Torque on Me 262?

[greybeard_52]

The Messerschmitt 262 in this game has a strong tendency to yaw to the left at the beginning of the takeoff phase. I suspect this is due to the usual "single-engine, propeller-driven" problem underlying the Rise of Flight flight model, and thus this simulator. I would therefore ask the developers to correct this anomaly.

[JFS4_Eisbaer]

[greybeard_52]

@JFS4_Eisbaer Obviously, rudder trim is ALREADY set to zero. Nevertheless, aircraft wildly yaw port. It is evident tha's a consequence of exaggerated giroscopic effect of rotating elements inside engines (compressor+turbine), dealed as big props: indeed, if you throttle up to 6000 RPM before releasing brakes (instead to accelerate from a standstill) the tendency to go left of the Me 262 is quite reduced. But I don't think you can understand these things.

[AndyJWest]

I fail to see how gyroscopic forces could cause an Me 262 to yaw at all on the takeoff run, since it has a tricycle undercarriage, and accordingly, gyroscopic precession won't come into it. If the aircraft is yawing (can't say I've noticed), something else may be causing it. Wind? A brake partially on?

[LukeFF]

Just ran a check with calm winds, hands off my rudder pedals and stick, just applied 100 percent power. The plane showed no tendency to yaw at all.

 

You either have a controller problem or have some crazy crosswind.

[Ghost666]

Before you power up. Have you check the position of your front wheel to see if it is straight?

[greybeard_52]

12 hours ago, AndyJWest said:

I fail to see how gyroscopic forces could cause an Me 262 to yaw at all on the takeoff run, since it has a tricycle undercarriage, and accordingly, gyroscopic precession won't come into it. If the aircraft is yawing (can't say I've noticed), something else may be causing it. Wind? A brake partially on?

In fact, from my point of view, the error is twofold: not only is the torque excessive, but it is applied as if the undercarriage were conventional (taildragger), and therefore with a VERTICAL component. This results, when the engine revs higher, in a vertical component of the gyroscopic effect.
I also tested in a completely windless environment (quick start).
My joystick appears perfectly centered, including the rudder, both in the Windows tests and within the game (settings), and I cannot detect any brake jamming. Furthermore, I have absolutely no similar problems with the jets of IL-2 '46, XPlane11, and Falcon 4.0 BMS.
I can't even imagine how the problem could be related to my system; as for me, I fear the issue will remain unresolved.

[AndyJWest]

I'm not convinced your problem is anything to do with torque. More likely you are having issues due to the quirky (and possibly unintended) behaviour of the nosewheel. See the specification:

 

 

What this doesn't explain is how you deal with the situation where the wheel is canted over, pulling you to one side, and won't straighten. The trick is to apply the nosewheel brake, while using toe brakes to pull yourself straight. This makes the nosewheel skid, rather than pull you to the side. Once you are running straight, release the nosewheel brake, and the nosewheel should align itself. Awkward, but once you get used to it, manageable.

 

 

[greybeard_52]

@AndyJWestSincere thanks for your detailed suggestion. I would try it, but I can't find any key set for nosewheel brakes only; when I press the corresponding control, ALL brakes are activated (including the nosewheel). I can only operate the toe brakes separately.
I did, however, make one mistake when trying to apply the brakes differentially via the rudder; I later discovered that they are controlled with "comma" and "period" on the keyboard.
In any case, I found confirmation in a Requiem tutorial of what I had already realized: that you need to rev the engines up to 7000 rpm BEFORE releasing the brakes; this greatly reduces the wandering when the aircraft starts.
The fact remains that if there's an effect, there must be a cause. So, if the nosewheel is straight (and it is, I checked; when you enter the simulation in "runway" mode, it's always like this), the engines are paired, no brake is locked, the joystick is calibrated, and there's no wind... What is it, physically, that causes the plane to yaw?
It seems to me to be another expression of this widespread "uncontrollability on the ground" that is so peculiar to this game; I've even read on this forum a real pilot, with great experience, complaining about his unreality, asking for a fix with the confident tone of someone who knows what he's speaking of.
Anyway, thank you all for your patience and kindness in trying to help me.

[LukeFF]

You are really making this more complicated than it needs to be. 🙂

 

To reiterate what I wrote above: start a mission on the runway with no wind. Don't touch your rudder pedals or flight stick and just apply full throttle. The plane will track straight down the runway with no tendency to yaw. If your plane is not doing that then you 100% have a controller/key bind issue somewhere. It's not a problem with the physics engine used by the game. 

[giftgruen]

Agree here. "My" 262 runs straight like on rails.

Needs RPMs before unlocking brakes, a long runway and a "soft" takeoff - yes - but otherwise it's quite easy to start.