by Soitanen » Fri Apr 25, 2014 2:26 pm
Hello!
After long time I'm ready to introduce fully reworked autopilot. Now it works like real one (based on FCOM, real pilot's advices, AMM).
It have now two independent FCC (flight control computers), which really uses different inputs (from captains or FOs instruments).
I have prepared proper indication for EADI's FMA, but as I don't have Canvas based EADI it can be viewed only from property tree (see /autopilot/display/).
Also there are proper computation which FCC is master at the moment, and EADI FD shows master value. But if it's APP mode it can show different (as in reality). But current 3D model of MCP doesn't allow me to illuminate green light to show master FCC.
Helper feature added: when AT is engaged and throttles are moving, you can view AT position and your joystick throttle position - this can help to set proper throttle before disconnecting AT. You can turn off this feature in property tree (/b733/at-helper).
How to take-off now: Set V2 on MCP. Turn on both FDs. First turned FD must be on pilot flying side. Arm AT. Advance throttles forward to have about 40% N1, then press 'd' key - it's TO/GA button. FD must show command pitch -10 degrees. At 60 kts it will show +15 degrees, after take-off it will help to maintain V2 (MCP SPEED) + 20 kts.
How to autoland: tune BOTH NAV radios to localizer. Set course for localizer in left and right MCP windows. Point aircraft to intercept localizer in HDG SEL or LNAV mode. Press APP button - VOR/LOC and G/S modes will be armed. Engage second autopilot. After localizer and glideslope capture, if radar altitude will be not less than 800 ft FLARE mode will be armed and second autopilot couples with flight control. Arm spoilers ('k' key, Spolers armed message must appear on screen). At 50 ft FLARE maneuver will start, at 27 ft AT start to RETARD. Don't forget to move your real joysticks throttle to idle too or spoilers can be not deployed.
If you will find bugs in autopilot logic, please, post it here, I will solve them.
Known bugs:
- VNAV is not working at all, just empty button.
You can update 737-300 git repo from github or download it directly from github page (see my signature for link, right part of page, "Download ZIP" button)