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The Maryland Tiltrotor Rig (MTR): Baseline Gimballed Hub

Frederick Tsai, James Sutherland-Foggio, Anubhav Datta, University of Maryland
Dave Privett, Calspan

May 13, 2019

https://doi.org/10.4050/F-0075-2019-14737

Abstract:
This paper describes the features, specifications, and instrumentation of a new tiltrotor test rig at the University of Maryland, the Maryland Tiltrotor Rig (MTR). The MTR is a semi-span, floor-mounted, optionally-powered rig with a static rotor tilt mechanism, capable of testing proprotors of up to 4.75-ft diameter in the Glenn L. Martin wind tunnel (7.75- by 11-ft section with 200 kt maximum speed). It supports interchangeable hubs (gimballed and hingeless), interchangeable blades (straight and swept tip), and interchangeable spars, to allow a systematic variation of components important for tiltrotor flutter and loads. The baseline rig dimensions are 1/5.26 scale XV-15 or 1/8 scale V-22. The principal objectives are to measure tiltrotor instabilities in cruise and vibratory loads in conversion. Additional objectives are airloads, drive system loads, rotor-wing aerodynamic interactions, and closed-loop control of loads and instabilities. The baseline rig is a gimballed hub. It is complete, all components fabricated (Calspan), parts assembled, sensors integrated, and statically calibrated. The objective of this paper is to describe this baseline rig. The vision behind the rig is to conduct research on future high-speed tiltrotors with an envisioned flutter-free cruise up to 400 kt, enabled by thin wings, and light-weight, low-vibration, high-performance rotors.


The Maryland Tiltrotor Rig (MTR): Baseline Gimballed Hub

  • Presented at Forum 75
  • 15 pages
  • SKU # : F-0075-2019-14737
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The Maryland Tiltrotor Rig (MTR): Baseline Gimballed Hub

Authors / Details:
Frederick Tsai, James Sutherland-Foggio, Anubhav Datta, University of Maryland
Dave Privett, Calspan