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  • From: <clearviewfarm AT bluefrog.com>
  • To: "Market Farming" <market-farming AT lists.ibiblio.org>
  • Subject: Re: [Market-farming] help with bower on tunnel
  • Date: Mon, 28 Dec 2009 12:12:40 -0800

Steve,

A picture (or 2 or 3) would be worth a thousand words.

Thanks,
Kurt Forman
Clearview Farm
Palmyra, NY 14522

--- MAsteveINE AT 207me.com wrote:

From: "MAsteveINE" <MAsteveINE AT 207me.com>
To: "Market Farming" <market-farming AT lists.ibiblio.org>
Subject: Re: [Market-farming] help with bower on tunnel
Date: Mon, 28 Dec 2009 10:49:21 -0500


On a blower like a 4C440 you can put coffee can cover attached with one of the screws at the air intake
to make a slide control of the air inlet hole.
With new poly you will cover almost all of the air intake and keep the poly just tight enough so that it is not popping and rattling in the winds. An occasional pop on a gusty day is better than overinflating.
As things happen that make holes in the poly you then allow in more air.
 
The engineers call for "3/8 of an inch of water column pressure" and you can make a gage with a piece of
clear (1/4 or 3/8 inch) plastic tube about 4 feet long. Hot glue one end of the tube into the inner layer of poly, attach the tube to a board in a U shape that is below the attachment place in the poly. Add a couple tablespoons of antifreeze into the open end of the tube. The presure of the  air coming from the
poly air space should push the liquid so that the fluid level is about 3/8 of an inch from even in the two legs of the U. If it is not adjust the air intake of your blower.
 
If you are as confused from reading as I am from writing, yell and I will go take some pictures.
 
Greenhouse poly will take apart or break the best of steel greenhouse frames if over inflated or in a
major wind event.
 
 
MAsteveINE
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