[Mobile-Portable] Thoughts on inverted "C" on car?

[DavidE Benedict]

You guys have a ton of good experience. Great to see these reflectors.

I have installed an Icom AH-4 tuner and it works 80-6m using a 102 inch
whip which is mounted atop the rear corner of my station wagon roof. I got
the grounding problems taken care of. (By the way, I mounted the AH-4 on
the headliner in the old stationwagon/hamshack, positioned directly under
the whip. 

My thought now is to mount another metal pole (insulated/unterminated) at
the front bumper area and string a wire between their tops just to get
more wire in the air and to maybe tune 160m. My total "wire" length of the
upside-down "C" would be about 25-30 feet.

I suspect that there may be a better/lower take-off angle but also that I
may incur some marked directionality. If it has a marked directionality I
could maybe use it only when parked/mobile....

Any thoughts about this scheme?

Anyone try this before? Modeled it?

David
w7dbh