Subject: Re: [baidarka] Paddle?
From: Michael Daly (michaeldaly@rogers.com)
Date: Sat Jan 26 2002 - 12:45:39 EST
From: "Tom Wainright" <wainair@yahoo.com>
> It sounds very simular to how the Concorde gets most of its
> forward thrust from the low pressure developed around the intakes
> of the engines and not from the push of the thrust coming out of
> the exhaust! another interesting fact.
That's a misconception. Jet engine thrust comes from mass exchange
at high velocity - the other, often forgotten half of Newton's
equation: F = ma + v(dm/dt). It is very common for folks to
simplify the explanations of what aircraft do in terms of forces,
however, it's conservation of momentum that really explains things.
Mike
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