A little better (new rotors/video)

[timmy]

but probably more suited for my Amtek 30vdc motor.  

the motor in this video (my first video btw), does cog a bit and requires a higher wind speed to start. It did reach charging voltage in the shot of about 15.5 volts open (when you see 3 blades slowly turning to the right).  When you see multiple blades or anything turning to the left, it was less than 12v.

Still playing with the vane some as well, effective, but not real attractive.

http://www.youtube.com/watch?v=aILqZt6-VLg

[Birdmmjb]

Timmy what size blades are you using.

I have a 30 volt moter and a large set of blades and rarely get to 12 volts.

Any information on your blades and what you think the wind speed was in your video would be welcom.

Jan

[timmy]

Jan,

these are the 36" diameter TLG Tri-Nado MM rotors and hub.  Guessing the wind was at 10mph to 15mph, but only a quess.  Wind has been highly erratic today from SE, S and SW., ranging from 3 mph to 25 mph.  Wind Gen is only about 12 feet off ground and catching alot of turbulance from my garage to the left (not seen in video), garage to the right and my house (I am standing right outside sliding glass door during video shoot), not to mention everything else ground level

According to TLG data on this rotor, 15 mph produces aproximately 750rpm (on Amtek 20v,30v and 40v motors).  At 15.5 volts with this motor I was only at 178rpm, I think that is due to cogging (180v motor at 0.0871v per rotation versus published 0.0334v on my Amtek 30).

I will be trying the rotors on my Amtek 30 once I get a little extra money to purchase an arbor.  I also want to hook the 30 up to a friends drill press to get an actuall (or at least very close) volt per rotation reading.

I'll post my findings of the Amtek 30v paired with these rotors if you would like.

Best

Tim

[Norm]

You ought to have it where those tree branches are whipping around like crazy.

         ( :>) Norm.

[timmy]

I am hoping to get it finished before too long and mounted on the garage, I may be pushing my luck at that - have to see what our city council says

30 feet high would be nice though!

[timmy]

maybe a better shot with VM in video, still a very breezy day today so great to get a better idea of what is going on.

http://www.youtube.com/watch?v=2Vsb3J14f7E

sorry, I don't know though the speed of the wind gust that took it to 25.9 volts, I believe about 18 mph or slightly less going by my next door neighbors weather site.

[pepa]

 a offset motor and tail bearing type tail will help hold the blades into the wind without yawing so bad. it can be done with wood usng a door hinge for a temperary setup. good start. pepa

[SparWeb]

The mill is getting whipped around a lot by the turbulence around your house.  If you could just take the unit out of town for an afternoon and clamp it to a field fencepost or something you would probably learn more.  Then try this:

Put a ribbon on the tail, which will tell you the true wind direction.

If the mill is still hunting about, grab hold of the tail and keep the ribbon lined up yourself.

The mill will probably stabilize its speed, and maybe even run faster.

Any wind-speed / RPM / power data you collect while doing this will be more reliable.

Just be careful as you approach the spinning mill!  This is not a wise practice with windmills larger than yours!

I also think it's neat when the blades turn at the video frame-rate.