Ultralight One-Piece Whirlybird
There are already a number of hand-powered helicopters entered in the Make It Fly contest (like this , and this , and this , and this and this ), so why add another? Well, I was intrigued by these new toroidal rotors (all the cool kids…
Print approx. €0.39–€0.48 excl. taxPreliminary estimate for one variant
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