Wanted to make a slow ILS approach to Cottesmore. Captured the ILS OK but when I moved the nozzles the autopilot disconnected.
Playing around it seems that the autopilot will only keep itself connected when the nozzles are fully aft. Is that correct?
Also found that when autostarting (Ctrl+E) that when the engine is up and running the brakes release themselves. Not nice when parked and wanting to go through any preflight checks.
Cheers Ron
Hi Ron,
- About Autopilot:
Yes, correct. That is: it is programmed that way.
- ParkingBrakes switching OFF:
They shouldn't be released during Autostart.
- Are you sure you have set your throttle to Idle ?
- And if so, is your Throttle lever calibrated correctly ? (meaning that if the lever is at idle, it actually gives a zero value). Try increasing the Null zone a bit for the Throttle axis, in menu Options- Controls, and see if that help.
Also (depending on the type of joystick/yoke/throttle quadrant, and drivers for it, you use): sometimes, immediately after load and without moving a controller lever, FSX startsup with a lever value of 50% even if the lever is at Idle position.
Only remedy is to move the lever a bit, so FSX "sees" the actual value.
E.g: I have this problem myself with a home-built (gameport) throttle quadrant, connected via a USB convertor.
If you're interrested, some background info.
Both things have to do with the lack of support in MSFS for non-longitudinal thrust.
Hence, in this Harrier two flightmodels are used, which obviously have some limitations in transitioning from one FDE to the other:
- The "normal" FS FDE, active when nozzles are at 0 and ParkingBrakes are SET.
- My gauge-coded "V(S)TOL" FDE, active when nozzles are out of 0 position, or ParkingBrakes are OFF.
Implementing an AP function in my gauge-coded FDE, is a step too far at the moment.
Beside, I'm sure (but somebody will correct me if I'm wrong

) a real Harrier cannot fly on AP when the pilot is manipulating the nozzles.
This also explains why the ParkingBrakes are automatically set OFF when thrust is above a certain level; if not, the Harrier (in FSX) would shoot through it's brakes, even in VTOL configuration, because the "normal" FS flightmodel is still active.
Hope this helps ...
Rob