Documentation tweaks

Author: SteelFill

Source/Documentation/Manual/features-rollingstock.rst

@@ -437,8 +437,10 @@ should use the articulation behavior.
 To forcibly enable the articulation behavior at the front of the rail vehicle, use
 ``ORTSFrontArticulation ( 1 )`` and at the rear use ``ORTSRearArticulation ( 1 )``.
 Conversely, use ``ORTSFrontArticulation ( 0 )`` or ``ORTSRearArticulation ( 0 )`` to
-force disable articulation behavior. Entering a value of -1 provides the default
-automatic behavior.
+force disable articulation behavior. Articulation should generally be enabled on the
+'floating' end(s) of a vehicle, where a bogie or wheels are not present in the 3D
+model, and disabled on the end(s) that have wheels. Entering a value of -1 provides
+the default (automatic) behavior.
 
 Freight animations and pickups
 ==============================

Source/Orts.Simulation/Simulation/RollingStocks/TrainCar.cs

@@ -2735,7 +2735,7 @@ public void SetUpWheels()
             // and the rest left out.
 
             // Force articulation if stock is configured as such
-            // Otherwise, use default behavior which gives articulation if there are no axles forward/reareward on the mode,
+            // Otherwise, use default behavior which gives articulation if there are no axles forward/reareward on the model,
             // disables articulation on engines, and only allows articulation with 3 or fewer axles, but not 1 axle
             bool articulatedFront = (FrontArticulation == 1 ||
                 (FrontArticulation == -1 && !WheelAxles.Any(a => a.OffsetM.Z < 0) && WagonType != WagonTypes.Engine && WheelAxles.Count != 1 && WheelAxles.Count <= 3));