This is a rotorcraft airfoil. Item 206 is the rear wing spar. All the information you need is provided in the actual patent application.
US Patent Application for COMPLIANT STRUCTURE DESIGN FOR VARYING SURFACE CONTOURS Patent Application (Application #20170274976)
Description of the Design Challenges
Designing an adaptive control surface for a rotorcraft poses significant challenges.
Patent History
Publication number: 20170274976
Type: Application
Filed: Jun 13, 2017
Publication Date: Sep 28, 2017
Applicant: FLEXSYS, INC. (Ann Arbor, MI)
Inventors: Joel A. Hetrick (Ann Arbor, MI), Sridhar Kota (Ann Arbor, MI), Gregory F. Ervin (Canton, MI)
Application Number: 15/621,117
FIGS. 18(a), 18(b), and 18(c) are simplified schematic representations of a layered structure arrangement 200 that is provided with web-like structures 202 that are, in this specific illustrative embodiment of the invention, bonded to compliant skin 210, which will be described in greater detail in connection with FIGS. 18(b) and 18(c), below. Referring to FIG. 18(a), layered structure arrangement 200 is shown to be provided with a drive bar 204 that applies a linear force against rear wing spar 206 by operation of an actuator 208. The motion of drive bar 204 is transmitted to a compliant skin 210, the motion of the compliant skin being accommodated by a sliding joint 214 that in some embodiments of the invention may be configured as an elastomer panel (not shown).