David Gilbert wrote:
> I agree ... rig an alarm that goes off when the wind speed gets too
> high, but control the tower yourself.
>
> It's not that difficult to design your own alarm, but here's a
> commercially available system that would be easy to set up:
>
> http://www.inspeed.com/anemometers/WindSwitch.asp
> http://www.inspeed.com/anemometers/Vortex_Wind_Sensor.asp
>
> 73,
> Dave AB7E
>
>
>
something like the tilt switch on a pinball machine: a pendulum hanging
inside a conductive ring that the wind pushes, would probably work.
Adjust either by looking up the deflection angle vs windspeed (there's a
formula out there for a sphere on the end of a rod) or test it in a car.
Things with spinning rotors or fans tend to either be expensive if
designed for 20 year lifespan or fail in a few years.
If you want to get fancy, put straingages on the tower legs and directly
measure the load on the tower.
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|