Prop boss

[Geertse]

This one is a rare one.
Hub is 25 laminations
Blades are 16 laminations
Text is hard to read:
What I can see is :
On the side
13118
ColleBC 1
On the front there's:
CJ , 1,21,2 and 562
Id please??
Greetings,

[Bob Gardner]

Geerste,

I don't know. Can you post some photographs?

Bob

[Geertse]

pictures added

[Geertse]

another picture

[Bob Gardner]

Good Photos Geerste,

But it doesn't help much.

It looks German from c1918 but I can't read any of the data. The elongated hub is a feature I haven't seen before.

With kind regards,

Bob

[Geertse]

There's an old thread where a similar marking appears on the hub.
It's from a salmson airplane.
But the prop itself doesn't match.
Greetings,

[Geertse]

Sorry it's a picture on the site where you can also see Colle...... On the hub.
It's on the French prop gallery.
salmson A2A
Grtz

[Geertse]

I've seen a similar prop from ratmanoff but could not read the markings.
It has an equal amount of layers and the same color.
The owner told me that is was for a Spad.
Could someone confirm this please?
What type the prop is?
See pictures.
Greetings,

[pmdec]

Hi,

I think the markings above 13118 are "SERIE NUMERO 2".
If this is right, the prop diameter has to be 2,48 meters, with a 188 millimeters blade width, a 70 millimeters central hole and 150 millimeters hub thickness. And there is to be fabric between laminations: It is very easy to see it with a magnifier or a close up picture.

For the other French prop hub, I can't tell anything more without large and clear pictures without flash, as asked.

Regards,
PM

[Geertse]

Hello,
You're right.
It's 70mm central bore and 150mm thickness.
And between laminations there could be some sort of fabric or it might be glue.
What airplane was it used on ,and the period please?
Greetings and thanks for the info.
Whats the type of propeller then?

[Geertse]

As seen on previous post it could be a de La Granville prop as mentioned by pmdec.
Only difference is that there are 25 equal laminations.
Not 2 thicker ones on the front and rear.
But serie numero 2 is certain and I also seen the french aps stamp in a square.
Grtz

[Dave]

Eclair made a Serie 2 propeller for a Caudron G3 and a Nieuport XII, both using a LeRhone 120 HP engine. It also fit the Clerget 110 HP engine for the Sopwith A2. Gallia had s Serie 2 prop for a SPAD VII with a HIsso 180 HP engine.

Check this page and see if your prop has DIFFERENT hub dimensions. If they are different, then it's not any of those aircraft.

[pmdec]

Hi,

If "SERIE NUMERO 2" is stamped above the prop number, it has to be a SHAM 2 for Spad 7, as Geertse read on the other thread.
But I can't see the large omega Greek letter from De La Granville. So, may be, it was made by a subcontractor and it is why it has all the laminations thin and not the two thicker on each side. Those two thickers lamination were used because De La Granville don't used hard wood and this one seems to be made with all layers in hard wood (two different species), which made it possible to use the same wood for the two sides in contact with the metallic hub.
The prop number is very high, and the prop probably made in 1919 or later. Spad 7 were used after the war finished: Ratier sold props for Spad 7 until the end of 1924.

Regards,
PM