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-   -   Paragon prop info needed (http://woodenpropeller.com/forumvB/showthread.php?t=3446)

Glenski 03-18-2016 10:01 AM

Paragon prop info needed
The one I have is about 75 inches long with 6 bore holes. The markings on it are DES-5-G and 5056-1. I was told this was made in the Argus factory, but I don't know for certain. There are a few scratches on it, but otherwise in very good condition, and I want to know any details on it that you know, plus how much it's worth (and how I can verify that amount to any buyer).

Thanks in advance.

Dbahnson 03-18-2016 11:06 AM

You need to start with a photo, as no one is able to even begin to know value without knowing condition and authenticity.

We also need to know exact length in inches, and also the hub dimensions if you want to try to narrow down the engine.

It may be very hard to identify with any certainty. Records seem to be absent from that manufacturing era.

Glenski 03-18-2016 08:50 PM

Ok, will get that information and post it here. Thanks for such a fast reply.

EDIT: By the way, I looked at that link you provided on hub dimensions. Good info to know, but it's only for props with 8 bore holes. Mine has 6. I'll still provide info, but I hope someone has a similar table to match up a prop with 6 bore holes. Many thanks again in advance.

Dbahnson 03-18-2016 11:29 PM

Usually the 6 bolt hole hubs are more modern propellers. There is less specificity that matches hub pattern to engine use, but sometimes at least there are certain engines than can be ruled out as possibilities.

Glenski 03-20-2016 01:58 AM

The name on the propeller is Paragon. It is 75 inches long, the thickness (depth of the hub) is 4 inches. The hub's diameter is 2 1/4 inches and the bolt holes are 5/16 inches in diameter.

I'll look into what I have to do to post pics soon. My family has the prop now, too far from me to visit, and I'm dealing with not the best photographers.

Glenski 03-20-2016 02:17 AM

Sorry the full length was not shown. Three lengthwise scratches on the left blade.

Showing the Paragon label and general condition that the whole prop has, other than those scratches and some around the hub.
Color enhanced close-up showing one set of numbers. Sorry they are upside down. They are not that way in my original pic.

Dbahnson 03-20-2016 08:19 AM

Interesting. It resembles a "typical" modern style propeller, as might be used on small trainers like Cubs, Taylorcrafts, Luscombes, etc. but it's a left hand thread, which is unusual for that design and length.

I'm not sure where one would go from here to identify it further. I'd probably try to contact the librarian at the National Air and Space Museum in Washington, DC.

Glenski 03-20-2016 10:09 AM

Thanks! I've just sent an email inquiry to Dr. Peter Jakab there, Chief Curator, Administration, Early Flight and World War I Aviation.

Dbahnson 03-20-2016 10:51 AM

Let us know what you find. I suspect he will enlist another curator, maybe Jeremy Kinney in Propulsion, but if they are able to dig something up it would be great to be able to post it here.

Glenski 03-26-2016 10:17 AM

You were right. Despite my sending email to Jakab, Kinney's assistant curator replied (with Kinney CC'd). I inquired with relatives and learned that my grandfather had worked for Bendix Aviation, not Argus (which Kinney's assistant doubted anyway because they are in Germany, and my grandfather probably never lived there).

Will update you as I learn more.

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