... In a way it is obvious, but on the other hand, it seems a bit loopy to me. The stresses on the blades are usually due to wind thrust and centrifugal...
Very well said Doug. I suggest that you keep a copy of that somewhere, could serve again, the topic is recurrent ... Jacques Souquet eoltec.com ... are ... you...
... Well, they aren't all that great...they require that a wind generator be UL listed (IIRC) so home builts are basically out.... -Guy- San Berdo taxpayer...
Dear Claus: The key words you said were: "History has lots of samples, for instance many historical Dutch mills used this concept." then you go on to say: "The...
The June issue of ESSN has hit the bit-stands, and is available for free download at http://www.rebelwolf.com/essn/ESSN-Jun2005.pdf With articles on...
This is a problem i have been looking at for some time, without any really good answers. Basically, all of the second hand machines are based around induction...
Modern electronics have been used to assist the mechanical pendulum swing by adding or detracting from the swing in various ways, usually magnetically ...
Though we hate to 'fess up to building it or writing the article now, you can check out our Wooden Windmill in issue #88 of Home Power magazine. The PDF of the...
Sounds like a cool story! They could use a driveshaft with a bunch of rotors (propellers) supported at the upper end by a kite, running a water propeller at ...
Do you meant, that wind turbine with induction generator excited with capacitors produces unstable voltage? But it is the same that small permanent magnet...
Toomas, Big turbines (utility scale) are normally not self excited and not self starting. For off-grid operations it is better to combine diesel and wind. Ed...
Toomas, If you Google the "Danish Wind Turbine Manufacturer's" website you can get a very detailed description of how it work. Ed ... [Non-text portions of...
I am in the market for a small VAWT for a grid tie demonstration with two axis hortizontal machines, can anyone recommend a decent vertical axis machine in 24...
Doug, I hate to correct you, but a sailboat uses it's sails directly downwind like a drag bucket. They sail upwind like a wing, not a drag bucket... When going...
I HAVE INSTALED TWO TIMES BLADE OF MY WINDMILL, WHOSE BLADE WE HAD MANUFACTURED IN OUR WORKSHOP, WE HAVE NOTICED THAT THEY CANT RESIST THE DUST STORM WHICH...
CAN I SHORT CIRCUIT 3 PHASE PM GENERATOR TO REDUCE THE SPEED OF BLADE, IN HIGH WIND VELOCITY, WITH OUT ANY HARM TO PM GENERATOR. CAN ANY MEMBER INFORM ME HIS...
... You do not need a press to make the metalwork on the wind turbines I design. welding is fine. But you would need strong magnets and winding wire. Also...
Well said Don, and let me add: ... Actually, a sailboat with modern high aspect rig is capable of highest speeds on a close reach, not a broad reach. This...
Toomas: The regulation of the voltage is possible through the use of dump loads - the problem is primarily with frequency, and the generator overspeeds. So it ...
I know, that's what I meant - just had the words backwards. Aren't you going to design a wind powered clock or what? Doug ... directly downwind like a drag...
Hi there, I could be totally off the wall here so bear with me. Would there be any practical advantage to spring loading your outer stator such that the air...
... Hi Shah, If the wind direction changes suddenly then your blades will suffer from very high gyroscopic forces. These forces will bend the blade backward...
Hmmmmm. Actually it's a different sort of thing with sails since there's no tip speed ratio to speak of, and the work you're accomplishing is really more akin...
Guys I grew up spending a lot of time on a sailboat, and I meant to say that a sailboat goes fastest across the wind (in a general sense), as an example for...
Here's a rotor driven catamaran http://foxxaero.homestead.com/files/t36w01.jpg This is mechanical, with a shaft through the mast to a propeller in the water,...
I stand corrected...Fast cats can skim across the surface on a plane and fly before the wind... I've got an Aquarius A-23 that has a displacement hull....I'm...
