Re: Flying birds

Date:         24 May 99 01:52:36 
From:         "R W Walker" <>
Organization: Skywalker Pangalactic Holdings
References:   1
Followups:    1
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John Gunnar Enebak <> wrote in article <airliners.1999.486@ohare.Chicago.COM>...
> You fill a cargo plane with 20 tons of birds, and fly 500 knots at
> 10.000 feet with the birds sitting on the floor of the plane.
> Suddenly all the birds start flying around inside the plane. Will the
> plane then loose 20 tons of weight and start a climb?

Oh please. This is so old.

No the airplane doesn't lose weight. The birds are supported by the air in
the cabin, which in turn is supported by the airplane.

Similarly, the earth doesn't get lighter everytime a plane takes off.

Rockets are another matter, because they actuall can leave the atmosphere.
So, to make the plane lighter, you would have to place each bird on a tiny
rocket, open a window, and launch into space. However, this is probably not
a politically correct thing to do.