Blade carving

[trumpets3u]

on the view in the blade carving> Looking at the end views ( in shows 3) is the trailing edge on the left or the right side. I got my blades marked out and want to make shower that I'm correct.

                    Thanks Brian

[TomW]

Brian;

The trailing edge is the thinner edge, usually a knife edge as opposed to the rounded, blunt edge of the leading edge.

The easy way to remember is to think of an airplane wing. The thick edge is to the front and the back has thin flaps which is obvious when you look at one.

Just one way to understand without having to understand how it works.

Tom

[paulpic]

You must have had some sort of picture but it doesnt show.The trailing edge is the

one that is at the bottom side of the rotation.Its usually the first edge you cut when carving the blade.The leading edge is the one you dont touch and is square to centre and tip.

[lglagasse]

Hi trumpets3U:

I think the question that you are asking refers  to weather you are making clockwise or counterclockwise rotation blades. For CCW, as the blades are laying round side up, the trailing edge would be on the right. Fat side to your left, skinny side to right. For clockwise rotation it would be reversed. That would be as you are looking at the "end" view. Flat side faces the wind.

Good Luck

lglagasse

[trumpets3u]

Does it matter which way the turbine turn? As you look at the end view of the R30,R60, R12 on the web sight what do you call the flat side? The top or the bottom?

                           Thanks Brian

[lglagasse]

Hi trumpets3u:

Which web site? Nunbers-r30, r60 don't know.

Upper Right corner on this site, go to FAQs section, homebrew, Blades 101, good pics and info there. The blades are CCW rotation.

You ask which is up. As you are making the blades the round side is up, flat side down. Just as Tom W said about the airplane wing.

CCW or CW rotation. Are you following a plan from this site??

Good Luck

lglagasse

[kraft1191]

Brian,

I used Hugh Piggotts "How to build a Wind Turbine" illustrations and after a little imagination the shape became clear.  I'm no wood carver and was afraid I would ruin my $65 worth of BASS wood.  Anyway a trip to Windchasers in Ontario proved I was on the right track.  Hugh's book works!

Bill

[Ungrounded Lightning Rod]

To make that clearer:

The broad humped surface of the blade is downwind, the flat or nearly-flat surface is upwind.  (This is the reverse of a propeller, while all the rest of this is just like a propeller.)

The leading edge (forward as it spins) is rounded, the trailing edge is sharp.

The blade is angled so the leading edge is more upwind than the trailing edge.

The blade is usually twisted so it is NEARLY flat to the wind out at the end and points much more into the wind near the hub.

[trumpets3u]

That would be on the other power web page under  wind than go to the 10' turbine and than go to Wind turbine blades.

[trumpets3u]

I did a practice blade today, I got it done and found out that the rotation would be counter clock wise, but I saw where I can speed it up and change the way I did it.

I will be using eastern white ceder. ? would white pine also work?

                      Thanks Brian

[imsmooth]

I'm using Radiata Pine.  30,000psi strength.  I will coat with Epoxy paint.