[FPSPACE] article on Brazil's space program..
Fri, 27 Jun 2003 10:12:12 -0700
I believe that the 'data' that the SS-18 is an upgrade of the SS-9 is rather
(possibly deliberate) misinformation. The only real commonality between the
missile systems is that they are roughly the same size, and thus fit in the
Among the differing systems:
a) completely different post-boost stages
b) different engines with different thrust and ISP levels
c) propellants (nitric acid vs N2O4 oxidizer)
d) guidance systems (the SS-18 has a 3 stage avionics package, the SS-9 can
launch in 2 stage configuration)
These missiles were constructed on entirely different assembly lines.
I believe that the difference between the missiles is similar to the Titan
I - Titan II history.
----- Original Message -----
From: "Allen Thomson" <email@example.com>
Sent: Friday, June 27, 2003 6:20 AM
Subject: Re: [FPSPACE] article on Brazil's space program..
> > The SS-9 and SS-18 missiles are completely different systems, despite
> R-36 designation.
> The SS-9 (R-36) and SS-18 (R-36M) are in the same line of development at
> Yangel/Utkin design bureau that started with the SS-7 (R-16). They use
> similar technologies and it's reasonable to regard each as a bigger/better
> successor of the previous one. In particular,
> http://www.fas.org/nuke/guide/russia/icbm/r-36m.htm notes, "The R-36M
> (15A14) was a two-stage missile capable of carrying several different
> warheads. The basic design is similar to the R-36 missile modified to
> include advanced technologies and more powerful engines."
> >From http://www.fas.org/nuke/guide/russia/icbm/ (Other sources give
> different numbers, various type modifications change weight and length a
> bit.) See also http://www.russianspaceweb.com/r16.html ,
> http://www.russianspaceweb.com/r36.html .
> Payload weight Launch weight Length Diameter
> SS-7 - 141t 32m
> SS-9 5.8 183t 32.2m
> SS-18 7.2 210t 33.6m
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