FAA handbook AC43.13 tells it all. I think there's a new version out now. Darrel -----Original Message----- From: Edward Nolan <artsfoto@yahoo.com> To: FlyBaby@listbot.com <FlyBaby@listbot.com>; woodplanes@northwest-aero.com <woodplanes@northwest-aero.com> Date: Tuesday, November 16, 1999 11:22 AM Subject: Wood Grain Orientation/Scarfs >FlyBaby > >Hi, > >Is there a "rule" for grain orientation when the >length of the spruce (say 16' longeron) and the height >and width of the piece are square? As glued to the >fuselge side, should the grain run paralled to the >side of the fuselage or can it be--relatively >speaking-- perpendicular (obviously depending on the >grain's slope)? Is their a strength difference >between orientations? How about for vertical members >that connect bottom and top longerons? > >Also, if plans call for a 16:1 scarf joint, does that >mean that the scarf should be 16 X the thickness of >the piece of wood? Example: 1/8" ply X 16 =index.html 2", so >the overlap of the two pieces should reach back a full >2" from the edge of each piece? > >Is there a good resource for general information such >as this? > >I know these are very basic questions, but I'm new to >the game. > >Thanks. > >Ed > > > > >