Hey Joren haven't heard from you for a long time. Anyway i do have a peice of low ring per inch elm which is good as i want a self bow.
Hi nick,
I strongly sugest you dont make a self bow from elm. According to my teacher a elm self bow is possible
but only with low grow rings per inch(which isnt suitable for warbows) find yourself a niece piece of ash/hickory
to back it. really dont waste your elm on that(I can know I got a self elm bow with a crack of 15inches).
Heya
May I question your teacher's thoughts? Elm is very proven selfbow wood, it needs no backing at all and even used for backing other wood. Only elm that would need backing wood maybe be from a board with bad grain or damaged back. Very strong in the tensile strength and the grain is much interlocked, making a even tougher wood. I only can think of one elm that not so good for bow and that is Siberian elm, maybe it has lower density.
You may find many elm selfbow here on forum and elsewhere.
For warbow, Thimosabv has created quite a bit of heavy warbows with round bellies from the elm wood, most had no set at all and being in the 100+ draw weight range. His elm had high ring count per inch as well, grew very slowly and produced a very dense wood.