Don't you love engineering samples..

[TomW]

This shows them pretty much as shipped except for the arbor I  bolted to the hub.

That hub tube is one foot long and the center is 3/4 inch diameter with a keyway in it. I bolted a 5/8th inch arbor to it using a piece of rubber hose to shim between the bolt part of the arbor and the center hole on the hub tube.

The blade stub mounting tube is 4.125 inches long and 1.060 inches diameter. The thickest part of the root airfoil is .450 inches and the root is 4.125 inches wide. The tip is 2 inches wide and .270 inches at its thickest. Total blade diameter is 7 feet 8 inches. The drop at the root is 1.25 inches which calculates out to 16 degrees of pitch with tips running flat.

Not sure what anyone else calls these but I have dubbed them The Fylon Blades

Too late today for much beyond the specs but I'll try to paint them tomorrow and stick them on a tape drive mill I have on my garage. We are in our lowest wind time of the year and in a low wind area anyway so I'm not expecting much until fall but will get them up anyway.

Oh, and after being painted and with an arbor installed the weigh in at slightly less than 4.5 #

Cheers.

TomW

[DaveR]

Hey Tom,

Where do you get your arbors from?

Thanks,

DaveR

[TomW]

DaveR;

Well I got 1 from the local hardware store. They could not order more so I got 5 more from harbor freight.

The 5/8th inch one is here:

http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=46623

The 1/2 inch one is here:

http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=46622

And $1.99 each from them and $5 from hardware store. But after handling and shipping I think they were about $4 each from harbor freight.

Cheeers.

TomW

[DaveR]

Thanks Tom. I have a Harbor Freight Store here locally...Great!

DaveR