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From: d9bertil@dtek.chalmers.se (Bertil Jonell)
Newsgroups: sci.military,rec.models.rockets
Subject: Re: Secant Ogive
Message-ID: <1991Jun18.074409.14983@amd.com>
Date: 17 Jun 91 15:53:50 GMT
References: <1991Jun13.055308.22899@amd.com> <1991Jun14.080300.20680@amd.com> <1991Jun15.021629.309@amd.com>
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From: d9bertil@dtek.chalmers.se (Bertil Jonell)


weverka@spot.Colorado.EDU (Robert T. Weverka) writes:
>I have considered, but not implemented:
>means of bringing air into the wake region from rocket side wall or nose.

Has been done for artillery projectiles. It's called Base bleed, and
consists of a small, relatively slow burning, powder charge. The gases
from it are expelled from the bottom of the shell and this slight
overpressure will reduce the overall drag of the shell.

-bertil-