ISS Crew Heads For Home Stretch | Aero-News Network
Aero-News Network
RSS icon RSS feed
podcast icon MP3 podcast
Subscribe Aero-News e-mail Newsletter Subscribe

Airborne Unlimited -- Recent Daily Episodes

Episode Date

Monday

Tuesday

Wednesday

Thursday

Friday

Airborne On ANN

Airborne 04.20.15

Airborne 04.21.15

Airborne 04.22.15

Airborne 04.23.15

Airborne 04.24.15

Airborne Hi-Def On YouTube

Airborne 04.20.15

Airborne 04.21.15

Airborne 04.22.15

Airborne 04.23.15

Airborne 04.24.15

Mon, Mar 22, 2004

ISS Crew Heads For Home Stretch

Housekeeping, Troubleshooting

Heading into the homestretch of their 6½-month mission aboard the International Space Station, Expedition 8 Commander Michael Foale and Flight Engineer Alexander Kaleri spent the week conducting biomedical experiments and performing maintenance on a key Station component.

Foale and Kaleri spent two days replacing a liquids unit and a water flow system in the Russian Elektron oxygen-generation device in the Zvezda Service Module after weeks of troubleshooting efforts failed to coax it back into service. The Elektron produces oxygen for the Station atmosphere through electrolysis – the separation of hydrogen and oxygen from water that flows through a series of pumps and valves. The hydrogen is vented overboard.

Russian specialists spent several weeks trying to track down the most probable cause for repeated shutdowns of the system after just a few minutes of operation each time. They concluded that particles of potassium hydroxide electrolytes – a by-product of the electrolysis process – that created air bubbles in the liquids unit, resulting in the unit’s repeated shutdowns, were the most probable cause of the problem.

Since last Saturday, the crew has derived oxygen from solid-fuel oxygen generation (SFOG) canisters activated in Zvezda. The crew has been using an average of two SFOGs each day since available air and oxygen were depleted from tanks in the Russian Progress supply vehicle following the first shutdown of the Elektron.

Russian engineers now plan to activate the refurbished Elektron Saturday for a few days of checkouts and diagnosis. If the Elektron repair proves successful, the SFOG canisters will no longer be needed. There is an ample supply of those canisters, as well as oxygen contained in the Quest airlock tanks, that could provide oxygen for the Station for several months.

To accommodate the Elektron repair, a few lower-priority tasks were moved to other days, including routine proficiency training for Foale on the Canadarm2 robotic arm.

On Friday, Foale did a leak check of the window in the Destiny laboratory. In January, a flex hose that helps to vent air from the inner panes of the window was found to be causing a minor pressure decay from the Station. The flex hose was replaced a few weeks ago, and the leak check revealed an airtight system.

Foale and Kaleri took advantage of the recently repaired high-tech treadmill to get in several rounds of intense exercise. A lengthy overhaul last week brought the system back into full operation.

Foale spent some time this week conducting experiments with a cellular biotechnology device to test methods for improved cell culture growth and with a device designed to measure the forces imparted on the joints of the lower extremities and the feet in the absence of gravity.

Foale and Kaleri also took time out from their schedule to answer questions from a syndicated talk show host from the Premiere Radio Networks and from students at the Howard Bishop Middle School in Gainesville (FL).

FMI: http://spaceflight.nasa.gov

Advertisement

More News

Airborne 04.24.15: DA62 Cert, Flt Design's C4, Sporty Transitions, 1st Flt Fight

Also: Legend Cub, Piper Orders, Postal UAVs?, IMC Club 'Brown Jacket Award', X-47B Refueling The Diamond DA62 has received its EASA Type certificate. After a sunny and warm day Wed>[...]

Airborne 04.24.15: DA62 Cert, Flt Design's C4, Sporty Transitions, 1st Flt Fight

Also: Legend Cub, Piper Orders, Postal UAVs?, IMC Club 'Brown Jacket Award', X-47B Refueling The Diamond DA62 has received its EASA Type certificate. After a sunny and warm day Wed>[...]

Airborne 04.23.15: Able Flight, Diesel Archer, RutanRC!

Also: United Bars Security Expert, Airborne Advisors, NTSB Video, Avidyne, Cessna, Airport Access Tempest Plus Marketing Group has announced support for Able Flight as a Platinum L>[...]

ANN's Daily Aero-Linx (04.25.15)

Helicopter History Site This historical evolution of rotary wing aircraft is dedicated to all those that were involved in the development of the most versatile vehicle known by man>[...]

ANN's Daily Aero-Term (04.25.15): Previously Manufactured Aircraft

Existing aircraft-like vehicles meeting the definition of light-sport aircraft that do not meet the provisions of 14 CFR part 103, Ultralight vehicles, and are in a ready-to-fly co>[...]

blog comments powered by Disqus



Advertisement

Advertisement

Podcasts

Advertisement

© 2007 - 2015 Web Development & Design by Pauli Systems, LC