This has some calculations showing the speed of a swallow: http://www.style.org/unladenswallow/ http://www.style.org/unladenswallow/ The speed calculations ar

This has some calculations showing the speed of a swallow: http://www.style.org/unladenswallow/ http://www.style.org/unladenswallow/ The speed calculations are based on the Strouhal number http://www.style.org/strouhalflight/ http://www.style.org/strouhalflight/ http://www.style.org/unladenswallow/theories/ http://www.style.org/unladenswallow/theories/