The new dual mast is flying.

[Jerry]

Here are some pix of my dual mast. This one has replaced to single 1.5" schedual 80 that bent at 4 ft above its support. I'm flying a set of 7ft Lakota blades on a 2025 watt motor conversion.



This is the under side of the top bearing.



This is the top side of the top bearing.



This is the black schl. 80 that will come through the top bearing. Top bearing is removed.



This is the platform at the bottom of the mast. The "A" hub keeps it secure to the platform.



This is the big flange bearing under the platform. The 1.5" mast is supported by this bearing and the top bearing. The hole mast turns and yaws with the wind. The genny is mounted solid to the 1.5" at the top. Wire will come down the center of the 1.5" #80 pipe.

2" pipe is 8 ft long and stationary. The bearings alows the 1.5" #80 mast to turn inside the 2" pipe. The 1.5" #80 pipe is 10 ft long.

The 2" pipe is supported up to 44" from the top and the top bearing.

OK thats my update. Had very strong wind today and its working very well.

                  JK TAS Jerry

                             

[Jerry]

Whoooops that second picture is wrong. I hope this is the right one?



This should be the top veiw of the top bearing?

                    JK TAS Jerry

[Jerry]

This picture was takin from a 10 ft step ladder. You can see the crank/wench at the right at the bottom. Behind the pipe mast on either side you can see the littel rail road tracks that take the platform to the top. the platform is resting on the ground at the bottom of the tower.

I just crank the wench up and the hole thing goes to the top. When it reches the top a click is heard and its locked in. To bring it down just turn the crank a littel tighter, another click is heard and then you just uncrank it and it comes back down.

An old radio ameture built this free standing tower in the 70s. It was originaly 70 ft. Now it 40 ft and I have about 6 ft mast above that.

                JK TAS Jerry

[Shadow]

This is a very neat setup! If I understand this correct, the two bearings  support the weight of the generator and the pipe, right? What size cable do you use in your winch? And this is still a freestanding tower right?

[Jerry]

Hi Shadow.

I'm not sure of the wench cable size. It was part of the tower as purchased.

Yes the bearings hold the weight of the 1.5" pipe and the genny and 45 ft of 4 each 8 ga. wire.

I think this is a fairly light load for bearings of this size and the rpm is basicly 0 just back and forth slowly depending on wind direction.

I fly small wind gennys. This one is 7 ft. No need for furling here or on these small machines. The bearings alow these small gennys (most 49") to track the wind very well.

I think this machine and mast wieghs around 60 to 70 lbs total?

I think per watt motor conversions are lighter than dual rotor?

                    JK TAS Jerry

[hiker]

hey jerry:  any pictures of the gen up and flying with those lakota blades?

[Jerry]

Hi hiker.

I'll try to get you a picture in the next day or 2. My camera won't take a good pix from that distance but I'll try.

                             JK TAS Jerry