I made a 34#@26" D-tillered bendy-handle straight self bow (51" ntn) from a 22 mm thick (just under 1") rose branch last year
It checked badly but without twisting (I quick-dried it in a weak, that was asking for checking). By making the back opposite the crack it yielded just a basic decent "survival bow", after heat treating the belly over coals. Nothing exceptional, and took 1.5" set, mainly in one limb.
The crack is still visible in the center section, but doesn't seem to affect the bow's performance.
Joachim