I just finished an 69" Ash flatbow, I made a 4 inch handle, 3 inch fades on both sides of the handle then kept it nearly 2" wide for 14 inches, then tapered to thin tips... It came out to be a pretty slow bow though......i am assuming due to incorrect MC though..
I have a 20" diameter 25 ft ash trunk that i need to get some more staves out of...it is laying over off the ground now...hopefully I can try to cut it up this weekend!...I assume it is white ash.