I'm building an RCexplorer style Tri with a AMP2.5, Turnigy9x (in airplane mode) and all the other HK.com stuff I need. I'm running Arducopter V2.9.1b and everything seems to work great (Pitch,Roll, throttle), except the yaw servo. In failsafe there is no output to channel 7 no matter the Yaw input from the Tx or movement of the AMP.
I'm hoping there's some setup step I missed somewhere but I've been through most of the relevant wiki pages an nothing seems to pop out at me.
Hope some one can help me out!
TLDR: AMP2.5, V2.9.1b tri, Turnigy 9x, no output to channel 7 / yaw servo