View Full Version : After VFR pigeons, the airspeed of swallows

12th Feb 2004, 21:45
Estimating the air speed of swallows (http://www.style.org/unladenswallow/?skin=purexml)

Although a definitive answer would of course require further measurements, published species-wide averages of wing length and body mass, initial Strouhal estimates based on those averages and cross-species comparisons, the Lund wind tunnel study of birds flying at a range of speeds, and revised Strouhal numbers based on that study all lead me to estimate that the average cruising airspeed velocity of an unladen European Swallow is roughly 11 meters per second, or 24 miles an hour.

So now you know.

12th Feb 2004, 22:00
And the African Swallow??


Send Clowns
12th Feb 2004, 22:56
What if two are carrying a coconut on a piece of string between their beeks?

Once asked "Alta Vista" (the search engine you could ask in plain language, like Ask Jeeves) for the maximum airspeed of an unladen swallow. It's first answer was "What, African or European?" :D :p Had a link to a Python scripts website. Unfortunately it doesn't do that now.

Biggles Flies Undone
13th Feb 2004, 01:22
Well, you have to know these things when you're a king, you know.

Ascend Charlie
13th Feb 2004, 06:34
Even faster than a Swallow is a Spit...:yuk:

16th Feb 2004, 09:23
The average velocity may be just 20 knots steamchicken, but they can achieve M1.0 in a shallow dive...

16th Feb 2004, 09:48
The swallow..... the bird of love.