EH> -> That's the major drawback with the darius; it needs a lot of wind to
 EH> -> get it started.
 EH> I think we have a semantics problem here....
 EH> The Savonious rotor that I know about has near NO starting torque.  The
 EH> Darius rotor I know about has little "Top end" but lots of torque down
 EH> at low speeds.
 EH> Or am I terminally confused.....
I'm not going to say it. . . being the nice guy that I am, I won't.  Ah, 
heck, I will too.  You're terminally confused again, Elvis.  I didn't 
remember the correct names to apply to the two types of vertical turbines but 
do remember that one of them - the one that looked like bent helicopter main 
rotor blades - didn't have any starting torque but the other - which looked 
like a 55 gallon barrel cut in half vertically did.
There is a large vertical turbine a few miles south of me that is a Savonious 
rotor with a Darius rotor mounted at the top.  As was explained to me, the 
small Darius rotor (maybe 4-5 feet tall and 2-3 feet in diameter) started the 
main rotor turning and then was essentially along for the ride after that.  
Must have worked pretty well because it sat there and spun for 10-15 years 
until that tornado came through and wrecked it.
Regards.  Cloyce.
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