AddRelativeTorque not rotating about Y axis correctly

Questions & Answers
1

I have a spaceship model I’m trying to pitch, roll and yaw using AddRelativeTorque. Pitching around the X axis works correctly but when it comes to adding yaw around the Y axis the model rotates around the Z axis and the Y axis. The same happens when I try to roll about the Z axis.
I have set the center of mass to (0,0,0) hoping this might solve it but it makes no difference.

Is this likely to be something to do with my model or my code (see below)?

var centreofmass : Vector3;

function FixedUpdate () {

rigidbody.centerOfMass = centreofmass;

	
	//Upward Thrust
	if(Input.GetKey("up")){
		
		rigidbody.AddRelativeForce(Vector3(0,upThrust,0));
		
		}
		
	//Downward Thrust
	if(Input.GetKey("down")){
	
		
		rigidbody.AddRelativeForce(Vector3(0,downThrust,0));
		}
		
		//Left Thrust
	if(Input.GetKey("left")){
		
		rigidbody.AddRelativeForce(Vector3(-upThrust,0,0));
		}
		
			//Right Thrust
	if(Input.GetKey("right")){
		
		rigidbody.AddRelativeForce(Vector3(upThrust,0,0));
		}
		
		//fwd Thrust
	if(Input.GetKey("left shift")){
		
		rigidbody.AddRelativeForce(Vector3(0,0,fwdThrust));
		burnFuel();
		}
		
			//bckwrd Thrust
	if(Input.GetKey("left ctrl")){
		
		rigidbody.AddRelativeForce(Vector3(0,0,downThrust));
		}
		
		//Turn Left
	if(Input.GetKey("a")){
	
		rigidbody.AddRelativeTorque(Vector3(0,-rotateSpeed,0));
		}
	
	//Turn Right
	if(Input.GetKey("d")){
	
		rigidbody.AddRelativeTorque(Vector3(0,rotateSpeed,0));
		}
		
		//Pitch Up
	if(Input.GetKey("s")){
	
		rigidbody.AddRelativeTorque(Vector3(-pitchSpeed,0,0));
		}
		
		//Pitch Down
	if(Input.GetKey("w")){
	
		rigidbody.AddRelativeTorque(Vector3(pitchSpeed,0,0));
		}
		
		//Roll Left
	if(Input.GetKey("q")){
	
		rigidbody.AddRelativeTorque(Vector3(0,0,pitchSpeed));
		}
		
		//Roll Right
	if(Input.GetKey("e")){
	
		rigidbody.AddRelativeTorque(Vector3(0,0,-pitchSpeed));
		}
}
2

try AddTorque instead of AddRelativeTorque.

from api:

Adds a torque to the rigidbody relative to its coordinate system.

This makes me think your models axis are wrong perhaps. Try this and see if it helps.