Sea Level Density overhaul -> Requires OpenMDAO bugfix

[Kenneth-T-Moore]

Summary

Remove the RHO_SEA_LEVEL_ENGLISH and RHO_SEA_LEVEL_SI constants that were used in various places and had different values.

• In places where this was used in the denominator of a density ratio, it was replaced with an option Mission.SEA_LEVEL_DENSITY. This option will be set automatically by the preprocessor if it isn't specified in the csv file. Like gravity, the preprocessor will compute it from the atmosphere model that is chosen.
• In places where Density is meant to be the current state, it is now pulled from an existing atmosphere component instead.

In 2DOF, thee VRot execcomp, which computes the speed at which rotation starts, has been moved into the groundroll phase along with its constraint.

• The execcomp has been replaced with an ExplicitComponent in preparation for the gravity overhaul part 4.
• The density input now uses the local atmosphere instead of a hard-coded value.
• The mass input now uses the mass at rotation instead of at taxi end.

This work has exposed a bug in OpenMDAO when connecting an input to another input. This requires a bugfix that is currently a PR, but will soon be merged, and will eventually become part of a release. The CI has been configured to load OpenMDAO from github in all workflows for now.

Related Issues

• Resolves Remove RHO_SEA_LEVEL constant #1191

Backwards incompatibilities

None

AI Usage

None