From: "Orion105" 
To: 
Reply-To: "Orion105" 


Are there any rules of thumb regarding the length to width ratio of spider
vanes.  I see them made quite thin (10:1 or higher) and quite thick (4:1 or
so).  I guess you need width to stop rotation of the diagonal, but how much
is optimum?

I have seen spider vanes that taper in width markedly from the outside of
the UTA to the hub.  I have even seen a design that goes the other way.  Is
there any advantage in tapering?  It seems to me that resistance to
twisting is proportional to the width of the vane and so a tapered vane
would be only as good as its narrowest point.  Is this right?

Ado

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