Goedendag ;-)
Canard model, middle-motor, outrunner, contrarotating, coaxial ... did I forget anything? Yes, propellors in duct/shroud.
Patrizio Bronzi strikes again :-)
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Two more Bronzi pieces of art: blabla ... mit Verstellprop in shroud
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Variable pitch 'movie'
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Vriendelijke groeten ;) Ron van Sommeren near Nijmegen, the Netherlands