[AR] Re: Rocket Plume in Vacuum
- From: Henry Spencer <henry@xxxxxxxxxxxxxxx>
- To: arocket@xxxxxxxxxxxxx
- Date: Thu, 17 Oct 2013 23:06:19 -0400 (EDT)
On Thu, 17 Oct 2013, Henry Vanderbilt wrote:
> The four lobes are probably from the guidance system...
> "...During the second and third stage of flight gas is
> injected into the diverging part of the nozzle for flight control."
> Topol is a 3-stage solid fuel rocket; it seems reasonable to assume that
> the gas injection for upper-stage steering is also quadrilateral, for
> guidance electronics compatibility with the first-stage steering system.
> The four lobes visible in the plume are thus likely an artifact of the
> steering system.
Yep, seems plausible, with the injection running continously
(symmetrically) when there are no corrections to be made, so that the
injectant is pretty much depleted at burnout time.
Henry Spencer
henry@xxxxxxxxxxxxxxx
(hspencer@xxxxxxxxxxxxx)
(regexpguy@xxxxxxxxx)
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