JD-EE
I believe somebody some time ago pointed out the part's part number was 36g? Or did I miss that getting refuted.
Arm 36g was so named due to a requirement in the regulations, and its part name is directly related to the moment it was designed to handle.
HazelNuts39 found the appropriate reference, and though I haven't done a search, the original discussion on the subject is spread through pages 20 ~ 30 in this thread. I believe that
OE's analysis of Arm 36g is probably correct, and tail strike protection of the rudder is probably the prime reason for its existence.
mm43