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Concept for anemometer......

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Alan Haisley:

--- Quote from: John Hill on December 20, 2010, 12:29:58 AM ---So true Bogs but this is Madmodders, you should post that one on the macrame board! :med:

--- End quote ---

Ah, but there needs to be a pivoted clamp and pivot arm. Otherwise how would you hold it or invert to check for freezing?  :dremel:

Alan

DMIOM:

--- Quote from: Alan Haisley on December 20, 2010, 05:35:42 PM ---Ah, but there needs to be a pivoted clamp and pivot arm. Otherwise how would you hold it or invert to check for freezing?  :dremel:

Alan

--- End quote ---

   :smart:

Ahh ... this all starts to make sense now, we can put some of the jigsaw together of Dr Bogs's invention.  All this work, both on swing-up toolholders and on motorised rotabs wasn't really for threading or machining, it was to provide angular reciprocation so the angle of the dangle of the string can be measured ; and his work on ultra fine nozzles wasn't really for mist cooling but to provide a precision calibration of the string's deflection!

Dave   :coffee:

Bogstandard:
Just to answer a few questions about this revolutionary piece of equipment.


--- Quote ---How long should the piece of string be?
--- End quote ---

Actually, it has to be made precisely the correct length for the part of the world you live in.

For an area that suffers from strong winds, it doesn't need to be too long as you could end up hanging yourself, as the wind blows it everywhere, or to counteract that effect, a one pound weight on the end may cure the problem. But that is only a theoretical assumption, field trials should give more understanding of what is really required.

For wet or dry countries, for wet, you can have it much longer, as the drips will easily reach the end, but say in a desert region, a lot shorter, otherwise you will be waiting forever for the drips to get to the bottom to drop off.



--- Quote ---Ah, but there needs to be a pivoted clamp and pivot arm. Otherwise how would you hold it or invert to check for freezing?
--- End quote ---

It has been found during field trials that the thumb and forefinger is perfectly adequate for a portable version of this instrument, and it has also been found that either left or right hand digits can be used without any detrimental effects to the readings obtained. The use of gloves in such a cold environment is thoroughly recommended, as removing string from between frozen to it digits can be rather painful.

One major point regarding safety must be raised (the dreaded H&S). If the area to be checked is both freezing AND windy, special care must be taken to keep a vice like grip on the instrument. There are cases where people and objects have been impaled by lengths of frozen string.

For lab work, a small crocodile clip has been found perfectly adequate, if wind speeds are kept fairly low.


Bogs


BTW, do you really want to keep all this bullsh going?

Bernd:
I found a link in my favorites while looking for something else.

It's a link to building an anemometer. Might be helpful to somebody that wants to build one. LINKY HERE

Bernd

Bogstandard:
Link doesn't work for me Bernd.

John

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