Additional empennage components.
<a href="https://en.wikipedia.org/wiki/Federal_Aviation_Administration" class="extiw" title="w:Federal Aviation Administration">FAA</a>
Extracted from the <a rel="nofollow" class="external text" href="https://www.faa.gov/regulations_policies/handbooks_manuals/aircraft/glider_handbook/">Glider Flying Handbook</a> (figure 2.12 of <a rel="nofollow" class="external text" href="https://www.faa.gov/regulations_policies/handbooks_manuals/aircraft/glider_handbook/media/faa-h-8083-13a.pdf">FAA-H-8083-13A.pdf</a> file)