For a discussion of the Kepler problem specific to radial orbits, see Radial trajectory. A vortex flow might also be combined with a radial or axial flow pattern. It combines flow and force components of both radial and axial types. The design combines features of radial and axial turbines. Producing surfaces using both radial and axial feeds is called profiling. Mixed-flow pumps function as a compromise between radial and axial-flow pumps. These structures are composed of longitudinal fibers surrounded by radial and helical fibers. Other tubes have concentric and radial jointing features. Vascular branches supply the radial and ulnar arteries. The second was due to a distal radial fracture. This made the inertia starter a common choice for aircraft with large radial piston engines. The normal force is actually the sum of the radial and tangential forces. The water flow is controlled by contractions of the radial and circular mantle cavity muscles. Ceramics lend themselves to circular motifs, whether radial or tangential. Acute tears have many different shapes (vertical, horizontal, radial, oblique, complex) and sizes.