another SFOG dud today -- what is WRONG with them?

another SFOG dud today -- what is WRONG with them?

JimO: Here's the 'rest of the math' (see below). At the current failure
rate, twice the predicted one,
the remaining SFOGs will last until June 24. The next Progress and its
bottled oxygen and new SFOGs
is due to dock on June 18. That's an adequate margin, especially since the
cabin can go 7-10 days
without any oxygen replenishment and still be safe. And there's the Quest
tank, too. No 'crisis' -- but
one heck of a pack of carnivorous ankle-biters!

What Russian organization manufactures these units?

-------------
May 31 on-orbit status report (courtesy spaceref.com)

Update on Solid-Fuel Oxygen Generator (SFOG) candles: Three more SFOGs
(Russian: TGK) were used today, with one failing to ignite. As of tonight, a
total of 17 candles of the old set have been decomposed on board since 5/20
(total attempts: 27 [i.e., 10 failures = 37% failure rate, instead of
expected 20%]). With the actual failure rate, TGKs currently on board last
for 24 days. Progress 18 (arrival 6/18) is manifested to deliver 42 "new"
SFOGs (zero failure rate) plus 110 kg (242 lbs) of O2.

On 2005-05-31, Jim Oberg wrote:

the remaining SFOGs will last until June 24. The next Progress and its
bottled oxygen and new SFOGs is due to dock on June 18.

Hmm. 110kg of "real" oxygen on the Progress - how much is that in terms
of days-usage?

--
-Andrew Gray

"Jim Oberg" wrote:

another SFOG dud today -- what is WRONG with them?

JimO: Here's the 'rest of the math' (see below). At the current failure
rate, twice the predicted one, the remaining SFOGs will last until June 24.
The next Progress and its bottled oxygen and new SFOGs is due to dock on
June 18. That's an adequate margin, especially since the cabin can go 7-10
days without any oxygen replenishment and still be safe. And there's the Quest
tank, too. No 'crisis' -- but one heck of a pack of carnivorous ankle-biters!

What Russian organization manufactures these units?

The Moscow All-Singing All-Dancing Academy of Medium Machine Building.

D.
--
Touch-twice life. Eat. Drink. Laugh.

-Resolved: To be more temperate in my postings.
Oct 5th, 2004 JDL

This is the best answer I've gotten so far!

"Derek Lyons" wrote in
"Jim Oberg" wrote:
What Russian organization manufactures these units?

The Moscow All-Singing All-Dancing Academy of Medium Machine Building.

D.