Jan,
I am not knowledgeable enough about Gnome engines to answer your question but the German version was made by Oberursal (the town where it was made) and called the U I. The Oberursal copy of Le Rhone engine was the UrII, I believe. I understand that the French built engines were better than the German copies so captured Gnome and Le Rhone engines were much prized and immediately put into German machines, usually those of the aces.
This might explain why some German props are marked for Gnome or Le Rhone but most for the Oberursal I or II.
Bob
I am not knowledgeable enough about Gnome engines to answer your question but the German version was made by Oberursal (the town where it was made) and called the U I. The Oberursal copy of Le Rhone engine was the UrII, I believe. I understand that the French built engines were better than the German copies so captured Gnome and Le Rhone engines were much prized and immediately put into German machines, usually those of the aces.
This might explain why some German props are marked for Gnome or Le Rhone but most for the Oberursal I or II.
Bob
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