Nice. IT's a necessisary comparrison, that we are glad to actually see. The two bladed Savonius on the left is going a bit slow, but it does have good torque power though which is good for using "gears" to change generator rotational speed, but is innefficent at certain angles to the wind...so maby a third blade at least is needed. ... you probably already know this...or have a similar one (or 3 bladed on) stacked on top of it, and offset at an angle, probably 90 degrees. Torque and Speed good
@mamawachibi2 I'm not sure, but maby your right about that. It might prevent some extra vibration and then wear on the bearings, and efficency loss. Thanks.
@mamawachibi2 A wind director (or deflector / baffle ) can be used on one side of the turbine to prevent drag there, and I guess prevent some vibration like you said, so then maby a 3 bladed one is ok if a wind director is used. Thing is, it complicates things because it needs to be "steered" with the wind.
How did you calculate the design: diameter and height of the unit? How did you design amount, size, shape and angle of the buckets? Your design looks great. Simple and efficient. Did you just use trial and error? I like the buckets in three flat segments. Congratulations.
My construction turned out to be a disaster. I used the wrong materials, glue etc. I build a better one, with multi-buckets but was not lucky with that one too. My prototype was spinning like a charm for a few minutes but one of the tire wraps broke, so the turbine is damaged. I can't show you anything yet, but I saw the power so I'm still motivated to start all over again. Thanks for the comment on my airbrush.
Nice comparison. There is enough difference to confirm efficiency in the multi vane.
stevenmiles 1 month ago
@stevenmiles
Thank you for the comment (^o^)/
mamawachibi2 1 month ago
Nice. IT's a necessisary comparrison, that we are glad to actually see. The two bladed Savonius on the left is going a bit slow, but it does have good torque power though which is good for using "gears" to change generator rotational speed, but is innefficent at certain angles to the wind...so maby a third blade at least is needed. ... you probably already know this...or have a similar one (or 3 bladed on) stacked on top of it, and offset at an angle, probably 90 degrees. Torque and Speed good
trailkeeper 1 year ago
@trailkeeper
Thank you for the comment trailkeeper.
I think that what you say is correct.
However, it is thought that the number of blade of Savonius should be the even numbers.
It is because the wind to which that flows in Savonius becomes smooth.
I want to experiment on these sooner or later.
mamawachibi2 1 year ago
@mamawachibi2 I'm not sure, but maby your right about that. It might prevent some extra vibration and then wear on the bearings, and efficency loss. Thanks.
trailkeeper 1 year ago
@mamawachibi2 A wind director (or deflector / baffle ) can be used on one side of the turbine to prevent drag there, and I guess prevent some vibration like you said, so then maby a 3 bladed one is ok if a wind director is used. Thing is, it complicates things because it needs to be "steered" with the wind.
trailkeeper 1 year ago
@trailkeeper
I also think that it is a good idea for wind director to raise the efficiency of SAVONIUS.
"Efficiency might fall into wind director according to the usage.
Because the effect being sucked out for the wind that passes SAVONIUS is obstructed."
....I have read this report.
Therefore, wind director should be tested enough and be used.
Thank you trailkeeper.
p.s. I will also try tortilla pizza. (^o^)
mamawachibi2 1 year ago
Hi there
Seems like you can some good power of these turbines.
Great craftsmanship.
Keep it up
Greetings from Belgium
Erik
rikkiesix 1 year ago
@rikkiesix
Thank you for the comment Erik
You gave the message.
Then I become energetic.
I think about a new turbine now.
Next time, please come to see my video.
Thank you.
mamawachibi2 1 year ago
How did you calculate the design: diameter and height of the unit? How did you design amount, size, shape and angle of the buckets? Your design looks great. Simple and efficient. Did you just use trial and error? I like the buckets in three flat segments. Congratulations.
750RanchRoad 1 year ago
#1
Thank you for the comment.
The rated speed of the dynamo that uses it is 120[rpm].
I want 2[rev/sec] (120[rpm]/60[sec]) in 4[m/s] wind speed.
When the wind speed and the ratio at the bucket center speed are 2:1(assumed it).
Then bucket center speed should become 2[m/s].
To become 2[rev/sec] by 2[m/s], the diameter at the bucket center becomes 0.32[m].
D=2[m/s]/2[rev/sec]/3.14=0.32[m]
to #2
mamawachibi2 1 year ago
#2(from #1)
Actually a diameter at the bucket center is 0.3[m].
And the outside diameter is 0.6[m].
The shape of the bucket was drawn in figure so that the flow of the wind may become smooth and decided.
Height is not calculated.
It makes it to the length of the bought material. 0.91[m](1yd)
I want to reduce the diameter a little more.
I think that height is also a little insufficient.
I think that the shape of the bucket is good.
I'm sorry in strange English. (^^;)
mamawachibi2 1 year ago
Very nice comparison! I'm building one like the left one. I know already which model my next will be. Thanks for sharing
knovos 2 years ago
Thank you for the comment. Please show the wind turbine. By the way, the airbrush is wonderful. It is like magic.
mamawachibi2 2 years ago
My construction turned out to be a disaster. I used the wrong materials, glue etc. I build a better one, with multi-buckets but was not lucky with that one too. My prototype was spinning like a charm for a few minutes but one of the tire wraps broke, so the turbine is damaged. I can't show you anything yet, but I saw the power so I'm still motivated to start all over again. Thanks for the comment on my airbrush.
knovos 2 years ago