by Octal450 » Wed Jun 24, 2020 3:36 pm
Hello friend,
You need to align the IRS. I think the timer is broken, so I recommend setting IRS Aligns Instantly for now. I'll be rewriting the entire IRS soon.
In the MD-11 the vertical and thrust modes are coupled. In a PITCH throttle mode, the autothrust will set the thrust to the current limit (T/O, CLB, etc), or the idle limit depending on your position relative to the altitude selector. The autopilot will then controls the IAS or Mach target on the PFD by adjusting aircraft pitch attitude. The system is damped heavily and will smoothly acquire speeds instead of racing towards them. in THRUST throttle mode, autothrust controls the IAS or Mach target on the PFD by adjusting throttle. The autopilot is then following a set vertical path, such as ALT HOLD, Vertical Speed, Flight Path Angle or Glideslope.
After making a change on the Speed, Heading, or Altitude Knobs, you must pull the knobs to activate the command (Middle click, or shift left click). This will activate the command. Pushing the knobs (left click) will hold the current speed/heading/altitude with slight prediction for smooth level-out.
To follow the Route, you need to push NAV button. It will be armed on ground and become active in air at 150ft AGL. Keep in mind the AFS will not engage in NAV mode until 400ft AGL.
Before starting takeoff roll, push AUTOFLIGHT. You will see the ATS OFF box on the PFD disappears. The Autothrust is now armed. When you advance your throttles, the system will automatically activate the T/O THRUST mode and set takeoff thrust. At 80kts, the system reverts to T/O CLAMP, and power can be adjusted by the pilot if desired. At the thrust reduction altitude, the thrust is automatically reduced to CLB THRUST by the autothrottle. You can engage autopilot starting at 150ft, but this raises to 400ft if NAV is on. Attempting to turn on earlier, results in the flashing red A/P OFF box and the "bitching-betty" sound. Press the autopilot disconnect button on the yoke (or SHIFT+D) to cancel it. The Autothrottle disconnect is on the throttles, or CTRL+D. NEVER EVER press the AFS OVRD switches down. Doing this will kill the flight computer protections and some of the FCC functions! its for emergency use only.
Does that answer your questions?
Thank you for flying her!
Kind Regards,
Josh
PS: feel free to join the discord in my signature if that sort of thing interests you.