2 engine variant of the famous Huey Cobra made for Marines, because they weren't allowed at the time to use Apaches, but still want 2 engines.
for 1/285 scale,, just use a clear plastic disc for the rotors.
the main rotor is 51.25mm diameter
the tail rotor is 10.5mm diameter
model in full dimensions in blender 2.80 and exported from blender 2.79b* at 1/100 for the .stl file
scale down to 35% in the slicer.
I've had issues exporting .stl's from 2.80 for Cura; 2.79b and 2.80 export the same mesh to different file sizes, too. So I export the mesh from 2.79b for consistency's sake.
as usual, the d6 is 15mm for reference
( yes... I need to totally redo my slicer profile)
YIKES, I had the wrong scale... 10 times too small
ver 2 of the mesh should fix that