[TowerTalk] Where does the element go?

[Ted Bryant]

If I remember my Statics & Dynamics correctly, the gravitational forces on a horizontal element(and
the resulting torque on the boom) are the same whether it's mounted above or below the boom.  For a
symetrical element mounted at its center, rotational torque due to gravity should very close to
zero.

I suspect the decision whether to mount the element above or below the boom is affected more by
other factors.

73, Ted W4NZ


On 22 Nov 2006 at 19:42, Bill Turner wrote:

> Nearly all of the all-metal yagis I've seen have the elements mounted
> on top of the boom. I wonder why?
>
> If they were mounted under the boom, gravity would be working to keep
> the boom in place instead of constantly trying to turn the boom over.
> This is such a common design I'm wondering what am I missing?