tail_volume_coefficient_sizing.py

class openconcept.stability.tail_volume_coefficient_sizing.HStabVolumeCoefficientSizing(**kwargs)

Bases: ExplicitComponent

Computes horizontal stabilizer reference area using tail volume coefficient method from Raymer (see Equation 6.27 in Section 6.4 of 1992 edition).

Inputs:

  • ac|geom|wing|S_ref (float) – Wing planform area (scalar, sq ft)

  • ac|geom|wing|MAC (float) – Wing mean aerodynamic chord (scalar, ft)

  • ac|geom|hstab|c4_to_wing_c4 (float) – Distance from the horizontal stabilizer’s quarter chord (of the MAC) to the wing’s quarter chord (scalar, ft)

Outputs:

ac|geom|hstab|S_ref (float) – Horizontal stabilizer reference area (scalar, sq ft)

Options:

C_ht (float) – Tail volume coefficient for horizontal stabilizer, by default 1.00 from Table 6.4 in Raymer 1992 for jet transport aircraft. See the table for other values (twin turboprop is 0.9).

class openconcept.stability.tail_volume_coefficient_sizing.VStabVolumeCoefficientSizing(**kwargs)

Bases: ExplicitComponent

Computes vertical stabilizer reference area using tail volume coefficient method from Raymer (see Equation 6.26 in Section 6.4 of 1992 edition).

Inputs:

  • ac|geom|wing|S_ref (float) – Wing planform area (scalar, sq ft)

  • ac|geom|wing|AR (float) – Wing aspect ratio (scalar, dimensionless)

  • ac|geom|vstab|c4_to_wing_c4 (float) – Distance from the vertical stabilizer’s quarter chord (of the MAC) to the wing’s quarter chord (scalar, ft)

Outputs:

ac|geom|vstab|S_ref (float) – Vertical stabilizer reference area (scalar, sq ft)

Options:

C_vt (float) – Tail volume coefficient for vertical stabilizer, by default 0.09 from Table 6.4 in Raymer 1992 for jet transport aircraft. See the table for other values (twin turboprop is 0.08).