Failure : try to add horizontal foil resistance

The biplan got totally out of control.

godot/component/entity/vehicles/biplan/biplan.gd

@@ -7,7 +7,8 @@ const PLANE_FORWARD := Vector3.BACK # z increases when moving forward
 @export var turn_to_torque: float = 1000.0
 @export var move_to_pitch: float = 2000.0
 @export var wing_resistance: float = 2500.0
-@export var foil_resistance: float = 250.0
+@export var horizontal_foil_resistance: float = 125.0
+@export var vertical_foil_resistance: float = 250.0
 @export var lift: float = 50.0
 
 var target_torque: float = 0.0
@@ -16,6 +17,7 @@ var target_rotation := Vector3.ZERO
 var target_thrust := Vector3.ZERO
 
 @onready var HorizontalFoil : Node3D = $HorizontalFoil
+@onready var VerticalFoil : Node3D = $VerticalFoil
 
 
 func trigger_thrust(activate: bool) -> void:
@@ -66,9 +68,21 @@ func _apply_wing_resistance() -> void:
 
 
 func _apply_foil_resistance() -> void:
+	_apply_horizontal_foil_resistance()
+	_apply_vertical_foil_resistance()
+
+
+func _apply_horizontal_foil_resistance() -> void:
 	var foil_position : Vector3 = HorizontalFoil.get_position()
+	var vertical_speed = linear_velocity.dot(transform.basis * Vector3.UP)
+	var local_foil_force = Vector3.UP * -horizontal_foil_resistance * vertical_speed
+	apply_force(local_foil_force, foil_position)
+
+
+func _apply_vertical_foil_resistance() -> void:
+	var foil_position : Vector3 = VerticalFoil.get_position()
 	var horizontal_speed = linear_velocity.dot(transform.basis * Vector3.RIGHT)
-	var local_foil_force = Vector3.RIGHT * -foil_resistance * horizontal_speed
+	var local_foil_force = Vector3.RIGHT * -vertical_foil_resistance * horizontal_speed
 	apply_force(local_foil_force, foil_position)