or so.

I don't know the particulars of this.  Draw force on one axis and draw length on the other?  I ended up splitting one tip with the string, so I am in the process of applying deer antler tips before further experimentation.  I will try determining that curve after the tips are healed.

[pierce_schmeichel]

Hey, Godfreymik,

It's nice to see someone is furthing the research on my idea haha! I love it! I found the same exact thing in my tests. I found that the longer bows did not improve very much at all but the short ones did a fair amount.
Also I noticed you said you had issues with one of them splitting. To prevent that from happening wrap sinew around the nock in a perpendicular fashion relative to the bow. It will hold those fibers tightly together and will eliminate the possibility of it splitting.

I have one more tip for stringing the bow more easily but it's tricky to explain so I am going to attach a video when I get home tonight

[godfreymik]

I finished repairing the split tip and added deer antler tips.  This lengthens the bow about 3/8".  As I didn't think to change the string, the brace was increased by 1/2" to 6"  The thing that amazed me is the speed this is now shooting with the same 20 g. arrow. I got 150.9, 149.8, 149.9.  Then I must have drawn past 22", because it shot 153.9.  A higher brace shouldn't make it faster, just nicer to shoot, right?  In any case, I think I will build another with the tips only designed for over-the-tip.  Here are some photos and the table of draw length and weight. The tips are kind of mangled due to being changed so many times.

[bentstick54]

In your last photo, it looks like there may be some excessive string wear. If so, that may be the reason it’s not done on a regular basis.

[godfreymik]

Another reason they have not become popular is that they are REALLY difficult to string without an aid.  I ended up using a bow stringer on a tillering board.  Once the bow is bent, it is easy.  Stringing it without an aid is difficult and not fast.

I would be interested to learn how pierce_schmeiche stringed his bows.

[pierce_schmeichel]

Here's a link to the video! I hope this helps!

https://quickshare.samsungcloud.com/pVAtQVVvbzsj