PPRuNe Forums - View Single Post - Aircraft to fly in formation 1.8 nm apart to save fuel like geese do
Old 21st Nov 2019, 03:18
  #54 (permalink)  
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Join Date: Jun 2009
Location: florida
Age: 81
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Salute!

Tnks for the reminder , TDracer. Ya gotta be close to have help. but you can be a half mile behind a heavy and see some serious roll and such.

We "lights" saw the effects of the wing downwash/upwash/vortex on a daily basis in close formation. Figure ten to fifteen feet or so.

As an experiment on a cross ocean mission I tried to use the vortex of the KC-135 tanker while maintaining nose-tail seperation ( B-70 crash fully on my mind). Sure enough, as I closed from the stern I had to hold left stick , although I was on the starboard side. So I was riding the "wave" like a surfer. Pulled back power a bit and stayed right with the tanker. My fuel flow went down a few hundred pounds per hour. So those geese have figured it out prolly a few hundred thousand years ago, ya think?

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