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Old 08-10-2019, 12:21 PM   #11
Dbahnson
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Bob may be correct about the 1920s. I've looked through the list of Type Certificates and could not find ATC 87 listed, but there are very few two digit Type Certificates, as most are three digits. So my guess is that this one was approved early on in the type certification process, although I don't know when that was instituted for propellers.
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Old 09-17-2019, 06:48 PM   #12
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Default Finally picked it up

Hi All! I posted 1-2 months ago. I bought a prop at an auction that my wife had to have. Finally picked it up. Here are additional pics. Hope someone can finally figure this out
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Old 09-18-2019, 10:42 AM   #13
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Emerson,

The data should be stamped on the side of the hub. I need it to identify the drawing number and hence the aircraft for which it was designed.

The shape of the prop with the trailing edge describing a straight line through the hub is in the style of Lucien Chauviere, who was the founding father of propeller design. It might therefore be made by his company, the Integrale Propeller Company, although several other prop makers followed his ground work.

With kind regards,

Bob
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Old 09-19-2019, 03:28 PM   #14
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Please see pics for the only markings on the prop. Thanks
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File Type: jpg 33701B1E-D4F1-403D-BE9A-499C27DE398F.jpg (93.5 KB, 6 views)
File Type: jpg C8AA63D3-D474-4AA0-845E-0460DBBE433B.jpg (91.0 KB, 5 views)
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Old 09-20-2019, 08:17 AM   #15
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Emerson,

I regret that I have nothing similar in any of my databases, so cannot advise. However, I think those markings are British and date from the 1920's-1930's.

Perhaps one of our experts, Pierre Michel Decombeix in France, or Dave Bahnson in America will be able to help.

With kind regards,

Bob
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Old 09-20-2019, 11:42 AM   #16
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I don't know where else to go. I can't find a listing with that ATC number and we don't know the manufacturer. Without those there are just too many possibilities.
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Old 09-20-2019, 03:12 PM   #17
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Default Found a symbol

Just found this in the metal portion of the wing
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Old 09-20-2019, 05:36 PM   #18
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That's a good find, and suggests (as Bob said earlier) that it's from the 20s or 30s when Paragon continued to manufacture propellers after WW1. It probably also had decals which have since been removed.
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Old 09-20-2019, 05:39 PM   #19
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Default Found symbols

I think it is a paragon. Stamped on metal on 4 sides.

Wondering what other words are? Can year be identified by stamp?
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File Type: jpg D21CB4DA-1E16-4D5E-BE17-4A21023182AB.jpg (103.3 KB, 7 views)
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Old 09-21-2019, 08:04 AM   #20
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Interesting that Paragon in America was making a propeller so close to a design of Lucien Chauviere in the inter-war years.

With kind regards to everyone,

Bob Gardner
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