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Wind energy => Wind energy generators => Topic started by: titof on December 15, 2007, 04:43:33 PM

Title: hey guys ! a new type of windmill (french site)
Post by: titof on December 15, 2007, 04:43:33 PM
 ;D
enjoy the genious !

http://www.eolprocess.com

bye
titof
Title: hey guys ! a new type of windmill (french site)
Post by: Earl on December 15, 2007, 11:29:55 PM
I understand French perfectly and I was literally "blown away" by this ingenious idea.
A very genial idea.

Earl
Title: Re: hey guys ! a new type of windmill (french site)
Post by: Schpankme on December 16, 2007, 12:27:58 AM
;D
enjoy the genious !

http://www.eolprocess.com

bye
titof

AMAZING - French Design - Wind Mill Rotor
Title: Re: hey guys ! a new type of windmill (french site)
Post by: hansvonlieven on December 16, 2007, 03:33:53 AM
Can someone please tell me what is so good about this video, it does not show anything of the device and the inventor and the panel talk generalised shit.

A political stunt, no more.

Hans von Lieven
Title: Re: hey guys ! a new type of windmill (french site)
Post by: sergio007 on December 16, 2007, 04:13:51 AM
 :-\ Very interesting, but in his presentation, I think he didn't mention about the movement of the wind direction, only about dominant wind direction?... Then I think he will loose some power without moving itself  for moving wind direction.

And too, he did not mention how the gearing will be mount?   I mean one in each panel or one gear for each 4 panels and what kind of transmission he think to use  ... ?

It good to see it in theories, but  it's hard to do... (Harness all the wind effectively  ! )

Good luck to this inventor !



Alp
Sergio

Title: Re: hey guys ! a new type of windmill (french site)
Post by: sergio007 on December 16, 2007, 04:23:20 AM
Can someone please tell me what is so good about this video, it does not show anything of the device and the inventor and the panel talk generalised shit.

A political stunt, no more.

Hans von Lieven

Hey Hans go to the link presentation of the eoliene, skip like 3 chapters, then he explain the based concept is to do it like wind boat but with  horizontal rotational wing.
But I think it will be hard to do it without industrial making this kind of machine and there will be a lots of parts to proof his concept !

Alp
Sergio
Title: hey guys ! a new type of windmill (french site)
Post by: Earl on December 16, 2007, 02:10:24 PM
Hans,

the inventor explains everything including switching between 1:1 and 2:1 gearing depending upon power generation or minimum resistance to the wind should the wind force be too strong.  He also talks about multiple independent stories (Stockwerke) where each can have independent gear ratio switching.  One story could have big panels for low winds and another story could have smaller panels for strong winds.

Very well thought out and very ingenious.  I am very positively impressed with this idea.

Earl
Can someone please tell me what is so good about this video, it does not show anything of the device and the inventor and the panel talk generalised shit.

A political stunt, no more.

Hans von Lieven
Title: Re: hey guys ! a new type of windmill (french site)
Post by: titof on December 16, 2007, 03:03:10 PM
@ all
you can understand the "how to" windmill by seeing technical explanations on the site.
arts and plans talk by themselves. no need to speak french

if you had even drive a boat in the wind  (excuse bad language)... easy to understand . ;D
Title: hey guys ! a new type of windmill (french site)
Post by: Earl on December 16, 2007, 03:05:03 PM
Without French knowledge, you will miss a lot.

Basically his windmill is doing the same thing as a sail boat making a complete turn.

He switches gear ratios between 1:1 and 1:2 to change between full power and feathering (close to zero wind resistance).  His windmills therefore have a large dynamic range of wind speeds.  His arrangement also is such that one blade never blocks wind from another blade.

Hans' comment should be ignored since he did not understand.

Earl
Title: Re: hey guys ! a new type of windmill (french site)
Post by: titof on December 16, 2007, 03:07:01 PM
http://www.eolprocess.com/start.php

be patient and let the video play
 8)


"It is through science that we prove, but through intuition that we discover." - H. Poincare
OK EARL!
Title: Re: hey guys ! a new type of windmill (french site)
Post by: hansvonlieven on December 16, 2007, 09:34:18 PM
Thanks titof,

This is the link you should have posted before. Good technology. The other video is meaningless without this presentation.

Hans von Lieven
Title: Re: hey guys ! a new type of windmill (french site)
Post by: minesapint on December 17, 2007, 11:36:34 AM
I patented something similar a few years ago.
http://gb.espacenet.com/search97cgi/s97_cgi.exe?action=View&VdkVgwKey=GB2396190A&DocOffset=2&DocsFound=3&QueryZip=%28roger+AND+green%29+%3CIN%3E+pa&Collection=dips&SearchUrl=http%3A%2F%2Fgb%2Eespacenet%2Ecom%2Fsearch97cgi%2Fs97%5Fcgi%2Eexe%3Faction%3DFilterSearch%26QueryZip%3D%2528roger%2BAND%2Bgreen%2529%2B%253CIN%253E%2Bpa%26Filter%3Dgb%252Fen%252Fespacefilt%252Ehts%26ResultTemplate%3Dgb%252Fen%252Fresults%252Ehts%26Collection%3Ddips%26ResultStart%3D1%26ResultCount%3D10&ViewTemplate=gb/en/textdraw.hts&ViewErrorTemplate=gb/en/incerror.hts&DocsFound1=3&BeginHighlight=%3Cspan%3E&EndHighlight=%3C/span%3E&HLNavigate=
uk patent no GB2396190A
I didn't get the funds or grant to fully develop it.
I have an even  better design also on the drawing board - but again no 'interest' from the ones with the money to develop it.
As a lone inventor you can only go so far - time and money permitting.
Big industry seems only able to look at improving existing known designs.


Title: Re: hey guys ! a new type of windmill (french site)
Post by: Evil Roy Slade on December 17, 2007, 12:28:34 PM
As a lone inventor you can only go so far - time and money permitting.
Big industry seems only able to look at improving existing known designs.
@mine
I am interested in what you are doing. Briefly looked at your patent. Interesting possibilities however
the number of moving parts may make the device prone to 'things going wrong'

I would like to know more.

ERS
Title: Re: hey guys ! a new type of windmill (french site)
Post by: robbie47 on December 17, 2007, 02:05:20 PM
I believe that an important part of the sailing principles has been left out here.
Anyone who has experience with sailing understands the principles of sailing against the wind.
This principle is not included here.
One could make the blades shaped like bended sails or wings of an airplane, so more advantage can be derived from it.
In such case the blades drawn at the  6 and 12 o'clock positions of the overview drawing will have additional pull counter-clockwise (so, in the direction of the intended rotation) due to the mechanism of underpressure at one side of such bended blades. An example is attached

This will however require flexible blades, since a flipover of the bended side is required when such blades rotate from e.g. position 4 o'clock to 2 o'clock.
Title: Re: hey guys ! a new type of windmill (french site)
Post by: robbie47 on December 17, 2007, 02:08:07 PM
Sorry, double posting
Title: Re: hey guys ! a new type of windmill (french site)
Post by: NssB on December 17, 2007, 04:39:46 PM
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
Title: Re: hey guys ! a new type of windmill (french site)
Post by: titof on December 17, 2007, 05:36:34 PM
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.


Title: Re: hey guys ! a new type of windmill (french site)
Post by: robbie47 on December 17, 2007, 08:19:27 PM

- 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.
Title: Re: hey guys ! a new type of windmill (french site)
Post by: titof on December 17, 2007, 08:34:48 PM
I think you guess the mechanics ! ;D
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 !.. ;D
Title: Re: hey guys ! a new type of windmill (french site)
Post by: positron on December 17, 2007, 09:45:10 PM
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...

Title: Re: hey guys ! a new type of windmill (french site)
Post by: titof on December 17, 2007, 09:52:43 PM
Does the wind blow over your house ? ;D ;D ;D
here's one who is not going to pay for electrons ! ;D

Have courage  !
Post your photo when finished ! 8)
Title: Re: hey guys ! a new type of windmill (french site)
Post by: Evil Roy Slade on December 18, 2007, 12:08:55 AM
All good ideas here people.

As has been pointed out, in order to use the wind energy on the 'UP' leg the blade must be
correctly positioned and oriented, which requires the 'blade flip'.

We have experimented with this and found the mechanical losses in controlling the blade outweigh
the additional power generated resulting in a degradation of overall power output. But if you guys come up with something clever I would love to hear about it.

At the moment we are investigating the possibility of CHANGING the shape of the blade instead of flipping it. There are a few ways to do this, all are in the melting pot. I am mentioning this here to sew a few seeds in the fertile brains out there!

ERS
Title: Re: hey guys ! a new type of windmill (french site)
Post by: robbie47 on December 18, 2007, 09:44:22 AM
As has been pointed out, in order to use the wind energy on the 'UP' leg the blade must be
correctly positioned and oriented, which requires the 'blade flip'.

I assume you refer to my remark on the flipping of blade shape if shaped blades are used to gain the 'sailing' effect, so let me respond.

The simple solution I have in mind here is not using wood or steel but real sail material. This keeps the weight low and no additional control is needed.
Using sail kind of cloth has of course also some drawback. It's less robust on the long term, and it could make some additional noise ('flapping' of the sail for blades that are in the 'flipping over zone', so between say the 4 and 2 o'clock area)
Title: Re: hey guys ! a new type of windmill (french site)
Post by: minesapint on December 18, 2007, 10:34:25 AM
My latest design is a pure lift based design.
3 Symetrical foils each at 120 degrees.
A dc worm geared DC motor driven with PMW which averages at the overall sweep speed but speeds up or slows down in the cycle to provide a constant 20 degree angle of incident (optimum for my foil design) to the wind direction. This produces a thrust perpendicular to the wind.The thrust is one way for half the cycle and the other for the other half. I have some diags to explain this....
I have designed the electronics, sourced the motors, I have 3 one metre square blades made of strong polystrene  (in my garage). I need to get back out there and start welding it all together at some point but metal work is not really my strong point.
I was planning on putting it on a trailer so I could drive it to different windy locations, my house is quite sheltered. But this makes the metal work even more complex as it'll need to be easily assembled / disassembled.
The simulations I have done show that it will reach the efficiencies of a HAWT but will work at low speeds and high speeds (you simply reduce the attack angle and thus reduce the efficiency, stops the thing tearing itself apart).
Also with this design you can easily make a multipole motor on the base negating the need for a gearbox which keeps it quiet and efficient.
Interested if anyone wants to help out on this project, by trade I am an electronics / software engineer - need someone with good mechanical skills.



Title: Re: hey guys ! a new type of windmill (french site)
Post by: robbie47 on December 18, 2007, 11:27:31 AM
Sorry, wrong action again. One can not delete mistaken posts here.
Title: hey guys ! a new type of windmill (french site)
Post by: Earl on December 18, 2007, 12:00:43 PM
Hi,

All airfoils whether flat or curved have a characteristic called L/D or Lift / Drag.
The L/D ratio and how it varies with the attack angle is the most important thing.
Stalling performance is another.

A flat plate has very bad L/D and should never be used.  Sorry.  You can not
argue against 100 years of aerodynamic research.

The air foil must not be flat.

There have been lots of boats built with vertical wing sails; google Walker wingsail or drivesail, for example.  The Walker WingSail had a movable front part to change the shape of the airfoil from symmetrical, to unsymmetrical on either side.  This achieved a very high L/D over wide range of attack angles without stalling.  It was beautiful and worked well, but had higher weight.  There are other designs, you will find lots of interesting info on people's search for the ultimate sail.

As in all branches of engineering, there are always compromises necessary.  That's life.  Good engineering is to find the best compromises for a certain goal.

Earl
A plate blade works as well !
Hi titof,
Surely with flat blades its working as well, I don't argue that.
Title: hey guys ! a new type of windmill (french site)
Post by: Earl on December 18, 2007, 12:04:17 PM
My latest design is a pure lift based design.
Impossible to have a pure lift design.  There is always drag.
See my above post.

See also http://en.wikipedia.org/wiki/Airfoil
and
http://www.aerospaceweb.org/question/airfoils/q0035.shtml

Earl
Title: Re: hey guys ! a new type of windmill (french site)
Post by: minesapint on December 18, 2007, 12:22:54 PM
The foils are not flat.
A flat foil was in fact used by the wright bros with an angle of attack to produce life but flat foils are inefficient.
I use a symetrical foil with a angle of attack of about 20 degrees - if you go above this you stall, less than this reduces lift.
You are right every foil has a drag / lift coefficient. The best foils are non symetrical - interesting effects when the pilot tries to fly his plane upside down!!!!
You have to keep the drag low and the lift high for a chosen angle of attack.
A drag based machine will only go as fast as the wind whereas a lift based one can exceed wind speed that is why sailing boats can zip along.
Like I said I have done a number of sims - there are some quite good foil design apps on the net that you can use to get the design right.
The real clever bit in the software - how to control all the variables (such as blade rotation at any given point in the sweep and the angle of attack) for a given wind speed and rotor loading You have to stop the thing from stalling whilst keeping maximum torque.
.
Title: Re: hey guys ! a new type of windmill (french site)
Post by: Earl on December 18, 2007, 01:27:30 PM
I agree with everything you say, except about the Wright brothers.  They used airfoil wings on their plane, in fact they built a wind tunnel and studied their designs.  Maybe the first wind tunnel ever built?  These two bicycle builders were not dumb.

Earl
The foils are not flat.
A flat foil was in fact used by the wright bros with an angle of attack to produce life but flat foils are inefficient.
[snip]
Title: Re: hey guys ! a new type of windmill (french site)
Post by: minesapint on December 18, 2007, 01:41:51 PM
Wright brothers - I stand corrected.
I am sure I read it somewhere....
Title: Re: hey guys ! a new type of windmill (french site)
Post by: Evil Roy Slade on December 18, 2007, 02:03:08 PM
@mine

Interested in your new design and would like to see a diagram.

I assume at this point you don't have any performance data although you mentioned
doing simulations that may give me some guide.

How are you controlling the foil position to get the right attack angle?

ERS
Title: Re: hey guys ! a new type of windmill (french site)
Post by: minesapint on December 18, 2007, 02:55:57 PM
Foils are controller by worm geared dc motors. At the end of each boom.
Each shaft is encoded.
Wind direction is known using a weather vane or I did toy with the idea of using ultrasonics.
PWM drivers speed up or slow down the blades at certain points.
Blades switch tact at points A and B.
The whole thing rotates slowly, low noise (no tip speed noise as such), can be geared or use multipole genny.
Is also probably a lot less noisy (clutter wise) to radar, less curvey bits for multiple reflections.

Title: Re: hey guys ! a new type of windmill (french site)
Post by: Evil Roy Slade on December 19, 2007, 12:34:45 AM
@mine,

Thanks for the diagram. You said in an earlier post that your aim is to position the foil
at 20deg angle to create lift perpendicular to wind direction.

I believe the aim should be to create lift tangential to the circular path in order to impart
maximum torque.

The principle is the same but our switch points would be different.

Have I interpreted your diagram correctly?

ERS

EDIT: How did you do your simulations? Did you write some code or use something already available?
Title: Re: hey guys ! a new type of windmill (french site)
Post by: minesapint on December 19, 2007, 10:26:44 AM
lift tangental to circular path......
Possibly although to do this you need to increase the angle of attack to greater than the stalll angle.
All of this is controllable in software - once I have a working prototype I would tweak it for maximum output. The sims I ran assumed pependicular thrust. I was not able to take into account the wake of the preceeding blade - the maths got too complex - its all navir stokes type fluid dynamics stuff....
The main problems are accelerating the blades at point A nad B such that it changes tact. You need a very light blade and powerful motor.
I have asked companies to make parts of the turbine for me and getting a blade strong enough and light enough seems to be the sticking point - no one could really do it within budget.
I guess now as I have come clean with the design its 'open source', I would love to get this thing made as I said I have done the control parts, just need the mechanics.
 
Title: Re: hey guys ! a new type of windmill (french site)
Post by: Evil Roy Slade on December 19, 2007, 11:02:15 AM
Yes I see what you mean about the stall problem.
The tweaking would involve getting the best foil position to maximise the lift vector in the
tangent direction without going into stall state.

It's great that you have shared your idea.

I know you are developing a prototype. I would also like to have a go
at a small scale static prototype. By static I mean to fix the wind direction using a fan.
Its not ideal but ok to do some experimenting. I would then use one symetric foil in fixed position
attached to a sensitive strain gauge to measure its lift in the direction I want it.

From here one could then develop the foil settings matrix to be used by the controlling software.
I know you have probably already done it but this step will give me some evidence that the system
will work as expected.

If at this point I consider it a reasonable chance at success then a full scale proto will be built. Hopefully at this point you could jump in with your expertise.

Finally, although you said your idea is effectively now open source I still consider it yours. Hence I would like your permission to build the small scale prototype.

ERS

ERS



 

Title: Re: hey guys ! a new type of windmill (french site)
Post by: Paul-R on December 19, 2007, 04:30:56 PM
I patented something similar a few years ago....GB2396190A
Think big. If you can get the device up to 35,000 feet the wind is often at 250 mph
and always above 75mph (the jet stream). It could be tethered and be held up
by kiting. (Permissions will be needed. Civil Aviation will be told  where the lines are).

I wonder if you could get a small sum, maybe ?100,000 or so for a technology
demonstrator from Eon, Ecotricity or similar.
Paul.
Title: hey guys ! a new type of windmill (french site)
Post by: Earl on December 19, 2007, 11:08:01 PM
@Mine

just saw this link and have not had the time to read it, but it sounds rebel like.

What is your analysis of this idea?

http://peswiki.com/index.php/Directory:Neo-AeroDynamic

Earl
Title: Re: hey guys ! a new type of windmill (french site)
Post by: Evil Roy Slade on December 19, 2007, 11:31:10 PM
@paul

There are a number of companies trying to harness the jet stream. Check out http://www.skywindpower.com/ww/index.htm

@earl
Thanks for the link. Another great idea!

ERS
Title: Re: hey guys ! a new type of windmill (french site)
Post by: minesapint on December 20, 2007, 11:42:17 AM
ERS

Yep go for it. Tis better to be a small part of something big than to be a large part of nothing at all (current situation).
I have done these tests - I have 3 one metre blades with a 20mm radius semicircle and the front that tails off.
They work up to 25 degrees ish of attack.
If you hold them up in a light breeze you can feel the lift.
I played around with light woods initially and did all sort of measurements but settled onto polystyrene for the next big blade as you can get it cut to any shape quite cheaply.
Do the measurement - tell me how you get on, I will be able to provide the control electronics. You'll also need some hefty motors if you proceed further.
Title: Re: hey guys ! a new type of windmill (french site)
Post by: Evil Roy Slade on December 20, 2007, 12:34:44 PM
@mine

Thanks, I will certainly let you know how things go. Unfortunately (or fortunately),  it's christmas summer holidays here starting from next Monday so all my bodies will be away till Jan 14th.  Until then this project will remain in the theory and concept phase.  I am looking forward to working on this project with you.

Did you check out Earl's link a few posts back? Any comment?

ERS
Title: Re: hey guys ! a new type of windmill (french site)
Post by: minesapint on December 20, 2007, 12:50:35 PM
Saw the post from Earl, looks similar....
Interesting point though - this design would be well suitable for tide - water has 800 times more energy than air - ok so yes it is much slower flowing. This design however has all the electronics and controlling mechanics at one end of the blade so could be placed out of the water (at the top) making easy access and less corrosion / wear and tear.

ERS are you involved in this technology as a single inventor or do you run a company?
I have in the past got companies to design parts of it but they found it a bit too complex when I asked them to make the blades (light enough) whilst still strong.

Title: Re: hey guys ! a new type of windmill (french site)
Post by: Evil Roy Slade on December 20, 2007, 10:59:37 PM
@mine

I have three businesses involved in custom NC machines, software for manufacturers and project management. Like most people I am concerned with our footprint on this planet and would like to do my bit to help.

However no good idea or machine or whatever will get anywhere unless it is profitable. That might sound capitalistic but it's the harsh reality. So before allocating major resources I need to be reasonably comfortable that the project will at least be self sustaining.

Our current internal skills in the aerodynamics area are very limited. But that's ok, I love a challenge!
Initially I might have to ask you some dumb questions so please be gentle! If the project becomes a goer the required expert skills can be acquired.

ERS

Title: a new type of windmill. Mail from Prof Dr Evert
Post by: pese on December 28, 2007, 11:10:25 PM
Fred Evert

In English:

Best regards for holidays and best wishes for New Year.

2008 will be decisive for Alternative Physics. We all know many attempts
for solution of energy-problem made progress and we hope breakthrough
will come up next year. Just last months were rather exciting concerning
experiments with fluid-machines, as reported at News-at-Evert
www.evert.de/eft10e.htm

Two new and realistic proposals are presented: ?Windmill at Cellar?
www.evert.de/ap0701e.htm for autonomous power-supply of houses and
?Meander-Engine? www.evert.de/ap0702e.htm for drive of vehicles. I hope
you enjoy reading these pages - and good reasons recommend to check
these ideas intensively.

I wish you all the best.
Fred Evert
--------------

In Deutsch::

 www.evert.de/ap0702.htm

G.Pese
Title: Re: hey guys ! a new type of windmill (french site)
Post by: minesapint on January 29, 2008, 04:53:31 PM
Any progress on this?

I am still keen.....

Title: Re: hey guys ! a new type of windmill (french site)
Post by: eavogels on March 19, 2008, 08:29:18 PM
Hi.
I thought I had seen this before, and today I found where I had seen it.

This design is at least 150 years old.
It is in the book: 507 mechanical movements, from Henry T. Brown, first edition 1868.
It is design 486: plans of a vertical windmill.
Eric.
Title: Re: hey guys ! a new type of windmill (french site)
Post by: minesapint on March 20, 2008, 09:40:36 AM
Great minds think alike or fools rarely differ....