Unsymmetrical distribution of blades

[Mano]

how can i make the Unsymmetrical distribution of blades(the zipline type)

[Mano]

also uneven blade lengths 

[Brandon Litherland]

You can achieve asymmetrical blade distribution, or non-uniform blade distribution using the More tab and changing the blade spacing. To achieve two identical blades in an unbalanced configuration, you'll have to use Free mode. The Zipline prop will require a separate geom to act as the balance.  Fully unique blades (different length, lofting, etc.) will require multiple Prop geoms and then change the Design > Rotation parameter to position the blades.