[C320-list] Burgee halyard

[Stephen Cox]

> 
> why not use small aluminum pop rivets instead of sheet metal 
> screws?  then you don't have the 2-metal issue at the 
> spreader, and the downward stress on the rivets is pretty 
> minimal.  nylon washers are a great idea.
> 

Better to use monel rivets for greater strength and reduced corrosion.
Still should put an anti corrosive coating on them though.

Stephen Cox
Tegwen #1141