Prop blade id
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The base looks quite small, so I'm thinking it's a two- or three-bladed propeller, fairly light, like on a reconnaissance or interwar aircraft, given the state of corrosion on the blade.
Does anyone have any idea what propellers a Noorduyn Aviation Norseman might have?
Michael Hope
Airman 1st Class
- 263
- Jun 28, 2016
The Norseman used the Hamilton Standard 3D40, or a 12D40.
The image of the blade butt shows a brass/bronze type internal plug, but it is large in diameter to be from a Hamilton Standard blade. Below is a cut away, which shows the blade, bronze blade bushing and the steel spider arm. The end of the threaded balance plug is seen in the center.
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So, after taking a close look at the end of the blade, we can see that it's been sawn off... so the idea of a light aircraft is fading. I think we're looking at a Hamilton or DH propeller, or some other WWII propeller, that's been cut from the rotor.
The maximum width is 24 cm, so normally bombers are excluded.
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Hi,
Unfortunately, you are getting so far away from identifiable features that it may be impossible to even group that blade.
You might, possibly, have some sort of blade shape at the lower area, but really, it is so badly corroded that it looks unlikely that original profile remains?
It does look as though you only have the alloy material and a steel insert to bank on.
Good luck. It is just possible that the form and size of the steel insert is individual enough to group the blade.
Cheers
Eng
Unfortunately, you are getting so far away from identifiable features that it may be impossible to even group that blade.
You might, possibly, have some sort of blade shape at the lower area, but really, it is so badly corroded that it looks unlikely that original profile remains?
It does look as though you only have the alloy material and a steel insert to bank on.
Good luck. It is just possible that the form and size of the steel insert is individual enough to group the blade.
Cheers
Eng
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- #8
Hello. Thanks for the feedback. It's clear that it's very, very complicated, perhaps even impossible. My many years identifying objects from sunken ships have shown me that you always end up finding something or someone who solves the mystery. It's just a matter of patience
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