Cat 7 “Variable geometry airfoils”

Airfoil-to-disk blade combinations using solid state joining;

Airfoil-to-disk blade combinations using solid state joining;

"Technology" for single-step pack cementation of solid airfoils is not controlled by Category 2.

Rotor blades incorporating "variable geometry airfoils" for use in systems using individual blade control.

Rotor blades incorporating “variable geometry airfoils” for use in systems using individual blade control.

For the purposes of 9.E.3.c., incidence angle is measured from a plane tangential to the airfoil surface at the point where the hole axis enters the airfoil surface.

For the purposes of 9.E.3.c., incidence angle is measured from a plane tangential to the airfoil surface at the point where the hole axis enters the airfoil surface.

Tools, dies or fixtures for the solid state joining of "superalloy", titanium or intermetallic airfoil-to-disk combinations described in 9.E.3.a.3. or 9.E.3.a.6. for gas turbines.