which file do you need to edit to get these values to work?
Ai cfg,
and you will need to do it for each separate variant.
2 Likes
for anyone else needing help to hotfix the autopilot, modify the ai.cfg file in directory:
[plane_folder]\SimObjects\Airplanes[plane_model]\
example:
\aerosoft-aircraft-twin-otter\SimObjects\Airplanes\AS_Aircraft_DHC6-300_Wheels_Skydiver\ai.cfg
and change these two line:
pitchPID= 2, 0.1, 10, 1, 100
rollPID= 1, 0.1, 1, 8, 100
Hope this helps!
6 Likes
I’m looking forward to buying the Twin Otter, but will wait for the autopilot to be fixed in the first update, (which Aerosoft has now announced as been done).
Still loving it…
Great … after all the default “ everybody is to blame except aerosoft “ they finally found it out themselves 
2 Likes
So what’s the correct procedure for the props at startup? The checklist says they should be full forward before starting the engines but when I watch streamers on Youtube they always leave them in feathered mode and then push them forward after they’ve introduced fuel. Isn’t it weird if Aerosofts official checklist is incorrect?
Yes, this kind of reminds me of the situation with the SWS Kodiak actually.
The initial release had real issues with P-Factor. Almost everyone complained, except a few forum users for some reason, and both they, and the developers claimed the flight model was extremely accurate, and that real Kodiak pilots has signed off on it, so there was nothing to fix.
Within a day or so CandianCaptainMoustache releases a mod on their Discord that reduces P-factor as well as tweaking a few other things.
Two days after that SWS announce a new patch, and strike me down if they haven’t reduced P-factor.
These kinds of timelines have started to make me suspect that some devs. have a more tenuous grasp of the SDK than we might be lead to believe, and also perhaps even question how real pilots, of the type no less, could have signed off on it in the first place.
I know the explanation was that it was an incorrect build that got pushed out, or similar, and the one we should have got wasn’t that, but that shifts the problem from one of a poor understanding of the SDK, to poor quality control, and perhaps attention to the detail.
Neither situation is good.
I for one will do as I always do, keep backups of old plane releases so I can run a diff. on the config files to identify what they change. I look forward to what Aerosoft discover…
5 Likes
Really hope this gets fixed soon!
And it’s only one switch that does it. I forget it’s exact name but I think it’s an inlet one.
The manual mentions a anchor option for the float model. How to you egngage this option and what in the cockpit deploys the anchor?
thanks
john
Probably yet another hold over from the P3D version that no longer applies.
the manual also says it has IAS hold, but it doesn’t work. Very annoying.
3 Likes
As far as I understand it there was nothing wrong with the P-factor. There was/is another instability in the flight model. They reduced the P-factor (far below what it should be) as a temporary fix, until they can do a more fundamental fix.
In my opinion, this is a general problem in MSFS 2020 that it seems to be impossible to give planes a realistic P-factor. Maybe when Asobo will rework the propellor physics as a stepping stone towards helicopters this will get better.
I haven’t tried refuelling but ground power definitely works.
TL;DR: Full forward at start is fine, except when it’s cold out. Then they should be started in feather.
The Twin Otter manual takes precedence. However, I did come across an interesting article which claims that an unknown aircraft’s manual states this:
The Propeller lever may be placed in the full forward position during the start sequence for more convenient movement of the Start lever providing the temperatures are warm. For cold weather starts the Prop lever should be aft, as called out in the starting instructions (refers to engine maintenance manual), as initial oil pressure will go to engine bearings instead of the propeller dome.
This particular instruction leaves it to the pilot’s judgment as to what defines “warm” or “cold” weather. The Pratt & Whitney Canada PT6A-34AG Maintenance Manual starting instructions place the prop condition lever in FEATHER position at start-up.
The logic behind this is that oil flow, minimal at start-up, is best utilized for engine bearing lubrication.
And for shutdown, the Twin Otter manual still takes precedence. But if you’re curious:
The Maintenance Manual instructions for shutdown instruct the operator, in check-list fashion, to:
- Place the power control lever in the Ground-Idle position with a note to allow the engine to stabilize for a minimum of one minute at the minimum obtainable ITT (Inter Turbine Temperature or T-5).
- Place the propeller control lever in Feather position.
- Start Control or fuel condition lever in Cut-Off. Then- the fuel boost pump switch, fuel system shutoff switch and, master switch are placed in off positions.
I don’t fly turbines in real life so I can’t vouch for the accuracy of this on a first hand basis, but as a pilot, it seems legit.
3 Likes
I again expressed myself incorrectly. I meant that the location of the tanker car and the location of the external power supply are not correct. Cars become inside the aircraft, and not next to it.
Yes for PT-6 it doesn’t matter that much. The props are already feathered at start-up so starting up with prop levers feathered means no change in blade angle. When its cold outside and the oil is thick its better to wait until the oil warms up before unfeatheting the props.
2 Likes
And this is why I wont buy this addon (Service vehicles). There is no point in buying it when they park themselves inside the plane.
I would hope or would like to hope that there is or could be some kind of boundary system where these ground objects could know exactly where to park, and in what direction so they are not clipping inside the plane. The worst is when it is in the cockpit lol I have had this a few times with some planes.
1 Like