Mro On Approach, TCM-3 not required |
Mro On Approach, TCM-3 not required |
Feb 3 2006, 11:06 PM
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Member Group: Members Posts: 134 Joined: 13-March 05 Member No.: 191 |
MRO has shifted from the cruise phase to Approach phase. Apparently, the trajectory is so good that TCM-3 was cancelled. This is good news for the prospects for a long life for MRO supporting future missions. TCM-4 is on Feb 28, and MOI on March 10. Only 5 weeks away!
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Feb 19 2006, 06:35 AM
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#2
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Member Group: Members Posts: 624 Joined: 10-August 05 Member No.: 460 |
Nice collection of details. Hydrazine (HN#NH) has been the fuel-of-choice for vectoring motors since Minuteman, which also uses the helium replacement system (The helium is stored in donuts wrapped around the nozzles, both cooling the nozzles and heating the replacement gas.) A monofuel allows simple valve trains and combustion chambers. Hydrazine is both toxic and corrosive - not surprising, as are most highly reactive chemicals.
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