Abstract: A rotor blade includes an airfoil having an airfoil shape. The airfoil shape has a nominal profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in one of Table I, Table II, Table III, Table IV, Table V, Table VI, Table VII, Table VIII, or Table IX. The Cartesian coordinate values of X, Y and Z are non-dimensional values from 0% to 100% convertible to dimensional distances expressed in a unit of distance by multiplying the Cartesian coordinate values of X, Y and Z by a scaling factor of the airfoil in the unit of distance. The X and Y values, when connected by smooth continuing arcs, define airfoil profile sections at each Z value. The airfoil profile sections at Z values are joined smoothly with one another to form a complete airfoil shape.

Abstract: A scintillation article including a scintillation detector coupled to a photomultiplier tube (PMT) housing, and a PMT assembly disposed within the PMT housing. The scintillation article further includes a cap assembly selectively coupled to the PMT assembly, wherein upon moving the cap assembly from an assembled position in which the cap assembly is engaged with the housing to an extracted position in which the cap assembly is disengaged and removed from the housing, the cap assembly mechanically engages the PMT assembly and extracts the PMT assembly from the PMT housing.