Hello, I have some questions about different bow designs.
If I have understand right a normal compound bow have a draw ratio to 1 to 2 so the 150lb limbs give a 75lb draw and only travel half of the length of the string.
And a longbow/slingshot have a draw that get higher the longer you draw it, but a compound have cams that get the full draw weight faster, so instead of having a 75lb at 30 inches on the end the compound have it already at 5 inch?
This is what makes a compound shot fast? right or wrong?
Btw why have compound bows so low draw weight? I have never seen one over 100lb in draw
which of these bow designs which will be fastest do you think?
All have same draw length and draw weight.
1. recurve bow
2. normal slingbow
3. lever operated bow (which ratio limb to draw length is best for a leveraction bow?)
4. pulley bow (no cams) 2 pulleys 2 to 1 ratio or 4 pulleys at 4 to 1 ratio.
5. some other design I have not thought of? I are open for all suggestions on how one can get more power.
If looking at the slingshot channel most of the crossbows/slingshots seems to be direct powered and dont have any mechanical assistance at all, must be a reason for a man with so skilled craftsmanship as Jörg Sprave to not using it
What is best, rubber or leaf-springs or coil-springs or vacuum as powersource for a arrow launcher?
I have also thought of putting the riser behind the string so I get a longer power stroke, how far back from the sting can i have it before it gets unstable do you imagine?
I thinking of building a compact bow (backpack size) in 50lb to 100lb draw weight and possibly a reverse draw.
Also maybe only using one limb/spring/rubber instead of 2 and split the power from it would work??
But if the performance is much better with a big bow then the size dont matter much.
I am very grateful for all answers
Sincerely Jim H.