http://www.mikrokopter.de/ucwiki/en/MikroKopter

Electric N rotor DIY copters capable of good control and load carrying
related to the $ you are prepared to spend on power systems.

Looks to have reached the "reasonably capable" stage.
One of quit a few similar opens ource projects.

Deutsch, Slovensky & English pages.
English is a subset of the main site.

_helicopter _copter
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