ml>> like the wet bulb thermometer? is it just a matter of
 ml>> having two thermometers the same and mounting out with
 ml>> a cloth that is soaked with water?

 JB> pretty much, the last time I looked close at a weet
 JB> thermometer it just has a hollow wick tied over the bulb
 JB> and dipped in a little tank of water

that's what i've seen... if one has a fan blowing over it, does the tank
need to be covered with the wick poking up thru a hole? how much wick would
be too much such that it was drying too fast in the fan blown wind and not
getting to the bulb?

 ml>> i've been by several weather related sites looking at
 ml>> their machines... we've been wanting to have something
 ml>> out here for a long time but the cost has always been
 ml>> prohibitive...

 JB> my little wind-speed sensor died. - it was made from a
 JB> CPU-fan chassis with the iron removed and the sensor in
 JB> the motor wired to the joystick port.

interesting! how did you determine how many PPMs per mph/kph??

 JB> it worked pretty well until the ball-bearing went rusty
 JB> and then the cups (cut from ping-pong balls fell off)

i hear that...

i've also seen "swing meters" for measuring the windspeed...
basically its a vertical rod with a flat piece hinged to the top of the
rod... as the wind blows, it lifts the flat piece. the angle that the flat
piece is raised to is used to determine the windspeed... this is done based
on the weight of the flat piece and the width of it, or so i guess... seems
that a wider piece would raise higher if both are the same weight...

)\/(ark