robin Balloon copter
thingiverse
A customized version of the thing can be found at http://www.thingiverse.com/thing:52421, which was created using the Customizer tool available at http://www.thingiverse.com/apps/customizer/run?thing_id=52421. Here are the specific options used in the customization process: balloon stem radius of 8, name plate top, name plate as "ROBIN", engine centers set to 160, propeller radius of 75, font "write/Letters.dxf", prop shaft radius of 3, turbine radius of 20, number of blades set to 4, and prop shaft height of 80.
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