ESC keeps beeping on ArduPlane

When I power on the Pi and the Navio in my plane the ESC keeps beeping. The only way to stop the beeping is to set mode to manual, arm the apm and then move the throttle stick full op and back down. The ESC is then happy and recalibrated. Is there a parameter I can set so the PWM signal on channel 3 tells the ESC not to freak out while ArduPlane is booting?

I calibrated the radio, btw. Throttle failsafe is off.

Using a different ESC now. Works…