Ashes	Hawc2 equivalence	Comment
BladeFraction	r/blade_length	Ashes gives the data normalised against the blade length whereas Hawc2 gives absolute data
StrctTwist	pitch
BMassDen	m	see note below
FlpStff	I_y * E	Hawc2 gives aera moments of inertia I_x and I_y and Elastic modulus E
EdgStff	I_x * E
GJstff	G * K	Hawc2 gives the torsional stiffness constant K and the shear modulus of elasticity G
EA	E * A	Hawc2 gives the Elastic modulus E and the cross sectional area A
FlpIner	m * ri_x^2	Hawc2 gives the radius of gyration ri_x
EdgIner	m * ri_y^2
ElasticCenterOffsetX	x_e	Ashes and Hawc2 use the same definition and reference point
ElasticCenterOffsetY	y_e
MassCenterOffsetX	x_cg
MassCenterOffsetY	y_cg
ShearCenterOffsetX	x_sh
ShearCenterOffsetY	y_sh
GShearAreaFlapwise	G * A * k_x	Hawc2 gives a shear correction factor k_x
GShearAreaEdgewise	G * A * k_y

Note on the mass: to get the correct mass of the blades in Ashes, given that Hawc2 provides the mass at the center of an element, the average of the masses at the two nodes defined in the Hawc2 file should be taken. This was done for the IEA 15-MW blade, because it has relatively few structural elements, and not doing so resulted in a blade mass 12% larger than the specification document.