In this new link, stp, dae, dxf, mb(maya2022) files are also provided.
This is the free version of the same model.https://www.cgtrader.com/free-3d-models/industrial/other/airship-c7e44fe5-b1ac-423e-99a9-e00025f53372 Be noticed, in some formats this model is a little bit far from the central axis, but in the mb file, the model is in the center of the scene.This is a triangle model. There are only materials in this model, the pictures are rendered by arnold and keyshot.Please allow me to charge a little. :-P