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Build a Piper J3 Cub (Full Blueprints) : Free Texts : Free Download, Borrow and Streaming : Internet Archive
I can't really justify goin to a supercub but I think it would be fun to try something with more power.
That end of the motor is wide open so it is easy to blow out the metal dust by mouth or compressed air.
Air Enthusiast Quarterly 2 : 154—162.