Saturday, January 26, 2013

You Learn Something New Every Day

I answered a call at work from a construction contractor wondering how much static pressure one of our company's fans that he had was designed to generate.  The fan was a direct drive fan with a double shaft motor and a prop mounted at each end.  He explained that they were installing a storage tank, and they would lift the lid in place with a fan like this.  I tracked down the information, then asked one of our senior engineers about the process.  He told me that, yes, they construct the lid on forms inside the tank, install a seal around the edge of the lid, then turn on a fan which would build up pressure on the bottom of the lid and raise it into place.  Then, they would drive in pins to hold it in place.  I had never heard of that before, so I went and found a video.  Pretty cool:

I would think that would be one of the more stressful parts of the job. You've got a lot of money riding on that cushion of air.

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