[FPSPACE] Soyuz hole investigation....latest

Keith Gottschalk kgottschalk at uwc.ac.za
Sat Sep 15 05:16:01 EDT 2018


I would also imagine that if anyone on board the ISS had used a drill
cutting into metal, the grinding, screeching noise would be
overheard by everyone on board, & picked up by the microphones on board.

- Keith.

On Sat, Sep 15, 2018 at 12:02 AM, bart hendrickx <bhen at telenet.be> wrote:

>
> https://tass.ru/kosmos/5564539
>
> According to TASS, Soyuz MS-10 commander Aleksei Ovchinin confirmed to
> reporters today (prior to a pre-flight exam at Star City) that he and
> Sergei Prokopyev will be performing a spacewalk. A date has not yet been
> set.  Last Saturday Ovchinin had already told journalists that one of the
> tasks for the EVA would be to investigate the Soyuz leak. See this RIA
> Novosti report:
> https://ria.ru/science/20180908/1528090322.html
>
> More reports on the leak from RIA Novosti today, all quoting "sources in
> the space industry” (for whatever they’re worth):
>
> https://ria.ru/science/20180914/1528541433.html
>
> The EVA is reportedly scheduled for November-December and a second EVA may
> be added if the cosmonauts cannot finish all the work in a single EVA.
>
> https://ria.ru/science/20180908/1528090322.html
>
> Roscosmos is considering to propose NASA to do a joint Russian-US
> spacewalk "so that international partners would have no reasons to mistrust
> the Russian investigation".
>
> https://ria.ru/science/20180914/1528533828.html
>
> A slight drop in pressure aboard the station was already noticed in the
> two to three days prior to the moment that the crew was alerted, but it was
> below the threshold of 0.5 mmHg considered necessary to take action. It was
> only when the pressure drop rose to 0.8 mmHg that the crew was informed.
> The gradual drop in pressure is not consistent with the crew itself being
> responsible for the leak. "If any of the crew members had drilled the hole,
> on-board sensors would have noticed a sudden drop in pressure", RIA
> Novosti's source said.
>
>
> Bart Hendrickx
>
> Op 14 sep. 2018, om 21:38 heeft Peter Pesavento <pjp961 at svol.net> het
> volgende geschreven:
>
> Again, from our own Anatoly Zak
>
> http://www.russianspaceweb.com/soyuz-ms-09-hole.html#spacewalk
>
>
> A spacewalk may be planned  to be performed to examine the habitable
> module from the outside
>
>
>
> *Spacewalk planned to test Soyuz hole theory*
>
>
> In order to confirm the leading hypothesis that the hole aboard Soyuz
> MS-09 was drilled on the ground, Russian space officials began planning a
> spacewalk on the exterior of the station.
>
> If substantial traces of the sealant can be found on the exterior of the
> spacecraft, they could help to prove the theory that the hole was drilled
> from the inside during the production of the spacecraft, but it was then
> patched up from the exterior side of the spacecraft. The crew found no
> traces of the sealant inside the module, but the endoscope examination
> showed what appeared to be scratches from the drill on the internal side of
> the meteoroid shield.
>
> According to industry sources, the simulations conducted on the ground
> indicated that when a generally available sealant (which can be purchased
> at a regular hardware store), is applied to the hole from the exterior, it
> could hold up to one atmosphere of pressure difference, industry sources
> told RussianSpaceWeb.com <http://russianspaceweb.com/>.
>
> The inspection showed that even with the micrometeoroid shielding
> installed, it might be possible to reach the hole from the exterior of the
> spacecraft. The meteoroid shielding could also help to cover up the
> sealant, which otherwise could be detected during the visual inspection of
> the spacecraft.
>
> If the spacewalk is attempted, the cosmonauts would have to get to the Habitation
> Module <http://www.russianspaceweb.com/soyuz_bo.html>, peel off soft
> thermal layers blanketing the spacecraft and then cut through the meteoroid
> shielding bordering this section of the spacecraft at a distance of around
> 1.5 centimeters from its pressurized hull.
>
> To access the area of the hole on the exterior of the Soyuz, Russian
> officials are developing a spacewalk scenario relying on the available
> Strela boom, GStM, currently stored on the exterior of the Zarya FGB
> <http://www.russianspaceweb.com/iss_fgb.html> module. The telescopic
> device can be used to carry a cosmonaut secured to a special anchor at the
> end of the boom to a location aboard the station otherwise inaccessible to
> spacewalkers due to lack of railings.
>
>
>
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