Problem with mesh particles : how to change their rotation axis ?

Hi everyone. I'm facing a problem I can't resolve.

I would like to create wind blowers for my game. The tornado effect is created with a particle system emitting meshes along its Y axis with a rotation over their lifetime. My problem is that I can't find any way to change the axis of their rotation. It is stuck on the Y axis even if I rotate the particle system. The tornado effect look good only if the wind blower is looking upward.

Here's a screenshot of my problem :



I can change the mesh of the particle system depending on its own rotation, fixing the mesh orientation when instantiated, but the particle rotation over lifetime is still based on the world Y axis.

Does anyone have a solution ?

Robin