Paul wrote
Rod Speed wrote
newshound wrote
Brian Gaff (Sofa) wrote

How can you tell, I've no idea what your picture shows, does it have a
blade missing and by the way why do turbines not use more blades?

Googling "why do wind turbines have three blades" will give you a number
of interesting articles.

But none that explain why the old dutch windmills had 4.
https://www.google.com/search?q=old+...mills&tbm=isch

Presumably they were slower so the drag wasnt as important.

How many horsepower does a dutch windmill generate ?

No idea. It wouldnt be trivial given that they usually drove
massive great grinding stones, but likely much lower than
the best of of the current massive wind turbines.

Less clear what they both do in the lower normal winds tho.

The wind turbines are currently 2MW to as much as 9MW. 2MW is over 2000
horsepower.

"How much horsepower did the average traditional Dutch windmill/wind pump
generate?"

https://www.quora.com/How-much-horse...-pump-generate

"Somewhere between 40 and 60 horsepower, but youll lose a lot between
the sails and the gears. So €˜downstairs where the pump or the
millstones
or the machinery was located, one would usually end up with around 16
~ 18 hp."

So a factor of 40 or so.

Interesting.