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Old 05-26-2018, 12:10 PM   #1
renzo
 
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Default wooden propeller identification

dear all, I have a wooden propeller WW1, with the following markings:
n31678
200PS
BENZ
D295
S180
EDUL

Does any one know of which German aircraft this propeller belongs too? I have added a file with pictures. I think it could belong to a Friedrichshafen GII Bomber.
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File Type: pdf schroef 260518.pdf (1.72 MB, 19 views)
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Old 05-26-2018, 03:29 PM   #2
Dbahnson
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Beautiful item and nice to have the hub with it, which is rare. I'm hoping that Bob Gardner or pmdec will see this and try to identify it. Be patient.
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Old 05-26-2018, 04:15 PM   #3
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Hi,

Sorry, but no idea from me... Very strange metallic hub with 8 bolts on one side and, it seems, 16 on the other???

Hope Bob will know the brand and will have some date from the prop number.

Regards,
PM
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Old 05-27-2018, 07:16 AM   #4
Bob Gardner
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Good Morning Renzo,

Thank you for this data which I have added to my database.

I can't give you an exact answer. The Benz engine was widely used, particularly so by the Imperial Navy.

The serial number 31678 is very likely to be a Heine serial number. Alb CV II, LVG CV, DFW CV, and Alb JI aircraft all used the 200ps Benz engine with Heine props that had fractionally different dimensions from yours.

The Friedrichshafen GII used both the 200 and 225ps Benz. I have one Friedrichshafen G II recorded with a diameter of 2900mm, but not made by Heine.

So, my tentative answer is that your prop came from an Alb, LVG, or DFW CV aircraft.

With kind regards,

Bob
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Old 05-27-2018, 09:42 AM   #5
renzo
 
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dear bob,


thank you for your reply. I tell you a bit about the history of this prop.

My father, who used to be a doctor/surgeon, wa sin his spare time a pilot. He used to fly a Piaggio P149D (ex luftwaffe), an italian plane. He is so found of it that this plane actually is put on display in his own yard.
His colleague was found of motorcycles. He had an old propeller, which, according to him, was 'saved' by his grandfather during the first world war. My father had an old motorcycle so they swapped.


The grandfather lived near Roeselare, in a little town called Rekkem. There used to be two German airfields around Rekkem, and one of those airfield, the Friedrichshafen GII was stationed.

so now about the prop:

it's has a logo, which I couldn't find anything on the web (see annex), so I don't think it's a Heine prop. Does anyone has an idea what the logo is from?




Also it states EDUL, counterclockwise turning prop as seen from in front of the aircraft (German wisdom). What I found out is that most props have EDULZUG, tractor prop. So I think it's a pusher prop, hence the Friedrichshafen G II.

renzo
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Old 05-27-2018, 10:40 AM   #6
Dbahnson
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Renzo, I think your prop was used in tractor, not a pusher, configuration. It is a right hand rotation (that's the design, based on a screw, which comes in both right and left hand threads), so mounted on the normal Benz engine it would only work in tractor configuration. (That can't be changed by putting it on backwards. It's a consequence of its construction.)

See this prop just as an example of a right hand threaded prop stamped with "Edulzug".
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Old 05-27-2018, 11:00 AM   #7
renzo
 
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you might be right, still the logo is strange, any idea's?
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Old 05-27-2018, 11:31 AM   #8
Dbahnson
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I'm inclined to believe the stamp you see is an inspector's stamp rather than a logo, possibly with the inspector's initials.
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Old 05-27-2018, 12:57 PM   #9
Bob Gardner
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Renzo,

Only Heine had serial numbers in the 31,000 range. They started making props before anyone else in Germany c1910 and also made more props than anyone else.

For those who don't follow the minutiae of WW1 German aviation abbreviations, EDUL is the abbreviation of Entgegen Dem Uhrzeiger Lauf which translates as against-the-direction-in-which-the-clock-runs. Anticlockwise in English. EDUL almost always is accompanied by the word ZUG indicating pull or tractor; thus EDULZUG. A pusher prop would replace zug With DRUCK (sometimes DRUK) meaning push. But such props are extremely rare In German WW1 aviation.

With kind regards,

Bob
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Old 05-27-2018, 10:11 PM   #10
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Quote:
Originally Posted by Bob Gardner View Post
Renzo,

Only Heine had serial numbers in the 31,000 range. They started making props before anyone else in Germany c1910 and also made more props than anyone else.
Bob, don't you also think that it's rare to see a Heine prop with canvas clad tips?

It's a gorgeous prop. I hope it can be further identified.


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