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The WW1 modelers' reference library => Engines => Topic started by: Bughunter on June 19, 2021, 11:00:08 PM

Title: Question: Oberursel U.II
Post by: Bughunter on June 19, 2021, 11:00:08 PM

Does anyone have an idea or a picture of what the Oberursel U.II looked like?
I do not mean the Ur.II, which looks nearly like a Le Rhone 9J.

See the list here: https://en.wikipedia.org/wiki/Motorenfabrik_Oberursel#Engines

Thanks,
Frank

Title: Re: Question: Oberursel U.II
Post by: RLWP on June 20, 2021, 02:25:57 AM

According to The Aerodrome it was an experimental two row eighteen cylinder radial. Pretty low horsepower for 18 cylinders

Richard

Title: Re: Question: Oberursel U.II
Post by: Bughunter on June 20, 2021, 09:42:28 PM

Thank you very much!
In the Wikipedia list is a link to the "Airplane Engine Encyclopedia", both mention a 18 cylinder with 200hp, but do not name it.
This makes sense, the U.III was a two row Lambda-Lambda copy.

I have a book about the Steyr-Daimler-Puch AG in Austria from 1864 to 1918. There are nice pictures of the production of a license built Gnome with 11 cylinder, 160hp and 191kg. May be it is derived from the Oberursel Ur.III ? The text call then Gnome, but the look more like a Le Rhone with intake pipes and valve rocker on back side.
On of the aircrafts using this was the Aviatik 30.40 and 30.27. In the "Austro-Hingarian Army Arircraft" of WWI this engine is rated with 150hp.

Cheers,
Frank