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Homer,
a 5/8 is not twice the height with more wind load when mounted at the same tip height as designed,

my astroplane is mounted on a 12ft 1.5" mast inside about 7ft of scaffold pole so i can adjust the length above the isolator,

from the isolator to the tip of the astroplane hardly flexes at all in 50mph winds,
my other antennas use skinny tube & flop around in the wind,

the astroplane has more wind catching area & weight high up near the tip than other antennas mounted at the same tip height,
the bending moment at the isolator 5/8wave down from the tip is far higher with an astroplane than say the 1-10k.

[QUOTE="bob85, post: 593238, member: 18"] Homer, a 5/8 is not twice the height with more wind load when mounted at the same tip height as designed, my astroplane is mounted on a 12ft 1.5" mast inside about 7ft of scaffold pole so i can adjust the length above the isolator, from the isolator to the tip of the astroplane hardly flexes at all in 50mph winds, my other antennas use skinny tube & flop around in the wind, the astroplane has more wind catching area & weight high up near the tip than other antennas mounted at the same tip height, the bending moment at the isolator 5/8wave down from the tip is far higher with an astroplane than say the 1-10k. [/QUOTE]

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