Looks like an auxillary rudder for a yacht
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Till Ron posts maybe someone can tell us
AM
ahhh of course...a wind vane auto helm.
2 more pics one in the stowed position the other on full rudder position. If the clutch was engaged the rudder would be at the same angle (hopefully)[smilebigeye]
AM
Oh I see now. Shows how much yachting I do.[bighmmm]
I only figured its attached to a boat because you said "rudder". [emoji28]
I am now on my computer at work.
This machine has a name and a story behind it.
It was cutting edge for its time, but no one knew.
https://www.aulro.com/afvb/images/im...017/07/490.jpgUntitled by john smith, on Flickr
Ron