Are you talking about plans for building a plane? If so, there are lots of them around. If you want old-time type aircraft, go the SAM (Society of Antique Modelers) web site. For electric, well, I'm sure the electric folks can steer you in that direction, as can the true builders here on RCU.

PM this guy and ask him: stickbuilder

He seems to be a spoke-sperson for building kits or models from scratch.

CGr.