Well, no one helped me with Dorand aircraft... (
https://theaerodrome.com/forum/showthread.php?p=777933)
Now I have other strange aircraft: In M.Dusing's book German & Austro-Hungarian Aero Engines of WWI. Vol.3 (very interesting Centennial serie) there is some confusions in the titles of photographs.
This photo captioned as "7 cylinder 35 hp rotating engine used on Wenskus' monoplane (1913)." but it is really an error, and was wrongly copypasted from photo from couple of pages earlier.
So, it is posted in Wunderlich engines section, and engine on this plane looks like Wunderlich. But all I can found with this engine is Hanuschke Typ Populaire I, and it seems that it is another aircraft. So, who knows, what is this airplane?