Vawts my project

[zapmk]

Well, this is my first diary entry and I promised

some of the vawts guys some pic's of my project.

But first I had to get a camera, last one broke.

 



This is the bottom half of the frame, and one of the rotors I was playing with.

This section bolts to the bottom half, I can go up higher if need be

just add another section.

Dang don't you just love a water jet. Oh yeah and somebody to guard the parts.

More water jet parts, and one of the most inportant parts N40 Neo's

Now you know what they are for.

Got to keep the batteries warm. New battery box with a built on charger.

Had to throw in the tickle charger for the Hawt's Guys

Still waiting for the rotors from the water jet Guys, so that's all

for now.

[coldspot]

SWEET !!!!!!!

~`'`'`''`'`'  =  (Me drooling with toung handing out)!!!!lol

please keep posting pictures as you go.

Thanks

[oztules]

me too........  dribble dribble slobber slobber....... there's some serious engineering going on here. .........oztules

[windstuffnow]

  Nice work... keep us updated!

.

[craig110]

Drool is right.  Wow, any project that uses that many magnets definitely gets my attention!  Keep us posted.

Craig

[zapmk]

Thanks guys for looking.

I'll keep the pic's coming, but going to half wait a few days

been cold here and no heat in the garage yet. It was darn cold

win I took the pic's

Been playing with a lot of rotor designs, next I think I'll try

Ed's, lenz 2 design for a rotor.

Hey Ed,

Have you tried your wings with a skewed or with a twist around

the circumference.

Sure love this board and all the Ideas here.

[electrondady1]

vapmk , yours is exactly the sort of geni i,m working towards, that is, a large diameter rotor with lots of poles hooked to a savonias type. i'm very interested what your output will be even at the test coil stage. please do keep us up to date as the machine progresses.nice fabrication,a very strong and stable support platform. the modular feature is great and i think your gonna' need it!

[zapmk]

electrondady1,

Will do, on the coil testing stage. Been keeping an eye

on the jerryrig debate, I think it could be advantageous,

with the torque and slow rpm of this type of setup, with

the large and many pole/coil rotors.

[tecker]

Big rotor . got  data form the  turbine ? Ive used a torque wrench on on my 12" (16 pole )with varied  resistances on several coil designs .Looks like I'll be  varying the load .This allows the turbine to shadow the wind (trickle to full load) . I started using several different controller designs .Works well enough but I 'm getting better results tyeing several turbines   with different rotor outputs to a common load . The large unit seems to be able to swim in there with the smaller satellites and hunt for the big wind . May add another stator to  the satellites mainly as over speed control. Ive been able orient north to west . Nice looking set up your apprentice seems ready for spring also .

[rotornuts]

Below is a Savonius variation I tried. Never made any power(it seems none of my projects do) but I'm wishing I had left it as a straight blade. Before I glassed it I had it set up as a straight blade. It took slightly higher winds to get it going but once it went it really ripped.

I decided to give it the helical shape to see what would happen. I was mislead by the lower wind startup and the appearently smoother operation but what I didn't realize (purely opinion coming up) was that it changed the airflow over the profile and how much blade was exposed to the incident wind. The result is a total reduction in torque.

Conclusion: (more opinion) as of yet I'm not sold on helical blades as I believe they reduce the available torque. Of course it would seem they "spread" the torque around the rotation but at what I think is a reduce sum.

[zapmk]

Yes, the Alt rotors are big 24" and no data as of yet.

Going to be many things to work out.

DanB had point out that with rotors this big

I'll have to watch out for

bearing play and rotor wobble (plate flatness) so I'll

have to wait till they get back from the waterjet and

mock it up to the spindel and then go from there.

Might need to have the rotors surface ground for

flatness.

Flux had pointed out that the inturnal resistance

for a 8 coil prephase wire in star is going to be high.

So as you can see, I'll have my work cut out for me.

But it going to be fun trying

[RobD]

I think I understand why it didn't work well.

If you look at the rotor and imagine yourself as the wind blowing you'll see that the wind is hitting very little of the rotor.

RobD

[spinner]

nice lokin' dual helix!

after playin' around with mine on and off for a year (diary has a pic) I tend to feel that the area where the curves meet at the shaft has a lot to do with lo torq.

in the case of mine, at least;it seems to me that wind (torque supply) moving inward toward the shaft would do more work if it were channeled 'round, past the shaft to strike the other curve and spend whatever remaining torque it had there.

mine is only around a foot from the shaft to the leading edge of either curve, but it is 10 feet tall which helps some in the torque dept.

i probably will be chain driving mine this year as another experiment along with looking at ways to make my 12/9 dual rotor do a better with/for the characteristics of the helix

 

[Canuck]

Nice workmanship.  Anyone who takes this much pride in their work deserves to succeed.  Never give up.