Brodhead Pietenpol Association

As you can see on the vertical fin plans, it calls out for 3/16 plywood to be installed under "fittings". What are the "fittings" to which the plans are referencing? Does the 3/16 plywood go under the gussett or under the angle that attaches the fin to the fuselage?

I see now the angles are called "fittings" in the plans.....

Yep, good figuring.

Fittings are generally steel parts. They are the things that attach two (or more) distinct parts, like horizontal stabilizer to vertical stabilizer, wing to diagonal struts, center section to cabane struts, fuselage to engine mount, etc. There will almost always be plywood under the fittings to give them a substantial substrate for bolts and nuts to be firmly cinched together without digging into much softer sitka wood members.

Keep asking questions. The plans will become clearer and clearer the further you go with your build.

Cheers, Ken