[FPSPACE] How tightly are the Soyuz modules bolted together?

[John Charles]

In answer to the question I asked yesterday: according to Leroy Chiao
(http://leroychiao.blogspot.com/2008/04/soyuz-entry.html), during
ballistic entry, the Soyuz capsule rolls at 13-18 degrees per second
(i.e., 2.2 to 3 rpm), depending on the specific control mode.
(Apologies if this is posted twice.)

On Sat, Apr 26, 2008 at 10:09 AM, Igor Lissov <lissov-i at yandex.ru> wrote:
> Geert,
>
> > As far as I know Soyuz does not have an option to use manual control of
> > the DM during reentry (as was possible on most US craft) and guidance is
> > always done by controlling the roll-angle, either you make a
> > computer-guided lifting reentry or you set a constant roll and make a
> > ballistic reentry.
>
> It has but I cannot remember anybody used the manual mode ever.
>
> Four descent modes for Soyuz are:
> (1) Automated controlled descent (i.e., computer-controlled entry);
> (2) Manual controlled descent;
> (3) Ballistic descent;
> (4) Reserve ballistic descent.
>
> Of course, ballistic entry is a controlled mode as well, just the
> laws of control are different. Not sure what is the fourth mode.
>
> Igor Lissov
>
>
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-- 
John Charles
Houston, Texas