The Eternal Squire wrote:
"I`m considering a vertical dipole array, one each in 3 corners of a
triangle---."

ON4UN has a section on "Triangular Arrays" beginning on page 11-48 of
"Low-Band DXing". Check the rest of the book. Use vertical polarization
if you have good soil conductivity or adequate radials. Otherwise,
horizontal polarization may work better. Avoid inductive loading of
short verticals. Instead use capacitive hats. The book is a winner.

Best regards, Richard JHarrison, KB5WZI