Indeed, do you own experiments, draw your own conclusions.
You may find this post from my blog interesting.
https://bowyersdiary.blogspot.com/2011/11/mass-velocity-and-energy.html
Del
Thank you del. The relationship between arrow weight and efficiency is well established but I always like graphs. What I am interested in as mentioned, is the relationship between draw length, bow length, arrow weight, and efficiency. For example, we know that a longer draw length stores more energy, but we also know in the case of ELBs, longer bows are more inefficient. So the question is, how fast would a longer ELB drawn to 32", compare to a shorter ELB drawn to 28"? And as I mentioned, I am wondering if the advantage of longer draw length only shows a benefit with heavier arrows, as Joe Gibb's test with relatively light arrows did not seem to yield any benefit drawing from 28" to 30". I have been doing some more research which does seem to support the idea that longer draw lengths are better with heavier arrows in terms of GPP, eg., bows like yumi or Chinese manchu bows with very long draw lengths of 35" or more do very well with arrows of 15gpp or even higher, often shooting them over 170fps . Meanwhile Turkish flight bows optimised to shoot light arrows over 300fps and only have draw lengths of around 28"
I would like to do my own experiments but I don't have the resources right now. This forum has a lot of great info I've been reading but it seems dead now. I assume the warbow scene is still active, is there any place still on the internet for warbow archers to talk that isn't a facebook group?