NASA’s Big Tiltrotor Test Rig Is Ready After a long gestation, trials of a unique test rig for large tiltrotors will begin in March in the National Full-Scale Aerodynamics Complex (NFAC) at NASA Ames Research Center in California. The Tiltrotor Test Rig (TTR) replaces the Prop Test Rig (PTR) used in development of the Bell XV-15 and Bell Boeing V-22, but damaged beyond repair in 1991. Designed to enable full-scale proprotors to be tested in the large wind tunnels at NFAC, PTR had a ...

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