From the Boeing FCTM

Quote

On a dry surface, use approximately 10 knots for turn angles
greater than those typically required for high speed runway turnoffs.

I'm guessing that most sim pilots taxi too fast. I have had no problems with the latest PMDG update and AAU1, but one does need to keep those speeds in an appropriate range. I have a separate tiller axis and only need it for those tighter turns described in the FCTM. 

The issue that I have with the latest PMDG update is that at low speed, keeping the plane strait is impossible. Steering was fine before the update.

Edited February 3, 20233 yr by CarlosF

2 hours ago, Stearmandriver said:

I did a sim flight in the -700 today; taxiing was normal for me, sorry.  You do have to slow way down for anything near a max deflection turn, but it's been like that for a lot longer than this last update.  I agree that could still use some work, but it's not too bad... But yeah, I see no change since the MSFS update.

Sorry Andrew, I know you fly the things but you are clearly not seeing the same thing I am seeing and I'm not even talking about anything near maximum defelction turns. What I'm seeing is laughable and not even close to how it behaved before the MSFS update. Perhaps try the 800 variant and see if that's different, if you have it.

I have been flying this thing almost every day in the sim for a month and a half and it never behaved even close to what I'm seeing now. I used to have no trouble turning it at all. The update may well have messed something up with my installation but this is utterly utterly broken on my end. It's behaving as one might expect if you took off the tyres and replaced them with alpine skis. It just doesn't want to turn. If I enter a turn even below 5 it just hardly turns at all despite the nose gear turning fine. The thing just ploughs on. Before, even if you got into this condition because you were doing something like 20 in the turn you could just slow down and the thing would grip again and therefore start turning. Not anymore. I can enter the turn at 5, it just ploughs on, I slow down and nothing. I have to stop completely and start rolling again to get it to grip at all and even then I often have to assist it to turn with asymetric thrust.. It's broken. One way or another it's broken for me. Turns I would comfortably take at 15 now require 4. As I said, not even close and certainly nothing as reality.

I'm willing to bet you don't have to slow down to 3 and only turn the nose wheel a few degrees to get it to turn when you're in work? If you were seeing what I'm seeing your turning circle would be larger than a container ship for any turn beyond 20 degrees from heading 😆 Imagine how much larger airports would need to be.

I have no idea what's happend here.

1 hour ago, toucanair said:

What were the weather prevailing conditions, was it wet, icy, frost conditions, at any rate It's inadvisable to be making tight turns above 10kts as the nose wheel will potentially skid sideways, I only know this as I've had it happen in the real world on an A320 and B747 

Summer time in South America, mate. Weather wasn't the problem. And it's not tight turns. I don't make tight turns above 10 knots. Although it was just about possible before the update. It just doesn't turn. No matter how little or how much I want to turn or how slow you go it's always ploughing on as though the front wheels are not even on there and have been replaced with skis.

40 minutes ago, mwilk said:

You're really better off to post on PMDG's official support forum. The developers are there and can either explain why it's operating that way or it will let them know that there's an issue.

I would but they have a policy of full names and despite there always being a kind of unwritten agreement that you could use just your first and it would be fine (as I have for many a year and others still do) recently, a nosy tell-tale busy-body stuck his nose in forcing a mod to act and give me a naughtly mark or whatever they call it. I didn't care to be treated like a child at school as I'm a paying customer and I refuse to put my full name on the web due to an incident that occured once involving the kind of nutter one only encounters in cyberspace. Neither am I comfortable with dishonestly making up a name keep the busy-bodies quiet. I have no problem with PMDG knowing my full name but no one else there needs to have it. My first is plenty to promote a friendly and personable environment whilst protecting me and mine from such an experience again.

Because of this I can no longer post there without getting another absurd letter from the headmaster followed by whatever ridiculous punishment point or whatever it was. Which as a paying customer sits with me rather badly with me if I'm to be frank about it.

I will submit a ticket if a reinstall doesn't clear the problem.

58 minutes ago, Haddock69 said:

I don't have the 737 yet, but it sounds to me like the A320 does react if you tried to turn it with rudders only when it has the tiller active in the options ...

So : is there a tiller mode on the PMDG 737 and if yes, maybe it is active now after the update ?

I have explained that checking my tiller configuration settings was the very first thing I did. Still set to tiller and pedals in the CDU and all are correctly calibrated which is evidenced by the fact that the tiller is turning the nose wheel to full deflection and the pedals are not. The wheel is turning. The aircraft, isn't.

56 minutes ago, B777ER said:

PMDG had a massive issue with this exact problem in P3D. They had to change it to allow the user the old way of turning as an option. Of course RSR said their turning behavior was beyond reproach but that they would put an option into it to make it much easier to turn. 

Honestly, I have had them all. Nothing has behaved anything like this. The damed thing simply won't turn. It's not a subjective thing I'm talking about. If you were experiencing what I am you would laugh about loud. It reminds me of the time I saw Giancarlo Fisichella fly out of the tunnel at Monte Carlo with no front wheels as he frantically turned the steering wheel trying to get it to turn as Martin Brundle in the commentary box said...."no point turning that my friend there is nothing attached to it"

 

1 hour ago, crimplene said:

I am not sure what a "turn of substance" might be. Normal taxiline turns on airports are good. I tried some 90 degree turns with 18 to 20 knots (which is considered way to fast, afaik), all was fine, the 737-800 took the turn easily.

Easily my experience before the MSFS update. Now, nothing even close to it. In order to make a normal 90 degree turn at a normal taxi way intersection I am needing to drop somehwere below 3 whilst differential braking and using one engine thrust. Hilairiously unrealistic. Laughably so and undoutably broken somehow and somewhere. I just need to find out why and where. It's behaving like some git stole my front wheels in the middle of the night.

 

 

40 minutes ago, crimplene said:

Post update, latest 737 version, yes. I used the rudder axis of my joystick. Did you look at the nosewheel how much it deflects when the plane moves? Does it turn with you steering input? Maybe something with control settings is off. As far as I could see the turning speed of the plane and wheel infection relate very well in normal turns.

Yes it does full deflect accordingly, it's just that the aircraft doesn't care. Well I'll submit a ticket I guess.

I have the same problem too. Sometimes the 737 just refuses to turn at all even at speeds below 10 knots and you just end up in the grass with the steering turned on full lock. I find its most problematic when turning into a gate or doing a 180 on the runway. Never had this problem ever with any sim or plane.

42 minutes ago, jrw4 said:

From the Boeing FCTM

I'm guessing that most sim pilots taxi too fast. I have had no problems with the latest PMDG update and AAU1, but one does need to keep those speeds in an appropriate range. I have a separate tiller axis and only need it for those tighter turns described in the FCTM. 

Not this one. Been doing this a hell of a long time and flown every PMDG 737 in every sim since it was released. I know fully well what the appropriate speeds are and what I can expect of it. Mine is now laughably broken since the last sim update. Unless those appropriate ranges have now all dropped below 3 overnight and after a sim update and also require differential braking and asymetric thrust to acheive I would say something is rather broken for me and it looks like at least one other person in this thread.

This is not a case of newbie doesn't know. Take my word for it. The aircraft no longer turns for me. The only purpose of this thread was to establish if this is unque to me or a universal problem so I could discern my next course of action. If others are having no problem then perhaps a reinstall will fix my issue. It looks like some don't have the problem or have not discovered they have it yet and one has indeed noticed it. So I'm not completely alone. I suspect more people may start popping up with it soon enough.

It's so completely obvious though that I struggle to believe that anyone experiencing it wouldn't immediately notice it as it's so bad it's funny.

4 minutes ago, james42 said:

I have the same problem too. Sometimes the 737 just refuses to turn at all even at speeds below 10 knots and you just end up in the grass with the steering turned on full lock. I find its most problematic when turning into a gate or doing a 180 on the runway. Never had this problem ever with any sim or plane.

Were you always having this trouble with it? Or just since the latest MSFS update 2 days ago? How long have you had the aircraft?

4 hours ago, Fiorentoni said:

EDIT: And yes, this was def not the case before AAU1.

Are you 100% sure? I was in the beta of AAU1 and as soon as the last update for the 737 dropped from PMDG, which included a new ground handling, I noticed this behaviour.

Edited February 3, 20233 yr by Farlis

Just now, Farlis said:

Are you 100% sure? I was in the beta of AAU1 and as soon as the last update for the 737 dropped from PMDG, which included a new ground handling, I noticed this behaviour.

Well I wasn't in the beta, so that shows that it's def the combination between AAU1 and the latest update, no matter which was installed first.

4 minutes ago, Farlis said:

Are you 100% sure? I was in the beta of AAU1 and as soon as the last update for the 737 dropped from PMDG, which included a new ground handling, I noticed this behaviour.

I'm sure and I wasn't in the beta and now the beta is not a beta and I have it it has showed up. Perhaps it's a thing related to this update as I suspect then.

This is not the cause from that AAU1 update, i did not know it was any other since - this is on the PMDG side and have to be fixed from them..

cheers 😉

Edited February 3, 20233 yr by pmplayer

3 hours ago, spitzer45 said:

Yes. You have to really slow down to establish tight turns. Is this normal?

Just think about it:  you have a 80 ton load with awesome power and you can turn the nose wheel up to 75 degrees--you need to moving real slow for this!

4 minutes ago, pmplayer said:

This is not the cause from that AAU1 update, i did not know it was any other since - this is on the PMDG side and have to be fixed from them..

cheers 😉

Well it was fine before the update and broken after it. Given that PMDG did not release an update in the same time and I am using the same aircraft version that was working just fine before the AAU1 update I would say that the update borked something up. Absolutely nothing else changed in my config. I flew a flight. Updated the sim. Got in the plane again and it was comically not the same.

@Jazz @Farlis Can you check something for me? I just found out that this "skidding" only happens when I deflect the tiller too much (like max deflection), you can literally see the NWS skid along like on ice. When I deflect less I can get fine through tight turns, even at 15 kts. The AAU1 might have added some "skidding" friction mechanic which is being used by the latest PMDG update, this would explain why I didn't see this behaviour before installing AAU1.