modeled in 3ds max 2009 and used vray.
obj, max 2009, max 2012 and max 2014 file formats included.
real world scale.
x,y,z : 0,0,0
note: depending on which software package you are using, the exchange formats (.obj) may not match the preview images exactly. Due to the nature of these formats, there may be some textures that have to be loaded by hand and possibly triangulated geometry.
Apr 20, 2018date added
Dec 17, 2018last update
I used this in obj so it needed a little work to make it perfect (as mentioned in the description), but it was used to build a more complex flying machine, so I was very happy. I just wish these flying objects had a choice of blurry propellors so they look like they are actually spinning. Overall, a good investment.