N4aeq wrote:

First off if size is no problem then what would be the advantage to
two stacked yagis opposed to one long yagi, considering the gain of
each setup would be equal?


We use a 4 over 4 array for 6m that I designed for the VHF contests.
The advantage for us, in the northern midwest, is that I was able to
make a relatively high gain system, 10.5dBd free space, that had no dead
spots in the pattern, as well as a main lobe that was over 45 degrees
wide at -3dB. The F/B is intentionally only about 18dB. It's nice to
have a pattern with no deep nulls in the midwest, because the signals
can come from any direction, and there are usually no, or few, big
signals to cause problems. We can also cover a broad area, easily 90+
degrees, during openings with the main lobe without turning.

On the other hand, if I was on either coast in a high population density
area, I would want a long yagi with as much F/B and F/S as I could get.

Whenever possible, you design and build what is best for your location.

tom
K0TAR