Vertical Navigation (VNAV)

[997R8V10]

Build a VNAV system with the new Autopilot System. This should be able to comply with altitude and speed restrictions and generate FMS Descent paths. A new VNAV Autopilot Vertical mode should be implemented with sub modes.

FMS

• [x] Add PERF INIT to FMS with Climb/Cruise/Descent speeds
• [ ] Fetch grib point for every waypoint on flight plan at predicted alt. May be worth fetching points at various altitudes
• [x] Add speed/alt limit field
• [x] Add Transition Alt and Level fields

VNAV Path Planning

• [ ] Recalculate path when any input data is changed
• [ ] Once the descent is started, angles should not be adjusted unless the plane is on a level segment
• [ ] Plan descent at a default 3.0 FPA (Specified on perf init)
• [ ] Working from bottom to top, build slow down fixes for speed restrictions
• [ ] Above 10000AGL, adjust angle per segment to target an idle descent

[997R8V10]

Rudimentary VNAV implemented. More advanced vnav required.