"Richard" wrote in message
...
Is anyone engaged is a design philosophy that seeks the design of VHF
yagi's
with the smallest acceptable diameter of elements?

What you are trying to do is to design lighweight VHF yagis, you are
seeking
how small you can go with element diameters before performance begins to
suffer.

Richard,
I think if it is heavy enough to physically support itself, it will be
electrically OK. This turns out to be about 1/4 inch (6 mm) tubing at 50
MHz, and 1/8 inch (3mm) hard aluminum rod at 144 MHz and above.

Tam/WB2TT