How long would the staff of a composite bow be for a 28" draw?

Wow. That is quite an undertaking. I have an old, left handed Ben Pearson BP-52 7329 that is rated at 50 pounds at 28”. It is called 52 inches but when unstrung and sitting on the floor its length is 47 inches. It is a hunting bow that takes a fair amount of strength to pull. I’m guessing you are thinking about something that will not be used in the field but will instead be passed down for generations – but still be functional. I would recommend a longer bow with a lighter pull. Even 20 pounds. I also have a 62” 40# and 60” 25#. All are recurves. They look beautiful but sadly I consider them wall hangers.
Modern compounds have taken over. Ugly, brutish but they sure are functional. Mine is adjustable from 40 to 60# with an 80% let-off.
If you want photos or more precise measurements PM me.

Thank you LuckyGuy, Yes I am looking to make a bow that will last through out the generations. My Father works in manufacturing and has arms and back muscles you couldn’t believe, so for him it would be utilitarian, for me whence I get it back someday, probably a wall ornament. May I Inquire at the draw of the 62” 40# bow? The 47” seems to short for the design, and 25# seems to light for my Father. I have also tried to offer him one of the three compounds I have, but he always says, “No, no, I need a composite bow. You know, like the one Odysseus owned in the Odyssey. So that is close to what I am trying to make.

@Tiercel The Ben Pearson is a black composite. The short length supposedly makes it easier to control and carry in the woods. It also means the bow has to flex a lot. It must be designed well and had to have really pushed the limits of the materials at the time, late 60s early 70s. Holding 50# quietly was difficult for me. Now with my compound fitted with a wild cam I only need to hold 10#. Easy. And there is no bow recoil since they move apart (up and down) when released. And it is silent. And every shot is the same. And the fiber optic sight is aligned perfectly, as is the laser on the counterbalancer.

I’ll be honest with you. Those old bows – and the thought of delamination – scare me. Heck, the thought of wood arrows scares me. The forces are so great now you need very special wood.
The 62” 40# is from the same era. It is an Indian Archery, Seneca 264–62. (Ser #F25xx)
You can find pics of that model anywhere. They are cheap now since more people are shooting compounds. There is no printed draw length on the bow. Since I am the shooter the draw is the same for everything I use. 28” ;-)
You are a brave guy to attempt this.