I have lots of experience with BL heartwood. Has anyone else notice that BL growing in waste ares with topsoil scraped off, such as around a retention pond, has a generally different aspect than forest BL? It is thornier when young and looks more like Acacia, grows incredibly fast. I cut one down in such a setting two years ago, 4" in diameter debarked, over 1/4" think rings of sapwood and only 1 inch thucj area heartwood in center. Even with that sapwood, the staves feel very heavy, and I was thinking about trying one designed like a white wood. 1 3/4" wide. I made a sapling bow with rounded cross section of one just 1.5 inch diameter a couple years ago, all sapwood, and it was very sturdy.
I just finished a BL board static recurve, backed with hemp. I guess I'll get some pics together.
Too much bowyering, slowing down on my writing. Must be spring fever
Dave