Prop blade ID help, please

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The Freeman Army Airfield Museum in Seymour, Indiana, USA, has been cleaning up a WWII propeller blade. There is lots of information on the hub end of the blade, but the person who has been working on it is unable to "connect the dots"; that is, figure out what airplane/engine the propeller came from. Can anyone here help us? Thank you. A picture of the hub end is attached.
Unknown prop blade 1.JPEG
 
The 9-12004.10 indicates it is almost certainly from a Bf109F-3 or -4 airframe (or maybe a -5 & -6 reconnaissance variant?) with the DB601E engine. I say almost certainly because there may have been airframes that used the same prop/prop blades as the Bf109F-3 or -4 that have not yet been documented, or that the documentation has been lost. However, the information indicating it is from the Bf109F-3 or -4 is from official RLM documents.
 
The symbol W.Nr. indicates it is a German blade as it stands for Werk Numer with the serial No. of the blade. There are those here who will be able to tell more.
Thank you, Special Ed. I'll have patience and wait to see if others on the forum come up with additional information. That blade was buried out here for some 50 years, and has been in storage for another 30 years awaiting cleaning and identification. We are interested, but in no great rush.
 
Very nice Larry!
I agree, this 9-12004.10 is a blade from a Bf 109 F-3 or -4. This was designed for the new DB 601 E engine with a larger diameter propshaft spline and with the integrated VDM pitch change drive as part of the front engine case, rather than the earlier versions with an external VDM gear unit bolted to the front of a DB 601 A or N. The new Hub assembly was the 9-12010.21 and the complete propeller assembly (gerät) was a 9-12010 A. The overall prop diameter was 3.0m.
I see your photo shows the blade on a hub with a backplate. I can help with hub Identification, decode and location of the stamped data if you wish?
This blade is only listed for the Bf 109 F-3 or -4, but those aircraft types could also be fitted with the slightly later Bf 109 G prop type 9-12087 A. The VDM manual says that the F-3/4 had to have rear cooler armour to have the G propeller. However, I understand that the Bf 109 F-4Z (with GM-1 high altitude power boost) also had the 9-12087 A prop.
Please ask if you want more info.

Eng
 
Very nice Larry!
I agree, this 9-12004.10 is a blade from a Bf 109 F-3 or -4. This was designed for the new DB 601 E engine with a larger diameter propshaft spline and with the integrated VDM pitch change drive as part of the front engine case, rather than the earlier versions with an external VDM gear unit bolted to the front of a DB 601 A or N. The new Hub assembly was the 9-12010.21 and the complete propeller assembly (gerät) was a 9-12010 A. The overall prop diameter was 3.0m.
I see your photo shows the blade on a hub with a backplate. I can help with hub Identification, decode and location of the stamped data if you wish?
This blade is only listed for the Bf 109 F-3 or -4, but those aircraft types could also be fitted with the slightly later Bf 109 G prop type 9-12087 A. The VDM manual says that the F-3/4 had to have rear cooler armour to have the G propeller. However, I understand that the Bf 109 F-4Z (with GM-1 high altitude power boost) also had the 9-12087 A prop.
Please ask if you want more info.

Eng
Thank you, Engineman. I passed the info along to the person who is working on the propeller project. In due time, the prop blade will find it's way into our Bf-109/DB-601 display. I'll post a picture when we get that far.

The reason it has taken me so long to acknowledge your detailed reply to my request is that tomorrow is our annual Museum Airplane Ride Day fund-raising event. I have been very busy with arrangements to put this thing on. But please know that our museum greatly appreciates your help.
 
Hi Larry,

Thank you for your generous reply. I hope that your Museum fund-raising day goes well!
Please don't hesitate to ask for more info. The Bf 109 F-4 blade is fairly rare as it was bespoke to that version with the DB 601 E engine. The prop hub on the F-4 was also only applicable to the F-4 and it should be the 9-12010.21 hub. Surprisingly, that hub was not used on the Bf 109 G with the same propshaft and VDM gearing, nor on the versions of Bf 110 with the DB 601 F engine which also has the same propshaft and VDM gearing.
I look forward to any more queries!

Eng
 

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