Duality Sizing contains the Duality engine cycle model, aircraft weight/volume closure, and constraint-analysis tools used for thrust-loading versus wing-loading studies.

The upstream pyCycle source is not vendored in this repo. Install om-pycycle as a dependency, then run the Duality scripts from this checkout.

Install the package and dependencies in the active Python environment:

pip install -e .

The current development environment has been run with:

& 'C:\Users\AlexanderAmos\miniconda3\envs\cycle_env\python.exe' -m sizing.constraint_diagram

Because this repo previously installed om-pycycle in editable mode from the same checkout, that environment may need a clean om-pycycle install after this cleanup:

pip uninstall om-pycycle
pip install om-pycycle
pip install -e .

Generate the Duality cycle station map:

python example_cycles/duality.py

This writes:

duality_cycle_map.png
duality_station_geometry.txt

Generate the integrated constraint diagram:

python -m sizing.constraint_diagram

This writes:

_constraint_diagram.png

The default cases are defined in sizing/constraint_diagram.py by default_constraint_design_points().

The integrated diagram currently evaluates:

• constant-altitude/speed cruise
• constant-speed climb
• constant-altitude/speed turn
• climb acceleration
• ideal takeoff ground roll
• takeoff ground roll with drag and friction
• braking roll
• service ceiling
• takeoff climb angle

Shared thrust-loading math lives in sizing/constraint_equations.py.

• example_cycles/duality.py: Duality pyCycle model and cycle station map
• sizing/: aircraft geometry, weight, volume, mission closure, and constraints
• coupled_mission/: mission and deck utilities for coupled studies
• scripts/: command-line helpers for mission and deck generation

The pycycle package is provided by the external om-pycycle dependency. This repo now keeps only the Duality-specific application code and generated outputs.