## Main Question or Discussion Point

Hello,
I have a question about the chord length of rotor blades from wind turbines.
I do not really understand what the difference is to the radius of a wind turbine. I can not find a real explanation, but it seems to be very important. I know that the formula of the chord length depends on many different things (forces, tip speed, number of blades e.t.c.).
I would really appreciate, if somebody could help me.
Have a nice weekend
ATY
Edit: I found a picture of the chord length in a rotor blade, but to me it looks like the radius...

Last edited:

Related Other Physics Topics News on Phys.org
SteamKing
Staff Emeritus
Homework Helper
Hello,
I have a question about the chord length of rotor blades from wind turbines.
I do not really understand what the difference is to the radius of a wind turbine. I can not find a real explanation, but it seems to be very important. I know that the formula of the chord length depends on many different things (forces, tip speed, number of blades e.t.c.).
I would really appreciate, if somebody could help me.
Have a nice weekend
ATY
Edit: I found a picture of the chord length in a rotor blade, but to me it looks like the radius...
It's not clear why you think the chord length of the blade is the radius. The picture you are showing is a cut thru one blade, showing the chord length (width) of the blade and its thickness, t. Remember, the blade is essentially a long slender wing which has the shape of an aerofoil in cross-section.

If you take a different view, one which shows the rotor in plan view, then the radius R of the rotor is properly the distance from the center of the hub to the outer tip of the blade.

So you mean, that the radius is the whole structure, while the chord length is just the blade thingy itself ? (Sorry, my english is bad, i marked the area of where I think the chord length starts with a red arrow)

SteamKing
Staff Emeritus
Homework Helper
So you mean, that the radius is the whole structure, while the chord length is just the blade thingy itself ? (Sorry, my english is bad, i marked the area of where I think the chord length starts with a red arrow)

Yes.

Ah Great, thank you for explaining this to me :)

SteamKing
Staff Emeritus