Apollo 7 RCS Fuel Usage

sw34669

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So i'm at 80h in, i've tried to be very careful only using RCS fuel when needed and not using any att hold when entering long periods of inactivity. During RNDV i used a good chunk. I was accurate with all my pre RNDV burns so didnt need to soak up any borked approach.

I have defaulted to the RCS/DAP settings from the inbuilt checklist and am using the keyboard. At 80h I have the following in the fuel tanks A:60.12 B:47.67 C:55.03 D:48.40 all kg

1) Any ideas as to why I have burned through so much fuel have used low rate and max deadband for anything I could.
2) What should have been my total fuel after RNDV
3) How can I turn the SEC PRP tanks on they dont seem to have any effect

Any suggestions would be appreciated :)
 

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rcflyinghokie

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1) Any ideas as to why I have burned through so much fuel have used low rate and max deadband for anything I could.
I will say you currently have minimum deadband in your DAP. But I think your use seems nominal here.

2) What should have been my total fuel after RNDV
See the attached quad data from Apollo 7.

3) How can I turn the SEC PRP tanks on they dont seem to have any effect
When your propellant quantity gets to around half for a quad you will get an SMRCS light, at this point you just recycle the secondary propellant isol valves (see attached.)

But yeah, looks like your consumption was pretty normal for 80 hours, maybe a little more than actual but certainly shouldn't be a problem as most of your major RCS maneuvering (rendezvous) is all complete.
 

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