Hickory can make a long, narrow, deep bow but it takes some patience and very careful tillering or it can take a lot of set. I built bendy handle awhile back that was 68" long and 1" wide in the center and tapered to 3/8" tips. Heat-treated the belly and after a lot of shooting it still holds an inch of reflex when unstrung. I'll see if I can find a pic of it and post it on here later.