[RE-wrenches] guyed tilt up tower suggestions

[Jay]

Hi Dan

Are there any wind machines you would recommend?

Jay
Peltz Power

> On Apr 1, 2021, at 1:34 PM, Dan Fink <danbob88 at gmail.com> wrote:
> 
> 
> Chris; I would be kicking and screaming regarding installation of anything provided by that company, including their turbines, controllers, and diversion load heaters. They don't seem to have a grasp on even the basic concepts of successful small wind installations. They don't provide power curves or performance data, and don't seem to understand the physics behind how the number of blades, tip speed ratios, etc. relate to output performance. That "1.6 kW" turbine your customer wants has only a 5-foot diameter rotor! 1.6 kW in a 60 mph wind maybe.
> 
> How tall does the tower need to be to get at least 30 feet above any obstructions within 500 feet, and will the system need AHJ permits? Anything under 40 feet is a waste of the homeowner's money. 
> 
> You can get steel tower coupling sections fabricated and use standard steel tubing (NOT pipe) for the tower sections. These are easy to work with, and I have even seen them approved and wet stamped by engineers, up to ~80 feet anyway. (photo attached)
> 
> SWWP used to sell metal couplers to fit standard pipe, which made for a noodly tower, but it was OK, and engineered that way, and has engineering drawings. Not sure if anyone still makes those, perhaps the Indian company that bought out SWWP's designs? I'm guessing you have a DIY type homeowner and that they won't want a tall tower (sigh).
> 
> Another option is surplus NRG towers, which have swaged ends that slide together, and guy wire rings that slide over the joints. I've seen these successfully fly fairly large turbines approaching 150 feet tower height. Not engineer-stamped for that application though, they are MET towers. And probably WAY more sturdy and expensive than what you need for that dinky "1.6 kW" turbine.
> 
> If you can't decline the job, I'd go with couplers, either fabricated with and for steel tubing, or those SWWP couplers if you can find them.
> 
> Dan Fink
> Owner, Buckville Energy Consulting LLC
> IREC Certified Instructor for PV and Small Wind Installation
> NABCEP Certified PV System Inspector
> NABCEP PV Associate
> danbob88 at gmail.com
> 970-672-4342
> 
>  
> 
> 
>> On Thu, Apr 1, 2021 at 12:43 PM Chris Schaefer <chris at solarandwindfx.com> wrote:
>> G'day All,
>> 
>> We don't seem to see much on wind these days on the wrenches, so now is the time to blow out some of the cobwebs. Anyway, I'm getting dragged kicking and screaming into a Missouri Raptor 7 blade Freedom 1.6kw offgrid wind project and in search of a tilt up tower. Back in the day it would have come from SWWP but now I haven't a clue. The client already purchased the turbine but if you have any experience with this unit and things to be aware of that would be appreciated as well. System voltage is 48vdc.
>> 
>> Stay healthy my friends,
>> Christopher-
>> Chris Schaefer’s
>> 
>> Tel/Fax 585-229-2083 or Cell 585-748-1870 
>> 5115 South Hill Road ~ Canandaigua New York 14424
>> www.solarandwindfx.com ~ E-mail: chris at solarandwindfx.com
>> 
>> 
>> 
>> Thomas Jefferson, the author of our great Constitution, once said, "democracy" will cease to exist when you take away from those who are willing to work and give to those who would not."
>> 
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