My first geared windy nation pma

Discussion in 'Post Your Photos' started by bluejay, Jun 21, 2010.

  1. Minnesota

    Minnesota WindyNation Engineer

    "Treasure your failures, as they lead to understanding, and from that, progress and success." - a famous Fearless Thinker. :D
  2. bluejay

    bluejay WindyNation Engineer

  3. leamywind1

    leamywind1 WindyNation Engineer

    Nice job Blue. Can't wait to see some production numbers.
    Thanks for the post.
  4. murray2paddles

    murray2paddles WindyNation Engineer

    Good to see it spinning, thanks for the update!
    What blades are on that one, which turbine ?
  5. mark99

    mark99 WindyNation Engineer

    Looks really good bluejay,I am glad to see you up and running.Did you change the tail section it looks bigger? Mark99
  6. bluejay

    bluejay WindyNation Engineer

    I will get stats once she breaks in and we have good winds...The day it was spinning it was putting ou 20-45 watts (7-10mph)once unhooked from the batteries...My batteries are becoming junk and lose voltage over a few days if unused.takes a minute to get them back to full charge.Cant wait to find a way to run 24v directly tied to the grid. The GT that have a dump on board start at 10.5 v ..way to low for these gears..Gearing has to be done according to what voltage you want to run(no more over speed crashes!) :p

    Mark the tail is bigger and I weighed everything,even bought a accurate hanging scale for the blades(10.6's). One was 15 grams heavier so I used extra washers on the other 2....There was 30 lbs of weight put behind the mount, the same distance as the motor is in front. The whole unit weighs around 100lbs and the larger tail keeps it smooth into the wind without jarring side to side that you see in the light small units...
  7. bluejay

    bluejay WindyNation Engineer

  8. bluejay

    bluejay WindyNation Engineer

    Well 20 mph winds and only 60 watts :x It looks to only be spinning at about 60-75 rpm :( ..
    I wanted it to spin at least fast enough to catch all the air...almost feel like a 20 tooth will be perfect but might not stand up to those crazy 60mph winds I have on occasion..

    Thank you tom T for the idea of diodes blocking backfeed from the batteries..The inverters starting draining the volts at 22 and the bank acts as a invisible load and has plenty room for storage if the grid goes down and my trip is set at 28.I doubt the dump would trip very often at all this way.Anything over 22 is ate up by the grid ties so the batteries dont get filled much but just trickels of raising voltages.

    So in theory I could add more turbines and grid ties to stay in that voltage range while really pumping up the amps.

    I see that potential with this gearing for a larger wind farm.I was just hoping for big numbers and dont see them.. The blades are rated at 450rpm so if I had a secure enough system that means at a 2:1 ratio I could still spin the motor at 800 rpm and that would be big numbers...But then you would be looking at large voltage spikes from the turbines during irratic wind gusts.

    I do ask that you guys give feedback otherwise its just a waste posting here.I can talk to myself whenever I want without the internet! :lol:
  9. TomT

    TomT WindyNation Engineer

    One reason for the blocking diode between the rectifier and the battery was so I could send power from the turbine to the grid tie and not drain the battery. It also locks the turbine to the battery voltage. If the grid tie shuts down the power will continue to go to the battery without letting the turbine free wheel.
  10. john b

    john b WindyNation Engineer

    i am thinking of using a tower like yours. it is about 30ft and has not ben used since cable came in.did you hinge it.
    i want to be able to raise and lower as i am sure the first set up will not be the last as i am in a low wimd area and
    plan on a geared sysytem
  11. bluejay

    bluejay WindyNation Engineer

    Not hinged,figured it would be a weak point. If you are going to use 9 ft or small blades you should be fine if your welds are deep and good...

    Today,,I put a 20t back on...I had it on with the 12 v system,,Didnt think it turned fast enough. Now that is my safety net..If we have bad winds I can just hook to a 10.5v grid tie and slow the rpms down with out braking it. With the diode covering the battery side it wont let the 24v backfeed if I hook up the 12v gridties..easy to switch from a 12v to a 24v system :mrgreen: :ugeek:
  12. TomT

    TomT WindyNation Engineer

    Hope that works for you. Like the little platform you have to work on it. :D
  13. bluejay

    bluejay WindyNation Engineer

    15 mph winds today and over 220 watts :D ..I also see once many of these are running I will also run a 22v GT on the battery side to keep this creeping up voltage in check. I only want the dump to switch in a power outage!
  14. john b

    john b WindyNation Engineer

    there is a 3 leg tower that i can have. it has been up for a long time and the bolts are rusty. any suggestions on how to get the tower down?
    gin pole, just let it drop like a tree, hook a line and pulley to a tree, saw the legs off and lower it down?
  15. TomT

    TomT WindyNation Engineer

    Most use a gin pole. Also a bottle jack and 2 boards stuck thru the tower to get them apart.
  16. john b

    john b WindyNation Engineer

    any idea the weight of the tower. it seems to be 10foot sections and this one is about 3 sections.
    john b
  17. dlmcbm

    dlmcbm WindyNation Engineer

    Rohn tower like above is about 50 lbs a section. yes they are 10 ft. sections.
  18. bluejay

    bluejay WindyNation Engineer

    Sorry dsl was jacked for a day and half..How much I missed the internet! This tower is 2 and a hlaf sections with the five foot section,4 foot in concrete. This left a connection 1 foot above the concrete slab and I am planning on making a small encasement of concrete 3 feet up so it will be buried in concrete..

    I have learned that the 1 1/4 pipe bolted to the tower with the 1 1/2 pipe that slides over needs to have your turbine 10lbs overweighted in the back. Otherwise once the wind starts and is low 8-10 mph it tends to push back and rock that 1/4 difference but by making the back a hair heavier it never rocks..Wish I could find a true bearing that would work at the bottom of the two pipes.

    I saw 613 watts the other day in a gust that had to of been over 30mph(was averaging 18-20). I am excited about building more but am also confused..All the big boy inverters want high voltages and this will spell doom for this gear ratio and low wind output. I really want to keep the volts under 30 and pump up the amps but also want to get legal to sell electric back someday and do not want to have to redesign for a new inverter thats ul approved :?:
  19. timber

    timber WindyNation Engineer

    Hi Bluejay,

    Just curious, but is there some way that you can put more than one turbine in series after rectified to get the higher voltages need? Only reason I ask is that I know you have quite a few turbines up now. Just a thought.

  20. murray2paddles

    murray2paddles WindyNation Engineer

    Check out Larry's posts under the Griggs ties, he has been explaining too everyone for white some time now how he runs 4 turbines to one bar after the rectifiers.

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