On Fri, 2003-10-03 at 09:56, Randall Clague wrote:
> I'm missing something. What does burn time have to do with
> dispersion? Unless most of the dispersion is caused by the engine,
> you'll have the same gravity turn regardless of whether more or less
> of it is powered; the energy is the same. In fact, energy of a short
> burn vehicle is more than that of a long burn; it burns out lower and
> has to coast higher.
Long burn time passively guided rockets have a tendency to do rather
extreme gravity turn maneuvers that result in lots and lots of
horizontal velocity at burnout. Hence, the slant range and dispersion
are greater.
-p
--
No science without fancy, no art without facts.
-Vladimir Nabokov
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