Bamboo Propellers

"Stealth Pilot" wrote

well when that prop was shattered in a wheels up landing of the
sidlinger hurricane it was on, not one part of the curly grain had let
go. no glue breaks in the curly grain. no breaks of any type in the
curly grain area. all the breaks were in the adjoining straight
grained sections at radiuses either side of the wrong grained wood.


If the curly wood is in the middle of the prop blank, or carved section of the
blade, it is only taking up the centripetal forces (I know, they don't exist)
and not any bending load. It is only serving to hold the outer sections away
from each other, like the web in an I beam.
--
Jim in NC