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Whenever I select Intermediate or Beginner flight models, the engines on the aircraft have no power. The engine sounds like the when the AI planes are "cleared to land" where it has high RPMs and sounds like a high buzzing sound. However, there is no power, not enough to take off or fly. I'm not sure if this is a HASP issue that requires you to use only the Authentic FM, but I'm not sure. Has anyone else experienced this? Is there a solution to this?