Prop question

[Dave[_16_]]

I've seen quite a few old airplanes on display and the props seem
hollow, not solid aluminum.
Are those just for display or is that the way some of them are built and
functional?

Thanks

Dave

[Steven P. McNicoll]

"Dave" > wrote in message
. net...
>
> I've seen quite a few old airplanes on display and the props seem hollow,
> not solid aluminum.
> Are those just for display or is that the way some of them are built and
> functional?
>

Steel props are hollow.