P30 maneuver help

jgrillo2002

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Hi I needed some help with the P30 maneuver. According to the checklist, it says to input the TIG on the computer. My question is, How do I input it? I already wrote down the PAD readouts
 

indy91

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There are a few basic verbs that get used all the time and are therefore not mentioned very often:

V21: Change value in register R1.
V22: Change value in register R2.
V23: Change value in register R3.
V24: Change value in registers R1 and R2.
V25: Change value in registers R1, R2, R3.

So if you want to use e.g. 123:45:67.89 as your time of ignition then you have to do this:

V37E 30E to start P30
V25E to change all three registers
+00123E (Hours)
+00045E (Minutes)
+06789E (Seconds and centiseconds)

and similarly for the Delta V on the next display in P30.
 

jgrillo2002

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That was seriously a quick response. I appreciate it. Now I am facing the PAD Burn Attitude. is that the Pitch Roll and Yaw as displayed as RAlign, PAlign, and YAlign?
 
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indy91

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No that's angles for a backup alignment with the GDC in case you are loosing the IMU alignment. The burn attitude is R,P,Y on the PAD. The flight plans have an explanation for each type of PAD, here the one for Apollo 11 : https://www.hq.nasa.gov/alsj/a11/a11fltpln_final_reformat.pdf The Maneuver PAD is explained on pages 2-8 to 2-10.
 

jgrillo2002

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so what do I input at the "PAD Burn Attitude"? the R, P, and Y numbers? and what are the Xs for? 0?
 

rcflyinghokie13

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so what do I input at the "PAD Burn Attitude"? the R, P, and Y numbers? and what are the Xs for? 0?
Yep the R P Y values go into R1 R2 and R3.

They are in XXX.XX degrees. If you have whole numbers then you will leave the last 2 values zero in the DSKY
 

jgrillo2002

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so according to the PAD.
I have R at 000, P at 213, and Y at 357, and this was from the PAD that I wrote down on a sheet of paper.
So, I input in the AGC as follows
00000
21300
35700

Correct?
 

rcflyinghokie13

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so according to the PAD.
I have R at 000, P at 213, and Y at 357, and this was from the PAD that I wrote down on a sheet of paper.
So, I input in the AGC as follows
00000
21300
35700

Correct?
Exactly...dont forget the + signs!
+00000
+21300
+35700
 

jgrillo2002

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Excellent. Now im getting in the checklist "F 50 18 Request MNVR to FDAI RPY Angles. I recognize that the AGC is flashing Verb 50 Noun 18. but I dont get the other part.
 

Thespacer

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Request MNVR to FDAI RPY Angles
That is an explanation of what “F 50 18” actually means in plain language. Breaking it down even further, a flashing (“F”) Verb 50 means “please perform.” Noun 18 is the FDAI RPY angles for the auto manoeuvre.

Pressing PRO while there Is a F 50 18, and while CMC is in AUTO, will cause the spacecraft to manoeuvre to the desired RPY. Verb 06 Noun 18 will display during the manoeuvre. Hitting Verb 62 during the manoeuvre (or before) will display the error needles, and they will be centred when the manoeuvre is complete, at which time you will get another F 50 18. At that time you can either press PRO again, which will cause the “trim“ manoeuvre, basically a fine adjustment. Alternatively, press ENTER to bypass the trim process.
 
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