Customized version of http://www.thingiverse.com/thing:924438

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=924438

Using the following options:

lengthOfBlades = 125
angleOfBlades = 25
thicknessOfBlades = 2
numberOfBlades = 6
diameterOfBarrel = 50
widthOfBlades = 30
heightOfBarrel = 15
$fn = 30