My Century III in my old Arrow did a better job of flying RNAV approaches! Like they say, somethin' ain't right. I had to disconnect autopilot, turn airplane by manually, then reengage GNSS after turn to follow approach. The entry to the IAF, and the 90 degree turn to line with the FAF were both at half rate. The approach was an RNAV with "T" waypoints. Fuller disclosure, the hold and approach were at totally different points. Totally understand what it needs to intercept. When I disconnect the autopilot and hand fly the turns, the bank angle doubles.
Where is the "high setting" that you are referring to? Lastly, the turn coordinator is lining up with the Aspen and confirming that all of the turns were made at half rate. The autopilot / Aspen is in GNSS mode, navigation mode is RNAV. Last but not least you can stay on the magenta line if you set your GPS to one mile instead of the standard 3 mile enroute so it wont get to far off course before adjusting. Don’t confuse your attitude Indicator at 15 degrees in this example with the assumption it is the standard rate shown on the Turn Coordinator.ĩ0 kts, add 9+5=14 degrees of bank gives you a standard rate turn.Ĭompare that to the Turn Coordinator. Stec will only go to 90% or 15 degrees in this example. That is your bank angle to get a std rate turn.ġ20 kts, add 12+5=17 degrees of bank gives you a standard rate turn. Take the first two digits of your airspeed (or just the first digit if you are under 100kts) and add 5 to it. Check the accuracy of your Turn Coordinator by: Basically it will not intercept unless you have it within 10% of the course before you select the mode except when I GPSS mode. Finally standard rate depends on your airspeed. I think Heading on the St50 and GPSS on the Aspen might also work. Remember it will use a more shallow bank angle depending on what it needs to intercept.
As an example use the left/right roll command to determine if it is giving the same rate indication as approaching a course for GPS/VOR/LOC. However before you do so try to see how it works in different scenarios. There is no pilot adjustment so it will need to go to the dealer if you are not satisfied with the turn rate. This autopilot is limited to 90% of standard rate. Anyone else have this issue, and what solved it? Gain setting on the Aspen? Defecting turn coordinator? Setting on the STEC? I have found discussions about this in some other forums, but I have yet to find the magic setting that determines the rate of turn.
STEC 50 AUTOPILOT MANUAL FULL
All turns associated with holding patterns, and RNAV approaches are only made at half of the standard rate, NOT full rate.
STEC 50 AUTOPILOT MANUAL PRO
STUMPED! In my F, I have the Aspen PRO 1000 glass, STEC 50 autopilot, and the GTN 650.