Draw length, and poundage would help . I have made quite a few bows from Birch. 58 to 62 inches long, and 35 to 47 lbs. at 25 inches of draw. I made mine 1 and 1/2 to 2 inches at the fades to to 1/2 to 5/8 at the tips. Straight taper. Over all average bow weight with the string is 15 to 16 ozs. when finished. Handles are 4 to 4,and 1/2 inches long non working with slightly flipped tips that end up zero to 1 inch of reflex. Put on a form , and heated treated, and then more heat treat during the tillering process. 8 strand D97 string. They draw smooth. The last one I made at 38 lbs 25 inches of draw with a 400 gr. arrow shot 151 fps average. It is a soft hard wood, and easy to work with, but dings easily. Not as durable as Hickory, Elm , Osage etc, because of it's properties, but can make a good bow. As Pat B said make the first couple Paul Comstock style.
