I thought the plane was some just-for-fun pet project of yours. I find it very problematic up to unplayable to have a big and fast object that is difficult to steer in the game because it has been repeatedly shown that these types of objects do have big problems with the clonk landscape, get stuck, crash into a mountain and fit through through nowhere. The CR dragon and the Hazard shuttle required huge efforts to make them halfway playable (but only in wide landscapes). The blimp gets stuck very often dispite its very low speed.