(this project is dead and has been replaced by: http://www.thingiverse.com/thing:1339735 )
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Not meant for blowing, but for suction; with its rear exhaust design that has yet to be fully tested. In theory, it should reduce drag.
Use small wood screws to attach the motor mount to the housing.
The turbine is made for a 2mm motor shaft. If you need a different shaft diameter, send me a message and I will edit the turbine file and upload a variant.