, and of liquid oxygen at . Total empty weight of the system was . When filled with cryogens, the system weight was approximately 7,000 pounds (3.2 t). Use Oxygen and hydrogen were supplied to the orbiter's three electrical power generating fuel cells, where they were converted into sufficient electrical energy to support the average 4 family-member house for approximately 6 months. About 3,000 pounds of pure drinking water was also produced by the fuel cells. Missions with the EDO pallet conducted research on microgravity, Life Sciences, Earth and celestial observations, and human adaptation to the low gravity environment. The following missions used the EDO pallet: {| class="wikitable" ! EDO Flight ! Shuttle ! Mission ! Launch Date ! Duration ! Primary Payload(s) |- |1 |Columbia |STS-50 |June 25, 1992 |13 days, 19 hours, 30 minutes, 4 seconds |United States Microgravity Laboratory-1 |- |2 |Columbia |STS-58 |October 18, 1993 |14 days, 0 hours, 12 minutes, 32 seconds |Spacelab Life Sciences-2 |- |3 |Columbia |STS-62 |March 4, 1994 |13 days, 23 hours, 16 minutes, 41 seconds |United States Microgravity Payload-2 |- |4 |Columbia |STS-65 |July 8, 1994 |14 days, 17 hours, 55 minutes, 1 second |International Microgravity Laboratory-2 |- |5 |Endeavour |STS-67 |March 2, 1995 |16 days, 15 hours, 8 minutes, 48 seconds |ASTRO-2 |- |6 |Columbia |STS-73 |October 20, 1995 |15 days, 21 hours, 53 minutes, 16 seconds |United States Microgravity Laboratory-2 |- |7 |Columbia |STS-75 |February 22, 1996 |15 days, 17 hours, 40 minutes, 22 seconds |Tethered Satellite System-1R (reflight of Tethered Satellite System-1 on STS-46)United States Microgravity Payload-3 |- |8 |Columbia |STS-78 |June 20, 1996 |16 days, 21 hours, 48 minutes, 30 seconds |Life and Microgravity Spacelab |- |9 |Columbia |STS-80 |November 19, 1996 |17 days, 15 hours, 53 minutes, 18 seconds |Wake Shield FacilityORFEUS-SPAS II |- |10 |Columbia |STS-83 |April 4, 1997 |3 days, 23 hours, 13 minutes, 38 seconds |Microgravity Science Laboratory-1 (Mission ended early due to a problem with one of Columbia'''s fuel cells.) |- |11 |Columbia|STS-94 |July 1, 1997 |15 days, 16 hours, 45 minutes, 29 seconds |Microgravity Science Laboratory-1 (reflight of STS-83) |- |12 |Columbia|STS-87 |November 19, 1997 |15 days, 16 hours, 35 minutes, 1 second |United States Microgravity Payload-4SPARTAN-201 |- |13 |Columbia|STS-90 |April 17, 1998 |15 days, 21 hours, 50 minutes, 58 seconds |Neurolab |- |14 |Columbia|STS-107 |January 16, 2003 |15 days, 22 hours, 20 minutes, 32 seconds |SPACEHAB Research Double ModuleFREESTAR,