I've included full models of the turbine and fan in addition to sliced versions for easier printing. You can reduce the number of fan blades, reverse them, or attach a motor/anything else you'd like.
I recommend printing in ABS with .2 layer height and 30% fill.
The rack gears function as the battery weight, so it might be a good idea to print them at 100% fill, and/or attach additional weight to the gear to increase torque.
Let me know if you have any questions!