run out/off

[hova]

ok , so after the last one blew , it was told to me that my problems have been runout/off.

so far everyone says this is where the grain goes off the stave , but i dont see how its possible to do a board style bow , without runoff. its kind of like telling a one legged man not to hobble...


so heres a pic , to show what im confused about. even if you have perfectly even , straight grain from one end to the other , how on earth are you supposed to cut into it , and not have runout/off...

 


see what i am asking?

also , whats the difference in runout and runoff?


thanks guys

-hov

[fujimo]

there will always be marginal run off as you taper the board- sides of the bow, but you want the majority of the grain / fibres  to run the full length of the bow.
hence the reason why staves are split and not sawn.
and nearer the center of the bow, where the leverage is at its greatest, is where you have the majority of the good straight grain.
hickory is more forgiving than most other woods with regards to run off.
my interpretation of run off and run out.
run off, runs off the side of the bow.
where run out, runs out the back of the board, in otherwords towards the outside of the "tree".
in the wrong place that can cause wood to lift.
otherwise back the bow.- that will really help

[Aznboi3644]

All four sides of a board must have straight grain.

A 1x2 board can look perfectly straight on the back and belly but the side grain can be running off from the belly to back..These are boards sawn from twisted trees.

[hova]

fuji : i get what you mean about lifting , and thanks for confirming what i was thinking , that you will always have runout on a board style. its just to what degree...


azn : twisting is obvious to me. i just meant the grain lines that are straight. you always hear that you dont want runup or runout. the last one had grain that twisted a little , but it had been removed , and was down to two main rings , and then a slight run. i think if i wouldnt have pulled it like a jackass , i wouldve been able to nurse a bow from it.


as a side note , when i see guys cutting strips , flipping them , and gluing them on as backing , i wonder how some of them never lift , as they can look pretty messed up grain-wise...


-hov

[vanillabear?]

[hova]

well that helps a bit. the last bow had a bit of twist on the belly side. i looked a bit more at my pictures , and it looks like that may have been the issue. the back was all straight , it was just the one limb that had a little grain twist in it . i take it the grain in that pic of yours has some twist in it?


what did you end up doing with that one?

[vanillabear?]

[hova]

yeah , other than this white oak i have , the next one might be a hickory , if i get a handle straight enough or not...


-hov