I have just read through some of those atlatl articles. Wow! That math is amazing, and if true should make archery enthusiasts sit up and get out pencils and paper to calculate the best arrow designs to go with their bow. But how many of us know about cosh functions?
But the idea that the projectile takes up and then releases tension energy back to kinetic energy during the act of throwing is a fab concept. I guess you could apply the same concept to the throwing stick (atlatl) as well - bending and straightening during the throw.
I think the frog has been proven to use this concept in its jumps - there are springy tissues in the muscles that take up energy at the start of the push off and then release it again at the end of the push off.
So if I wanted to apply that bending/ straightening action in the shaft of an arrow how would I go about designing my arrow? I would need a heavy point to the arrow, and a flexible arrow shaft. I wonder if in fact the shaft should then be slightly bent so as to be sure to bend more during the firing.
Richard, London, UK
If at first you don't succeed - pause, reflect, change something and try again.