German Prop Behrendt+Rüggebrecht

[Gehrmann]

Hallo, I have a wooden propeller and looking to get some informations about it.
For whitch motor or aircraft it was used, year of make etc.
Name and spezifications are:
Behrendt + Rüggebrecht
Berlin N20 (Germany)
N 5479
D 2850 ST 158
Druck
?850 145 160
The prop is made by two different kinds of wood with
copper-"plates" on the tips
Can anybody help me?
Thomas Gehrmann, Germany

[Dave]

That's going to be hard, I think. The copper sheathing suggest that it might have been made after WW1, but even that's just a guess.

[Bob Gardner]

Sehr geehrter Herr Gehrmann!

This prop is most unusual in that it is a pusher prop, indicated by DRUCK on the hub and confirmed by the metal cladding on the tips. There were very few pusher aircraft in Germany in WW1; only the Zeppelin-Staakens and the Gothas, and this prop is unlikely to be from one of them.

The diameter of 2850mm and pitch of 1580mm indicate that this prop was for a particularly slow aircraft. The engine was probably the 160ps Mercedes engine. And it dates from 1916-1917.

Almost all German props were made to dimensions laid down by the Prüfanstalt und Werft der Fliegertruppe (the Test Institute and Workshops of the Flying Troops) and published in the P&W Propellermerkbuch but there is no prop listed of these dimensions, which suggests yours is out of the ordinary.

I have added the details to my database, for which many thanks.

With friendly greetings,

Bob

[Gehrmann]

Dear Bob,

thank you for these informations. Is it possible that these prop
was not used in a military aircraft but in a civil aircraft? (Did civil aviation
exist in this era ?)
Do you have any informations about the company Behrendt&Rüggebrecht?
Maybe the producer can help.

Kind regards
Thomas