Dear Aviation Historic Forum,
I am attempting to identify a propeller I have and I require some assistance.
I have small JPEG’s of the prop, stamp numbers, stamp letters and ID number I can send you.
She stands 61 inches tall and is quite heavy.
On the flange there are stamped numerical numbers:
71.9
And then letters:
M and O
I removed the gear and found on the inside what looks to be an identification number and a logo stamp.
Here is the identification number:
528 – S – 1444
There is a logo between the 8 and the S.
Hopefully you will be able to tell me a bit of history!!
You may contact me at [email]brroyer@cox.net[/email]
Thank you so very, very much!!!
Bruce Royer:)
By: Shadoko - 31st March 2025 at 11:26
Hi,
I am a new user of this forum and I discovered this old post browsing pages.
I am pretty sure the stamp just left of S1444 is a Chauvière stamp : there is exactly the same C and wing on wooden Chauvière propellers decals ( for example, this one : http://inlinethumb52.webshots.com/9011/2928067850101100647S600x600Q85.jpg )
So the blade has to be a Chauvière serial 1444.
Sorry for my frenchie English,
Regards,
PM
By: MerlinPete - 7th February 2009 at 21:53
Heres another pic and enlargements of the two inspection stamps digitally enhanced with the aid of modern technology, my kids 🙂
Pete
By: Arabella-Cox - 7th February 2009 at 19:56
Prop i/d
Had a chat with Merlin Pete today and we have discounted the Curtiss prop idea. We wondered if it could be a French Ratier propeller but neither of us know the internal working arangements of these props to know whether it is or not.
With the gear not being bevelled the blade pitch must have been altered via a geared rack-type system, i.e. a push-pull action from a hydraulic piston (like the Shackleton de-H propeller).
It could, possibly, be from a contra-rotating Curtiss (as the blade profile looks similar) because this would need a rack pitch change but I do not have any technical details of this type of propeller either.
What are the symbols before the “S” and within the hexagonal-shaped stamp?
Either of these may be a manufacturer’s logo.
Anon (and Merlin Pete)
By: Creaking Door - 6th February 2009 at 23:50
Strange that the gear isn’t bevelled and that it is a complete gear rather than just a geared sector; makes it look quite crude or early but then the prop is metal (as opposed to wood).
By: Arabella-Cox - 6th February 2009 at 23:33
Prop blade i/d
Hmmmm.
I’m thinking Curtiss Electric type prop – but without the pre-loaded bearing pack which would be fitted before it is fitted to the hub.
It’s a bit late now but I’ll dig out some of my old manuals over the weekend and have a looksee to confirm this – or not.
Anon.
By: MerlinPete - 6th February 2009 at 23:21
Here are some of the pictures from Bruce.
I have to confess it is not a make of blade I have ever come across, so I am going to be of no help at all!
Anyone else?
Pete
By: MerlinPete - 5th February 2009 at 19:04
Hi Bruce
Welcome to the forum! 🙂
If you have removed a gear from the blade root then it sounds like a Hamilton-Standard or de Havilland type. The numbers don`t ring any bells with me though.
e-mail sent regarding photos.
Pete
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February 5, 2009 at 5:46 pm