hey guys ! a new type of windmill (french site)

[NssB]

The idea seems pretty "genial", however something is playing in my mind. Is it just me, or is this system going to be terribly unbalanced?

What I mean is, you have wind coming in from lets say NORTH blowing SOUTH. Now lets just picture for one minute that the LEFT side of the rotor is on the WEST and the right on the EAST. So, we have NORTH winds blowing SOUTH pushing on the WEST blades for an ANTI-CLOCKWISE rotation, as depicted in the flash videos. These WESTerly blades are being pushed on from 0 degrees through to perpendicular(so many degrees above WEST). And on the EASTerly plane, you have a feathered situation in order to reduce drag.

Now please correct me if I am wrong, but wont the pressure exerted on one side unbalance the system causing great stress on the mount?


NssB

[titof]

Well
I think  the entiere device is wind-facing by a little blade in front or behind it like a weathercock...
you see only a model on video
I 've meet this guy and talked with him about it ...
don't forget each blade make a half turn in time the rotor makes one turn.
you must have blade's shape which have  the same wing profile "or section".
- I told him : did you try wing-plane profile ?...-
A plate blade works as well !
It 's surely perfectible ... but it's working when all windmills are not !
very efficient.
we can build it .... and big torque !
It's in a corner of my head now.

[robbie47]

- I told him : did you try wing-plane profile ?...-
A plate blade works as well !
It 's surely perfectible ... but it's working when all windmills are not !
very efficient.

Hi titof,
How did you get in touch with this French guy? By e-mail? I'd like to have a chat with him.
Surely with flat blades its working as well, I don't argue that.
But, since he compared the claimed principle with a sailing boat in his presentation, I thought his detail over and was actually supprised that he did not claimed this additional principle as well, since it is very obvious (to me).

My French is not so good, so I wonder whether he claimed the basic idea himself. It shows very much resemblance with the patent of Roger Green, alias minsapint earlier.

Anyway, I think its a funny idea, I'd like to have it a go myself and try this out.
The blade angle can be very simple adjusted by a simple timing belt and two different size pulleys (2:1 diameter) between the main axis and the centre axis of each blade
Balancing could be an issue, like NssB mentioned.

[titof]

I think you guess the mechanics !
simple!

I saw him on a" innovia" meeting 2 month ago
I talk with him 20 minutes .
you can contact him thew email address on his website

I don't know more
I hope for you he speaks english !
He 's actually shearching for investissors to developpe the project 

hard to find...

regards !..

[positron]

Hello all!

A bit mixed feelings about finding "my" idea out and about. Oh well, I bet there are many of us. Anyway, I am already in the process (rather slowly thow) of building a windmill looking and working just like this one. The wings are 2000mm high and 600mm wide. They are made of wood, with 10mm steel shafts attached to the middle of the short ends. For the mechanics i have standard chainwheels and chain for mopeds. I have 4 pcs 38T (teeth), one on each wing shaft, connected togheter with one chain, all around them for synchronization of the wings and establishing their relative positions. They need to bee 0, 45, 90, and 135 degrees to each other, or 1/8 of a rev., like this:

  /
I O -
  \

For the rpm reduktion and reference to wind direction I have one stationary chainwheel (16T) in the center connected with a drive chain to one 32T chainwheel on one of the wing shafts. The 16T is to be welded on a 20mm diam. vertical rod wich is fixed to the ground. The 16T needs to be a bit above ground, because there will be another, bigger wheel below it, wich is not fixed to that rod though.
Picture a tube, fitted with roller bearings, on the rod, resting at the fixed 16T. The tube is carrying the whole Wheel.
The arrangement with the chain wheels and chain doesn't transfer any power, if everything is symmetrical
and balanced. The main forces are from the wing shafts pushing on the "cross" type frame.
Output to a generator is to be with a 350 mm diam. wheel, same profile as a standard car alternator. I hope to get more peak power than from an average car generator, though. If anybody is intrested i'll make a drawing of how to make  the chains and belt for the generator to coexist without collision. It's not that difficult,though:
The 38T sync-wheels are mounted on the wing shafts immidiately below the "lower cross" frame. Below
one of the 38T is the 32T mounted, wich is at level with the fixed 16T. The big "belt wheel" has a large enough center hole, it's bigger than the 16T wheel. The belt wheel is fastened to the "lower cross" by means of four
rods fastened vertically to the belt wheel almost at the periferial. Remember, as the Wheel rotates, so does
the 16T-32T chain, so there is no conflict with the belt wheel.
The 38T are for Suzuki, don't know model
The 16T is for Honda MT50/MB50
The 32T is for Suzuki K50
They are all 1/2" x 1/4", japanese standard. Note that there needs to be the absolute relation 1-2 for the rpm
reduction. The other four could be any number of teeth, as long as they are identical.

Finally, to make it possible to adjust for wind direction, the rod with the 16T should be rotatable and have a long handle extending the diameter of the wheel. It's for adjusting for wind direction. I saved that one not to complicate things.

For the big wheels to fit on a 10 mm shaft, i have welded BIG washers meant for use with threaded rods in
building constructions onto them.

I hope to be up and running within a few weeks.
Oh, and the upper cross is simply connected to the lower cross, using the long tube or any other arrangement.
Problems  I expect: I don't realy like the wings I have. I would have preferred a plastic thing with an aluminum
tube as a shaft. I have weak points where the 10mm shafts are mounted to the wooden boards. And plastics
would be better with moisture. Also it's gonna need some stabilizing. I have no solution for "storm-proofing"
other then building it sturdy enough. 

As time goes by...