phugoid curve
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Dromaeosauridae — Deuterostomia Dromaeosaurids Temporal range: Middle Jurassic – Late Cretaceous, 164–65.5 Ma … Wikipedia
Microraptor — Vertebrata Microraptor Temporal range: Early Cretaceous, 120 Ma … Wikipedia
Dihedral (aircraft) — For other uses, see Dihedral. The upward tilt of the wings and tailplane of an aircraft, as seen on this Boeing 737, is called dihedral angle Dihedral angle is the upward angle from horizontal of the wings or tailplane of a fixed wing aircraft.… … Wikipedia