Propeller blade to identify

[Kurtl]

Can anyone identify this prop blade? It's size is about 170 cm, but it's bendet a little. There is something like a weight balancer on the bottom. I don't know what this is either. Any help is apprechiated. Regards - Kurtl

 

[A4K]

Shape looked familiar, was thinking VDM from either 109G or Fw 190, so checked the net:

VDM 9-12153 A, 3.3 m circumference; one of 3 props authorised by BMW for Fw 190A/F/G series aircraft. Same prop as VDM 9-12067 A, difference being the external weights.

 

[vikingBerserker]

That's pretty sweet!

 

[Airframes]

Certainly looks like a late '109 blade, but not sure about those flanges, weights or whatever. Balance weights were normally disc-like, but of course there are/were variations.

 

[Kingscoy]

Hi,
I have seen several of these weights on Fw 190 props we excavated. I believe they counter act unwanted vibration in the prop.
Cheers,
Sander

 

[Airframes]

Good info Sander. Yes, the weights are for balancing the prop blade, and can be seen clearly on some props which don't have a spinner covering the hub. They are often in the form of a disc, rather like an ice-hockey puk, and are known as 'bob weights'.

 

[Kurtl]

Thanks Gentlemen for your interest. So those "weights" were used as counterweights if one prop blade has less weight than the other two, right?
I wonder if there is any manual about VDM that shows all different types of prop blades. What's the difference between VDM 9-12153 A and VDM 9-12067 A?

 

[FLYBOYJ]

Just a guess, but I would think the weights would also put the prop in low pitch should the prop fail in flight.

 

[A4K]

Thanks Gentlemen for your interest. So those "weights" were used as counterweights if one prop blade has less weight than the other two, right?
I wonder if there is any manual about VDM that shows all different types of prop blades. What's the difference between VDM 9-12153 A and VDM 9-12067 A?

.

According to that net info I posted, the weights.