windgen.org vawt discussion

windgen · windgen

This topic is reseved for links to products that have evolved, in part, as a result of this forum. As of 5/2013: http://www.lynxwind.com/ This forum was inspired in part by Ed Lenz. See: http://www.windgenkits.com/vcom/index.php This posting is neither a claim of any kind, or an endorsement...

windgen · windgen

from: http://www.thebackshed.com/Windmill/articles/WindPower.asp: "There is a limit to the amount of power we can extract from the wind. Imagine a circular column of moving air, or wind, 2 meters across. We can calculate how much power is in that moving column of wind with the following W...

sjh7132 · sjh7132

I'm creating this thread to hold the spinoff simulation results. I'm going to keep it protected so that this thread will only have results. All comments should be posted to Spinoff Discussion. For each turbine tested, I'm going to post as complete and consistent information package as I can. My...

windgen · windgen

This forum, and its' parent (www.windgen.org,) were started to encourage the development of wind turbines that can produce usable power in low winds. There are milestones in development in the form of sellable turbines and ancillary products (possibly spawned in part by this discussion.) Th...

windgen · windgen

For useful calculators based on real-world experience, see: http://www.usvawt.com/engineering.html. Ed Lenz has worked tirelessly contributing to the education of people interested in wind generators. For real hands-on practical demonstrations, see: http://www.windgenkits.com/Tu...

Caleb · Caleb

I like how they inflated the blades, but whether or not it is an efficient airfoil is another matter. It doesn't appear to have a generator. http://vimeo.com/4998719 http://www.mas.caad.arch.ethz.ch/Exhibition/Exhibition http://www.blech.arch.ethz.ch/Main/MAS09 -- Edited by Caleb o...

crazyguy · crazyguy

I started a new thread because the foam tyvek thread/post was evolving. So the latest on the wood veneer over the rib formers to make a hollow wing experiment. The bamboo veneer is much stronger and bends to form the LE much nicer. I chose to try the maple veneer because it was cheaper. First try on bendin...

dropthetailgate · dropthetailgate

My test run was less than satisfactory today but I won't give up. 75 watts max in probably about 12 -15 mph winds. She is built to run loose and the belt just has to be too tight I think to not slip. Gonna try to reduce the gear ratio some more and maybe change from a 16 AWG stator to an 18 AWG stator I guess and...

Caleb · Caleb

I moved this build to a thread with a slightly more descriptive title. The 035 refers to the turbine area: 0.35 m^2. I just got a 3-D printed part from Ponoko; pretty exciting. The plan is to make copies using a silicone mold and polyurethane casting resin. One potential problem; I did not factor in s...

keithturtle · keithturtle

"I wish we had another personal area here that we could share stuff non related to mills on. I'm sure we could tell some interesting stuff. I did a show and tell one time for 4th graders that was precious!" Jim Wish granted Turtle

GoVertical · GoVertical

I completed fabricating a new VAWT. I still need to attach the PMA. I will first try direct drive and if that proofs not to provide enough RPMs it can easily be configure with a pulley and belt drive. The proto-type shows the hub needs a lot of improvement and I still need to add alignment braces to the top a...

Andymac252 · Andymac252

Hi everyone, this is my first time post to the forum. Can anyone tell me if there is a formula to calculate the number of turns required for a copper coil? I've just bought a roll of 19 AWG enameled copper wire - does the number of coil turns depend on the size of the magnets used? I was thinking of buying 12 ne...

Lynx · Lynx

Some fun footage from today. A huge State sized storm with many super cells passed through last night. 50-80 mph winds on the squall line. The VAWT did fine, but power out / trees down. Note how with this design there is no inward lift force. The lower wings have only outward force support. The radi...

crazyguy · crazyguy

Has anyone ever tried testing all the designs in a lab type situation for torque, which design savonius, darrius, H, eggbeater, sharp, etc has the most torque? Similar to the drawing?

Amin · Amin

Is there any Software for designing VAWT with "single streamtube", "multiple streamtube" and "double multiple streamtube" methods ???

goldhunter_2 · goldhunter_2

I built a 6' tall by about 5' wide vawt out of scrap aluminum for a experiment (it's turned out as a failure so far) it is mounted on a garden fence pole about 3' off the ground we have had a good steady breeze yesterday and today I estimate 9-10mph and my vawt will not turn by wind yet I can spin it easy by ha...

Lynx · Lynx

I have concluded my initial testing of various circuits that convert 6-12 volt DC to 120 volt lighting. I tested two types of E-Core transformer and two sizes of AirCore Inductors. The results are startling! If you have a wind turbine or solar panel that puts out 5 watts the Super Joule Ringer 2.0 wit...

Caleb · Caleb

I found this on YouTube. It might be of interest. It appears that only the first lecture series is from the U of Minn. However, the format of the other videos is similar, so maybe they are as well. The person who put the playlists together did not enable embedding them, so to see the whole series you ha...

Caleb · Caleb

This video got me thinking. The water pumping windmill found on many old farms was successful because it used low but consistent winds. I wonder if it would be more wise to build a large, high torque VAWT like a Lenz2 that would provide good energy in say 4 to 6 m/s winds and "furl" it when the...

electrondady1 · electrondady1

it may look like the cybermen have gotten a foot hold in my shop but it's just my new exhaust system for welding . it moves a lot of air , i think i will need a replacement air source or it will pull smoke from my wood stove.

bradyaero · bradyaero

Well, after a year of doing not much I finally got my d-hawt turned into a dvawt. I tried originally to use the roof of my garage to direct the wind towards the turbine like a sail, but I discoved that I was losing to much power when the wind was at angle to my turbine. So I built a small tower and set the turbi...

Amin · Amin

I need open source codes of "single streamtube", "multiple streamtube" and "double multiple streamtube" for designing VAWT

goldhunter_2 · goldhunter_2

Ok still no luck finding a fisher motor to use but I am progressing s...l....o...w....l...y with my experimental Vawt to see if it will even work here. So far I have made /adapted the hub, a 13" fly wheel and made a 6' tall center shaft with aluminum disc to attach the eggbeater style blades , going...

Caleb · Caleb

Here is a small VAWT for sale (18" dia x 18" tall) and they say it puts out 45 Watts. Either I'm doing something terribly wrong or they are overstating its output. http://www.amazon.com/ALEKO-WGV45W-Residential-Vertical-Generator/dp/B008CV6UF8/ref=sr_1_12?s=lawn-garden&a...

crazyguy · crazyguy

"Necessity is the mother of invention" Not that this is my invention but I have the need, so to speak. I want it to pump water 24x7 out of my basement sump. The head would be around 15 feet. Does anyone see any problems with this design? Any tips? I'm diverting my efforts from my SEAGULL to this...

windgen · windgen

Lynx is exactly where I wish every guru was with regards to why I started this forum. He has developed a usable and marketable product. I can understand a bit of discomfort with commercialization from a purist's point-of-view, but it is not my intention to make this a philisophical discussion. We los...

dart · dart

I am a retired mechanical engineer and I live in a farm in Portugal. I would like to do some experiments with a VAWT, by using a replica of the blades of the Pacwinds Delta 2. However I could not find anywhere on the internet the drawing and data of these blades (only found movies and fotos). I would like to k...

crazyguy · crazyguy

Since when you live without city water pressure and have a high water table, a basement sump pump is a neccesity. If power goes out you are stuck with a battery powered pump, and they really can't do the job. I've come up with this vawt powered version that pumps as long as the wind blows. VAWT is over 60 fee...

Lynx · Lynx

For your entertainment, here is a video of a simple Micro VAWT made from a PC fan motor, wood base and dowel, foam board and poster paper. The electronics come from a broken solar light. The dimensions of the turbine are 10" D x 12" H. The blades are made from paper but could be made from thin s...

crazyguy · crazyguy

I was thinking about the question marks in the first drawing....nothing happens here. Do you think anything could be gained by the placement of disk magnets in the second drawing? Do you think it's worth the effort? -- Edited by crazyguy on Sunday 5th of May 2013 10:22:11 AM

Topic		Started By	Replies	Views	Last Post
	STICKY: Usable Technologies (closed) (Preview) This topic is reseved for links to products that have evolved, in part, as a result of this forum. As of 5/2013: http://www.lynxwind.com/ This forum was inspired in part by Ed Lenz. See: http://www.windgenkits.com/vcom/index.php This posting is neither a claim of any kind, or an endorsement...	windgen	0	310	May 7th by windgen
	STICKY: How Much Power Can You Extract from the Wind? (closed) (Preview) from: http://www.thebackshed.com/Windmill/articles/WindPower.asp: "There is a limit to the amount of power we can extract from the wind. Imagine a circular column of moving air, or wind, 2 meters across. We can calculate how much power is in that moving column of wind with the following W...	windgen	0	6374	May 19, 2011 by windgen
	STICKY: Spinoff Results ( 1 2 3 4 ) (closed) (Preview) I'm creating this thread to hold the spinoff simulation results. I'm going to keep it protected so that this thread will only have results. All comments should be posted to Spinoff Discussion. For each turbine tested, I'm going to post as complete and consistent information package as I can. My...	sjh7132	33	57660	Apr 11, 2011 by sjh7132
	STICKY: Forum Guidelines (closed) (Preview) This forum, and its' parent (www.windgen.org,) were started to encourage the development of wind turbines that can produce usable power in low winds. There are milestones in development in the form of sellable turbines and ancillary products (possibly spawned in part by this discussion.) Th...	windgen	0	9063	Jan 3, 2011 by windgen
	STICKY: Engineering Calculators and Tutorials (closed) (Preview) For useful calculators based on real-world experience, see: http://www.usvawt.com/engineering.html. Ed Lenz has worked tirelessly contributing to the education of people interested in wind generators. For real hands-on practical demonstrations, see: http://www.windgenkits.com/Tu...	windgen	0	11356	Nov 19, 2010 by windgen
	Interesting VAWT construction ( 1 2 3 4 5 ) (Preview) I like how they inflated the blades, but whether or not it is an efficient airfoil is another matter. It doesn't appear to have a generator. http://vimeo.com/4998719 http://www.mas.caad.arch.ethz.ch/Exhibition/Exhibition http://www.blech.arch.ethz.ch/Main/MAS09 -- Edited by Caleb o...	Caleb	46	2590	2h, 22m ago by wangpanpan
	Wood Veneer Blade skins [aka foam/tyvek ] ( 1 2 3 4 5 … 9 ) (Preview) I started a new thread because the foam tyvek thread/post was evolving. So the latest on the wood veneer over the rib formers to make a hollow wing experiment. The bamboo veneer is much stronger and bends to form the LE much nicer. I chose to try the maple veneer because it was cheaper. First try on bendin...	crazyguy	86	1754	2h, 23m ago by wangpanpan
	Posted for go vertical17 ( 1 2 3 4 5 … 10 ) (Preview) My test run was less than satisfactory today but I won't give up. 75 watts max in probably about 12 -15 mph winds. She is built to run loose and the belt just has to be too tight I think to not slip. Gonna try to reduce the gear ratio some more and maybe change from a 16 AWG stator to an 18 AWG stator I guess and...	dropthetailgate	94	5895	2h, 24m ago by wangpanpan
	VAWT 035 ( 1 2 3 4 5 … 21 ) (Preview) I moved this build to a thread with a slightly more descriptive title. The 035 refers to the turbine area: 0.35 m^2. I just got a 3-D printed part from Ponoko; pretty exciting. The plan is to make copies using a silicone mold and polyurethane casting resin. One potential problem; I did not factor in s...	Caleb	209	8862	2h, 26m ago by wangpanpan
	Off Topic thread- post whatever non-VAWT stuff here ( First … Last » ) (Preview) "I wish we had another personal area here that we could share stuff non related to mills on. I'm sure we could tell some interesting stuff. I did a show and tell one time for 4th graders that was precious!" Jim Wish granted Turtle	keithturtle	804	129736	12h, 26m ago by GoVertical
	Started New VAWT proto-type ( First … Last » ) VAWT (Preview) I completed fabricating a new VAWT. I still need to attach the PMA. I will first try direct drive and if that proofs not to provide enough RPMs it can easily be configure with a pulley and belt drive. The proto-type shows the hub needs a lot of improvement and I still need to add alignment braces to the top a...	GoVertical	1236	404951	yesterday by crazyguy
	Number of coil turns - what is the formulae?? ( 1 2 ) (Preview) Hi everyone, this is my first time post to the forum. Can anyone tell me if there is a formula to calculate the number of turns required for a copper coil? I've just bought a roll of 19 AWG enameled copper wire - does the number of coil turns depend on the size of the magnets used? I was thinking of buying 12 ne...	Andymac252	10	190	4 days ago by edemy2001
	Radial Alt ( 1 2 3 ) (Preview) Some fun footage from today. A huge State sized storm with many super cells passed through last night. 50-80 mph winds on the squall line. The VAWT did fine, but power out / trees down. Note how with this design there is no inward lift force. The lower wings have only outward force support. The radi...	Lynx	29	1582	4 days ago by crazyguy
	VAWT testing. Torque comparisons of different designs. (Preview) Has anyone ever tried testing all the designs in a lab type situation for torque, which design savonius, darrius, H, eggbeater, sharp, etc has the most torque? Similar to the drawing?	crazyguy	9	277	4 days ago by crazyguy
	Software for designing VAWT with "single streamtube", "multiple streamtube" and "double multiple streamtube" methods (Preview) Is there any Software for designing VAWT with "single streamtube", "multiple streamtube" and "double multiple streamtube" methods ???	Amin	2	81	5 days ago by Apis21
	VAWT experiment failure where did I go wrong? ( 1 2 3 ) (Preview) I built a 6' tall by about 5' wide vawt out of scrap aluminum for a experiment (it's turned out as a failure so far) it is mounted on a garden fence pole about 3' off the ground we have had a good steady breeze yesterday and today I estimate 9-10mph and my vawt will not turn by wind yet I can spin it easy by ha...	goldhunter_2	20	286	5 days ago by GoVertical
	Efficient Wind or Solar Powered Lighting ( 1 2 ) (Preview) I have concluded my initial testing of various circuits that convert 6-12 volt DC to 120 volt lighting. I tested two types of E-Core transformer and two sizes of AirCore Inductors. The results are startling! If you have a wind turbine or solar panel that puts out 5 watts the Super Joule Ringer 2.0 wit...	Lynx	14	1380	5 days ago by crazyguy
	U of Minn lecture series (Preview) I found this on YouTube. It might be of interest. It appears that only the first lecture series is from the U of Minn. However, the format of the other videos is similar, so maybe they are as well. The person who put the playlists together did not enable embedding them, so to see the whole series you ha...	Caleb	0	82	6 days ago by Caleb
	Going after low vs. high wind (Preview) This video got me thinking. The water pumping windmill found on many old farms was successful because it used low but consistent winds. I wonder if it would be more wise to build a large, high torque VAWT like a Lenz2 that would provide good energy in say 4 to 6 m/s winds and "furl" it when the...	Caleb	6	143	6 days ago by Caleb
	my new welding smoke exaust system (Preview) it may look like the cybermen have gotten a foot hold in my shop but it's just my new exhaust system for welding . it moves a lot of air , i think i will need a replacement air source or it will pull smoke from my wood stove.	electrondady1	1	52	6 days ago by crazyguy
	DHAWT gone vertical! ( 1 2 3 ) (Preview) Well, after a year of doing not much I finally got my d-hawt turned into a dvawt. I tried originally to use the roof of my garage to direct the wind towards the turbine like a sail, but I discoved that I was losing to much power when the wind was at angle to my turbine. So I built a small tower and set the turbi...	bradyaero	24	525	6 days ago by electrondady1
	Open source codes of "single streamtube", "multiple streamtube" and "double multiple streamtube" (Preview) I need open source codes of "single streamtube", "multiple streamtube" and "double multiple streamtube" for designing VAWT	Amin	1	77	6 days ago by Caleb
	eggbeatter VAWT blade angles? (Preview) Ok still no luck finding a fisher motor to use but I am progressing s...l....o...w....l...y with my experimental Vawt to see if it will even work here. So far I have made /adapted the hub, a 13" fly wheel and made a 6' tall center shaft with aluminum disc to attach the eggbeater style blades , going...	goldhunter_2	5	113	7 days ago by crazyguy
	Small commercial VAWTs ( 1 2 ) (Preview) Here is a small VAWT for sale (18" dia x 18" tall) and they say it puts out 45 Watts. Either I'm doing something terribly wrong or they are overstating its output. http://www.amazon.com/ALEKO-WGV45W-Residential-Vertical-Generator/dp/B008CV6UF8/ref=sr_1_12?s=lawn-garden&a...	Caleb	10	264	9 days ago by crazyguy
	New project- VAWT powered sump water pump ( 1 2 3 ) (Preview) "Necessity is the mother of invention" Not that this is my invention but I have the need, so to speak. I want it to pump water 24x7 out of my basement sump. The head would be around 15 feet. Does anyone see any problems with this design? Any tips? I'm diverting my efforts from my SEAGULL to this...	crazyguy	22	403	12 days ago by Caleb
	Commercialization (Preview) Lynx is exactly where I wish every guru was with regards to why I started this forum. He has developed a usable and marketable product. I can understand a bit of discomfort with commercialization from a purist's point-of-view, but it is not my intention to make this a philisophical discussion. We los...	windgen	5	158	May 7th by Lynx
	PacWinds Delta 2 blade drawings (Preview) I am a retired mechanical engineer and I live in a farm in Portugal. I would like to do some experiments with a VAWT, by using a replica of the blades of the Pacwinds Delta 2. However I could not find anywhere on the internet the drawing and data of these blades (only found movies and fotos). I would like to k...	dart	3	246	May 7th by crazyguy
	VAWT Wind Powered Sump Pump (Preview) Since when you live without city water pressure and have a high water table, a basement sump pump is a neccesity. If power goes out you are stuck with a battery powered pump, and they really can't do the job. I've come up with this vawt powered version that pumps as long as the wind blows. VAWT is over 60 fee...	crazyguy	0	125	May 5th by crazyguy
	LYNX Micro VAWT ( 1 2 3 ) (Preview) For your entertainment, here is a video of a simple Micro VAWT made from a PC fan motor, wood base and dowel, foam board and poster paper. The electronics come from a broken solar light. The dimensions of the turbine are 10" D x 12" H. The blades are made from paper but could be made from thin s...	Lynx	28	1547	May 5th by crazyguy
	pma and magnets question (Preview) I was thinking about the question marks in the first drawing....nothing happens here. Do you think anything could be gained by the placement of disk magnets in the second drawing? Do you think it's worth the effort? -- Edited by crazyguy on Sunday 5th of May 2013 10:22:11 AM	crazyguy	1	121	May 5th by Lynx
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