"""Computation of tail areas w.r.t. HQ criteria."""
# This file is part of FAST-OAD_CS23 : A framework for rapid Overall Aircraft Design
# Copyright (C) 2025 ONERA & ISAE-SUPAERO
# FAST is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
import openmdao.api as om
import fastoad.api as oad
from fastoad.module_management.constants import ModelDomain
from .constants import SERVICE_HT_AREA, SERVICE_VT_AREA
[docs]@oad.RegisterOpenMDAOSystem(
"fastga.handling_qualities.tail_sizing", domain=ModelDomain.HANDLING_QUALITIES
)
class UpdateTailAreas(om.Group):
"""
Computes areas of vertical and horizontal tail.
- Horizontal tail area is computed so it can balance pitching moment of
aircraft at rotation speed.
- Vertical tail area is computed so aircraft can have the Cnbeta in cruise
conditions and (for bi-motor) maintain trajectory with failed engine @ 5000ft.
"""
# pylint: disable=missing-function-docstring
# Overriding OpenMDAO initialize
[docs] def initialize(self):
self.options.declare("propulsion_id", default=None, types=str, allow_none=True)
# pylint: disable=missing-function-docstring
# Overriding OpenMDAO setup
[docs] def setup(self):
propulsion_option = {"propulsion_id": self.options["propulsion_id"]}
self.add_subsystem(
"horizontal_tail",
oad.RegisterSubmodel.get_submodel(SERVICE_HT_AREA, options=propulsion_option),
promotes=["*"],
)
self.add_subsystem(
"vertical_tail",
oad.RegisterSubmodel.get_submodel(SERVICE_VT_AREA, options=propulsion_option),
promotes=["*"],
)