VAWT backyard experiements

[brandnewb]

hahah this makes me realize that sometimes one does not need to understand something fully in order to use the effects of it

I mean I am still breathing yet know sooooo little on how it actually works.

[brandnewb]

it takes around 1.05 KG to stop the blades rotating while the wind speed is at around 1.5m/s

Do I have reason to celebrate or indeed go lift type ;(

I really am not looking forward to going lift at this stage in time.

[brandnewb]

no, lift only comes into play when the self destruct mechanism has been proven to be reliable and also that the whole structure can float on water.

Only then we will see how far lift can increase things.

[JW]

The device I was referring to is called a "governor." In elevator systems,

When it comes to Wristwatch, my grandfather was a repair outfit.

I was talking to him about the "regulator" he said NO its the escapement... 

[JW]

hmmm I must be overlooking something glaringly obvious yet for me not yet visible.

I will update this thread/edit. Im cooking some food to 

[brandnewb]

hahahahhahh



brandnubell

I love how you take effort to change my avatar name.


hahahha

it is a novel twist. One I have not ever seen before in all my years.

hahahha

[brandnewb]

hmmm I must be overlooking something glaringly obvious yet for me not yet visible.

I will update this thread/edit. Im cooking some food to 

Anyway JW, Let me just state that sharing food is a good way to bury hatchets.
So please accept my invitation that should you ever come over to the wrong side of the pond and be near by. Then please be my guest. I will make sure the dining table is full of abundance.

ohh my now I have to start practicing else risk yet other way of reputational damage if my food is not of quality

I really mean this all light heartily and with intend to just be cool and frivolous.

Perhaps if you would extend me the courtesy of editing my own logbook/dairy? It would feel less of an invasion of personal space that way. I am sure that you intended it that way this section yes?

[JW]

No, your fine.

I was hopping that you had made recipes and cook etc. Check out my link.

https://www.fieldlines.com/index.php/topic,144905.msg986159.html#msg986159

[brandnewb]

Ok I have given up on trying to correlate wind speed to an RPM and thus frequency of field reversals at low wind speeds (<3m/s).

Safe to say there is no consistency to be found and that is probably all because of turbulence and general wind direction that is changing a lot and within the footprint of the turbine I can imagine it being in a constant .. well turbulence. I am repeating my self .
The amount of work I have to put into analyzing a correlation is too off putting. It is not helping me to just get going.

So I am hoping for the wind to pick up again soon so I can take a few more looks at around 5m/s to see what kind of RPM the turbine rotates then.

But I would not be surprised that also then readings will be all over the place.

So I guess then I should be focusing on what is the max RPM allowed. and make sure that the PMA does something worthwhile well below that.

I also do not know a better idea at the moment

[brandnewb]

yeah no, this is proving rather impossible.
I am already at 8 seconds per revolution while the weather station registers 3.4m/s.
Now it is all about wind direction I think.

needless to say this will be difficult to really lay a finger on.

[brandnewb]

more than 7KG breaking force required to stop the blades spinning at around 3.4m/s

It would be great if the Adriaan would come back and either confirm or deny that these readings are something to write home about.

[brandnewb]

ohh wow!! I just realized why going floating might be the dumbest idea ever.

All this effort I put into keeping things safe and working towards having this bird float on water. The very water my family , neighbors and my self swim in each summer. With potentially lethal currents going mayhem.

Bad IDEA

[brandnewb]

Please witness the bird at glide mode on the new column. Stealth if you will even. But then only for the auditory sensors.

[brandnewb]

I am aware of a million things to improve upon.

And I can imagine there are like a ten fold of that on things I am not yet aware of I need to improve on.

It is just so peaceful and mesmerizing watching the phoenix spin. How ever slowly. Yet slow is what we want!! slowwww is better in this context.

[brandnewb]

BTW, that is not to say that I think I do not need advice.

I think we have already established that I can use advice more than anyone else!!

So if you see something on the turbine that warrants attention then please let me know.

I will always love you for it even if I already saw that particular issue.
It is my 70% 30% 100% rule.

Even though I might already know 70% of the advice given. it are the 30% we are looking for. And the thanks extended to any advice should always be a 100%.

[JW]

Reply

Here my obvious looking/.

For Me its ben posting videos

The system, login

[MattM]

The way your top and bottom allow leakage out of the blade is a must.  Its okay to have holes in your blades, preferably to only induce enough drag to get the result you want.  Human nature leads us to create cups, but if the air cannot leak then stagnant air gathers at the blade.  The leakage allows stagnated air to clear the blade.  The barrel-conversion savonius designs often prevent this leakage and it kills efficiency.  The air should flow around the blade rather than be stopped/blocked by it.  You want that clean air to be accessible to the blade.

[brandnewb]

The way your top and bottom allow leakage out of the blade is a must.  Its okay to have holes in your blades, preferably to only induce enough drag to get the result you want.  Human nature leads us to create cups, but if the air cannot leak then stagnant air gathers at the blade.  The leakage allows stagnated air to clear the blade.  The barrel-conversion savonius designs often prevent this leakage and it kills efficiency.  The air should flow around the blade rather than be stopped/blocked by it.  You want that clean air to be accessible to the blade.

Yes brother, please keep it coming!!.

Yet before I had a chance to even start on poking holes in the blades the Pheonix had other plans.

She started to generate a sound that resembles a middle C of a piano. Something around 256Hz. {1}or 440 Hz wha Ii actually believe to be more accurate{/1}

Needless to say now my focus is on what it is she is trying to tell me.

I already have a strong indication that it is this bearing I use to keep the bird upright.

Now if ever I have had a good reason to go scify then now is it.
I mean if store bought bearings start failing  then why not try something more futuristic?

[brandnewb]

so I have managed to keep my neighbours from revolting against me by overdosing both bearings with WD40.

Now although only the top bearing decided to want to become an opera singer I think this is just a waiting game.

See how long something lasts.

hmm ok well my current track record of components used is the embodiment of how NOT to do it if durability is in mind.

[MagnetJuice]

Trailer hubs are cheap and should be strong enough for that structure.

[MattM]

The most important neighbor in my case is the wife.

The nastiest noise I've ever had was when the top of a tube was being rubbed.  Kind of like the sound a glass makes when you wet your finger and do circles across the top.  Only about 1,000x louder.

[JW]

 

so I have managed to keep my neighbor's from revolting against me by overdosing both bearings with WD40.

https://shop.advanceautoparts.com/p/lucas-oil-products-heavy-duty-oil-stabilizer-1-qt-10001/7080005-P?c3ch=PLA&c3nid=7080005-P&adtype=pla&product_channel=online&store_code=&&&&&gad_source=1&gclid=EAIaIQobChMIr96ht-uuhAMVRTbUAR2pjgK5EAQYAiABEgK-kPD_BwE&gclsrc=aw.ds

https://shop.advanceautoparts.com/p/lucas-oil-products-heavy-duty-oil-stabilizer-1-qt-10001/7080005-P?c3ch=PLA&c3nid=7080005-P&adtype=pla&product_channel=online&store_code=&&&&&gad_source=1&gclid=EAIaIQobChMIr96ht-uuhAMVRTbUAR2pjgK5EAQYAiABEgK-kPD_BwE&gclsrc=aw.ds

Dont worry about links here. I am on it

[Mary B]

The most important neighbor in my case is the wife.

The nastiest noise I've ever had was when the top of a tube was being rubbed.  Kind of like the sound a glass makes when you wet your finger and do circles across the top.  Only about 1,000x louder.

You should here the tower next to the house when the grease runs dry in the tube the mast turns in... steel on aluminum... that tower is attached to the house so the noises go right into the house structure!

[MattM]

This guy went with an exterior scoop, and its a pretty similar radius IMO.

https://www.youtube.com/watch?v=h-FqF21wyLc

Notice his pulley size.

[Mary B]

This guy went with an exterior scoop, and its a pretty similar radius IMO.

https://www.youtube.com/watch?v=h-FqF21wyLc

Notice his pulley size.

That is a lift/drag type wing, a different design philosophy...

[MattM]

This guy went with an exterior scoop, and its a pretty similar radius IMO.

https://www.youtube.com/watch?v=h-FqF21wyLc

Notice his pulley size.

That is a lift/drag type wing, a different design philosophy...

Its a modified Lenz, so its a different scoop design.  The point of the link is to show how massive the pulley ratio he went with.  I personally would have gone two smaller stages using chains, but that is just my preference.  It was going to be loud regardless of the choice.

[brandnewb]

brace for impact!!!

are going to be my infamous last words if storm Louis, that will be here tonight, has anything to say about that.

Now I am going to do something stupid. I am leaving the Phoenix errect. I did fortify the guywires though.

I just need to see what will happen so I can learn what to focus on next iteration.

[brandnewb]

ohh wow,

Now I am getting nervous!

I tried keeping the Phoenix on a diet. So far that has been working out rather nice.

But what If the guy wires decide to go on a strike?

Then the whole bird will actually fly!!


hmmm.

hmm.

I will reconsider going full steel or maybe even lead who cares about the health impact of lead anyways

[brandnewb]

nooooooo. even before the storm hit, yeah sure things are picking up already here, I already have to take her down.

It is the part that prevents the upper bearing from slipping down that is in serious need of redesign.

nooo. Now I have missed this window op opportunity to see thing horribly go wrong

[brandnewb]

I am actually thankful JW. Now I have again in my playlist this song!!

And in some ways I think what you tried to tell me is that I am needed.

Thank you JW!

Reply

Here my obvious looking/.

For Me its ben posting videos

The system, login

[brandnewb]

I am at the service of the greater good.

[brandnewb]

And please all you have got to see this!

It is about how difficult it is to back down to a statement one made early on.

Especially if it has gotten a lot of traction.

https://www.youtube.com/watch?v=6R9cIDjXH2k
(JW, you and I both know this is just and ID QS yes?)

Now I for one am just so blunt that it is rather easy for me to admit when I made a mistake.


Yet what if I had to back track after acclaim?

[brandnewb]

@MattM,

So these original cups are holding on longer than I expected. I had expected them to be pulp by now.

So now is a good time to start punching holes in them.

Can you suggest some kind of pattern? Or how much surface area should stay intact. those kind of things.

And as always. Even if we do not get it optimal or even right the first try. It is the thought that counts!