MYTraveler
Guru
I can't figure out how to "zero" the rudder angle indicators on two IS20s (Rudder version), which are part of a system that includes two AP28s and 6 jog lever controls. The system has been installed and working fine for the past 10 years, although I have a vague recollection of the rudder angle indicators having previously lost their center.
The problem now is that with my rudders centered, both AP28s indicate centered rudders, but one of the IS20s shows the rudders 1/8 to starboard and the other shows hard over ("1" on the instrument's scale) to starboard. If I turn, every indicator adjusts to show the turn (so a small turn to port shows 7 on the AP28s (different scale), centered on one IS20 and 7/8 on the other. Everything would be fine if I could just get the two IS20s to center when the rudders are centered. I have read the documentation but from what I can tell the IS20s are supposed to be self-calibrating. I have tried rebooting the entire system, but the IS20s went back to their prior positions.
I am hoping someone else with a Simrad AP system has figured this out. I sent an email to Simrad but got a response back indicating that it will take weeks to get a response.
Thanks for any advice. -Rick
The problem now is that with my rudders centered, both AP28s indicate centered rudders, but one of the IS20s shows the rudders 1/8 to starboard and the other shows hard over ("1" on the instrument's scale) to starboard. If I turn, every indicator adjusts to show the turn (so a small turn to port shows 7 on the AP28s (different scale), centered on one IS20 and 7/8 on the other. Everything would be fine if I could just get the two IS20s to center when the rudders are centered. I have read the documentation but from what I can tell the IS20s are supposed to be self-calibrating. I have tried rebooting the entire system, but the IS20s went back to their prior positions.
I am hoping someone else with a Simrad AP system has figured this out. I sent an email to Simrad but got a response back indicating that it will take weeks to get a response.
Thanks for any advice. -Rick