[SFDXA] Turning Radius of an Antenna

[Bill]

      https://dxengineering.wordpress.com/2016/12/16/turning-radius-of-an-antenna/



      Turning Radius of an Antenna

16Dec16

There is a small bit of homework required to establish the turning 
radius of an antenna 
<https://www.dxengineering.com/search/department/antennas>. You have to 
figure out the hypotenuse of a right triangle.

For this exercise we are using the following definitions for the formula:

*R* = Turning Radius

*B* = Boom length from center of the mast

*L* = Longest Element Length from Boom

The diagonal line [*R*] (hypotenuse) in a right triangle can be figured 
out using the following information:

*Width of the triangle* [*B*] would be the distance from the center of 
the mast to the end of the antenna boom. /Note: some antennas are 
offset/ (not balanced 50/50 from the center of the mast), so the boom 
length on each side of the mast may be different. Choose the longest length.

*The Length of the triangle* [*L*] would be 1/2 of the longest element 
length (usually the rear reflector).

The formula for the hypotenuse is: [*R]* = Square Root of (*B*^2 + *W*^2 )

For the following example:

The longest boom length from the center of the mast of the antenna is 
[*B*] = 15 feet.

The longest element length is 24 feet, so use half of that length which 
makes [*L*] = 12 feet

The hypotenuse [*R*] of the right triangle (*which is the Turning 
Radius*) would be: 19.209 feet.

(Be safe and round it up to 19.5 feet).

turning radius of antenna