Helicopter 3D model 20 3D model is available on CGTrader for $3. Original author: 3DDigitalFiles.
STL (Stereolithography, filesize: 174 KB), OBJ (OBJ, filesize: 498 KB), IGE (IGES, filesize: 1.01 MB), SAT (3D ACIS, filesize: 796 KB), STP (STEP, filesize: 575 KB)