On Tue, 22 Feb 2005 00:21:57 -0000, "Ady"
wrote:

Thanks for all your kind posts, but no-one has answered the true question of
the way the anemometer should point ?

Should it be set up to point North or South to get accurate recordings.

The wind vane, when indicating north, should be pointing north.

--
Alan White
Twenty-eight miles NW of Glasgow, overlooking Loch Goil and Loch Long in Argyll, Scotland.
Web cam, http://www.windycroft.gt-britain.co....her/kabcam.htm
Web site, http://www.alan.lesley.ukgateway.net

Dave Liquorice wrote:

No need for a compass, which gives you magnetic north not true north
anyway, just use the sun at midday (for south) or the sun at anytime
and point the hour hand of a proper watch at it the 12 then points
South.

I think for this to work (apart from the other comments about the
equation of time) you *bisect* the angle between the sun and the hour
hand to give south? In the northern hemisphere, of course.
--
Steve Loft, Wanlockhead, Dumfriesshire. 1417ft ASL
http://www.wanlockhead.org.uk/weather/
Free weather softwa http://cumulus.nybbles.co.uk/
Experimental webcam: http://www.wanlockhead.org.uk/webcam.php

Dave Liquorice wrote:

No need for a compass, which gives you magnetic north not true north
anyway, just use the sun at midday (for south) or the sun at anytime
and point the hour hand of a proper watch at it the 12 then points
South.

I think for this to work (apart from the other comments about the
equation of time) you *bisect* the angle between the sun and the hour
hand to give south? In the northern hemisphere, of course.
--
Steve Loft, Wanlockhead, Dumfriesshire. 1417ft ASL
http://www.wanlockhead.org.uk/weather/
Free weather softwa http://cumulus.nybbles.co.uk/
Experimental webcam: http://www.wanlockhead.org.uk/webcam.php

Dave Liquorice wrote:

No need for a compass, which gives you magnetic north not true north
anyway, just use the sun at midday (for south) or the sun at anytime
and point the hour hand of a proper watch at it the 12 then points
South.

I think for this to work (apart from the other comments about the
equation of time) you *bisect* the angle between the sun and the hour
hand to give south? In the northern hemisphere, of course.
--
Steve Loft, Wanlockhead, Dumfriesshire. 1417ft ASL
http://www.wanlockhead.org.uk/weather/
Free weather softwa http://cumulus.nybbles.co.uk/
Experimental webcam: http://www.wanlockhead.org.uk/webcam.php

Dave Liquorice wrote:

No need for a compass, which gives you magnetic north not true north
anyway, just use the sun at midday (for south) or the sun at anytime
and point the hour hand of a proper watch at it the 12 then points
South.

I think for this to work (apart from the other comments about the
equation of time) you *bisect* the angle between the sun and the hour
hand to give south? In the northern hemisphere, of course.
--
Steve Loft, Wanlockhead, Dumfriesshire. 1417ft ASL
http://www.wanlockhead.org.uk/weather/
Free weather softwa http://cumulus.nybbles.co.uk/
Experimental webcam: http://www.wanlockhead.org.uk/webcam.php

Ady wrote:
Thanks for all your kind posts, but no-one has answered the true question of
the way the anemometer should point ?

Should it be set up to point North or South to get accurate recordings.


If you mean the arm on the anemometer - it doesn't matter which way it
points. You have to align the wind vane using the red marks, as
described in the manual. But it's possibly easier to ignore the red
marks as follows: Take the wind vane off the anemometer. Turn the shaft
until the display shows 180 (note that there's a lag of up to about 10
seconds before the display updates). Without disturbing the shaft, align
the wind vane so that the 'nose' is pointing south, then fit the vane to
the shaft and tighten the screw.

--
Steve Loft, Wanlockhead, Dumfriesshire. 1417ft ASL
http://www.wanlockhead.org.uk/weather/
Free weather softwa http://cumulus.nybbles.co.uk/
Experimental webcam: http://www.wanlockhead.org.uk/webcam.php

Ady wrote:
Thanks for all your kind posts, but no-one has answered the true question of
the way the anemometer should point ?

Should it be set up to point North or South to get accurate recordings.


If you mean the arm on the anemometer - it doesn't matter which way it
points. You have to align the wind vane using the red marks, as
described in the manual. But it's possibly easier to ignore the red
marks as follows: Take the wind vane off the anemometer. Turn the shaft
until the display shows 180 (note that there's a lag of up to about 10
seconds before the display updates). Without disturbing the shaft, align
the wind vane so that the 'nose' is pointing south, then fit the vane to
the shaft and tighten the screw.

--
Steve Loft, Wanlockhead, Dumfriesshire. 1417ft ASL
http://www.wanlockhead.org.uk/weather/
Free weather softwa http://cumulus.nybbles.co.uk/
Experimental webcam: http://www.wanlockhead.org.uk/webcam.php

Ady wrote:
Thanks for all your kind posts, but no-one has answered the true question of
the way the anemometer should point ?

Should it be set up to point North or South to get accurate recordings.


If you mean the arm on the anemometer - it doesn't matter which way it
points. You have to align the wind vane using the red marks, as
described in the manual. But it's possibly easier to ignore the red
marks as follows: Take the wind vane off the anemometer. Turn the shaft
until the display shows 180 (note that there's a lag of up to about 10
seconds before the display updates). Without disturbing the shaft, align
the wind vane so that the 'nose' is pointing south, then fit the vane to
the shaft and tighten the screw.

--
Steve Loft, Wanlockhead, Dumfriesshire. 1417ft ASL
http://www.wanlockhead.org.uk/weather/
Free weather softwa http://cumulus.nybbles.co.uk/
Experimental webcam: http://www.wanlockhead.org.uk/webcam.php

Ady wrote:
Thanks for all your kind posts, but no-one has answered the true question of
the way the anemometer should point ?

Should it be set up to point North or South to get accurate recordings.


If you mean the arm on the anemometer - it doesn't matter which way it
points. You have to align the wind vane using the red marks, as
described in the manual. But it's possibly easier to ignore the red
marks as follows: Take the wind vane off the anemometer. Turn the shaft
until the display shows 180 (note that there's a lag of up to about 10
seconds before the display updates). Without disturbing the shaft, align
the wind vane so that the 'nose' is pointing south, then fit the vane to
the shaft and tighten the screw.

--
Steve Loft, Wanlockhead, Dumfriesshire. 1417ft ASL
http://www.wanlockhead.org.uk/weather/
Free weather softwa http://cumulus.nybbles.co.uk/
Experimental webcam: http://www.wanlockhead.org.uk/webcam.php

On Tue, 22 Feb 2005 08:55:36 GMT, Steve Loft wrote:

I think for this to work (apart from the other comments about the
equation of time) ...

Which are pretty much the same error as that from using a magnetic
compass, which also varies depending on your location. B-) And
without proper sighting and reasonable view it's all a bit hit 'n miss
anyway.

... you *bisect* the angle between the sun and the hour hand to give
south? In the northern hemisphere, of course.

This is true, I like this page of explanation, pretty picture that
illustrates the principle better than just words.

http://www.time4watches.com/Watch%20...ch_as_a_compas
s.htm

http://makeashorterlink.com/?T2491288A

--
Cheers
Dave. pam is missing e-mail