[sdiy] dare I say - decoupling?

[Peter Grenader]

Well, Mike...a 54-year survey of 26,285 European Swallows captured and
released by the Avian Demography Unit of the University of Capetown finds
that the average adult European swallow has a wing length of 12.2 cm and a
body mass of 20.3 grams.

Because wing beat frequency and wing amplitude both scale with body mass,
and flight kinematic data is available for at least 22 other bird species,
it should be possible to estimate the frequency (f ) and amplitude (A) of
the European Swallow by a comparison with similar species. With those two
numbers, it will be possible to estimate airspeed (U).

Therefore, we can estimate the airspeed of the European Swallow to be
roughly 11 meters per second (15 beats per second * 0.73 meters per beat)/.

hope this helps -

- P



Michael Ruberto wrote:

> Well we know who the decoupling experts are here, and they do shine so
> brightly. At the risk of sounding like the moron I am I must pose 2
> questions to the decoupling kings.
> 
> which is better, decoupling caps from each rail to ground, from rail to
> rail, or both?
> what's the difference?
> 
> what is the air-speed velocity of an unladen swallow?
> 
> thanks in advance oh wise ones ;-)
> 
> M. A. Ruberto
> 
>