Pine Pienaar wrote:

Hi Paul

Maybe I'm wrong but with your current prop shank design will the balls not
be visible and thus exposed to the elements when you look from the blade
tips down towards the hub.

Yes they will be. We are not concerned with the prototype. I am giving that
some thought. Perhaps some type of sealing collar could be used. Plenty of grease
in there should keep the water out. The water will also leave as soon
as it is started up and maybe some of the grease :-).

Would it not be better to machine a grove into this prop shank for half the
diameter of the balls and thus sealing it to the outside world.

Or am I have a blond moment ??

Pine Pienaar
pine@cpro.co.za
Lancair 360 #664

Yes!!! Why did I not see that? Very good idea. I think it will work. 
I was blinded and focused on the stress flow but the stress
level is low enough in that area it is probably not a real factor.
Yes by all means. Do it that way on your end and let us know how it
works. BTW did the DXF files work for you? Do you have QB for the
blade coordinates?

Paul Lamar
 
The Aircraft Rotary Engine Newsletter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org