Recent content by Miriam

  1. M

    Passive Thermal Control (G&N)

    I haven't found any explanation on this procedure, but from my (rudimentary) knowledge of the DAP, you're sort of spoofing it by entering the desired rate directly into the respective memory locations. Normally this would be done by dedicated routines like KALCMANU (the routine behind V49), but...
  2. M

    Apollo 11 CSI, CDH, Plane Change, TPI: So many questions, so little time.

    Okay, okay, I bow to historical accuracy.:hailprobe::rolleyes:
  3. M

    Apollo 11 CSI, CDH, Plane Change, TPI: So many questions, so little time.

    Argh, now you've been too fast. I just flew a rendezvous again and stumbled over the "Reset ET" lines. I'd suggest to write 'Update ET' instead, as 'reset' is -for me- hitting the reset sw and stop the timer. But you want it to show the correct time to the next maneuver, so 'update' is better.
  4. M

    Apollo 11 CSI, CDH, Plane Change, TPI: So many questions, so little time.

    Docking is a completly passive thing from the LM side, even active att hold isn't allowed. You'd point the LM at CSM, hold that attitude for some minutes to damp the rates and then do V76, just before the CSM starts its translation. The CSM DAP change is indeed odd. It sets the DAP to "CSM+LM...
  5. M

    Apollo 11 CSI, CDH, Plane Change, TPI: So many questions, so little time.

    From my understanding of the LM DAP, V76 selects the minimum impulse mode, i.e. every time the stick is out of detent, the resp. thruster is fired once for the minimal time possible. It also deactivates att hold and auto maneuvers, so that's pretty normal. Maybe you are just confused by the...
  6. M

    A very strange optics issue...

    Set the DRIFT and REFSMMAT flags again: V25N7E, 76E, 40000E,1E (that's DRIFT) V25N7E, 77E, 10000E,1E (that's REFSMMAT) I'm not quite sure, but AFAIK the RCS DAP isn't restart-protected, so you'd have to cycle through V48 once and do a V46E, too. Yes and yes: V36E will cause a restart, after...
  7. M

    Apollo 11 CSI, CDH, Plane Change, TPI: So many questions, so little time.

    Bypassing the automaneuvers saves RCS fuel and time. Otherwise you'd have to go to the maneuver att (RR breaks lock then, of course), execute the maneuver, go back to tracking att, reacquire...the RCS can translate in all 3 axes, so why not make things easier and use that?
  8. M

    A very strange optics issue...

    Right, go through the 'P06 inadvertently selected' stuff, I forgot.😅 But still strange, isn't it? As if P40 doesn't end a task or forgets to deactivate the TVC DAP. Maybe it could help to turn the DAP off and on again: Call V48, set R1 of N46 to 0XXXX, cycle through the rest of the routine (this...
  9. M

    A very strange optics issue...

    When I remember right, I solved the problem by putting the CMC in standby via P06 and power it back up immediately. You could try that, doesn't hurt.
  10. M

    Apollo 11 CSI, CDH, Plane Change, TPI: So many questions, so little time.

    Hm. Again: not good, not bad. I'd burn the PC. That'd be a P30 maneuver, TIG is CDH time -30 mins, dVx and dVz are 0, dVy is Y dot with inverted sign.
  11. M

    Apollo 11 CSI, CDH, Plane Change, TPI: So many questions, so little time.

    Should be. I never get exactly 15 nm, I guess you could achieve that by playing around with the TPI time, but as that is restricted due to lighting conditions...don't bother. That's about 10 mins longer than the flightplan. Hard to say. I had deviations of +/- 5 mins or so, but 10...I'd press...
  12. M

    Apollo 11 CSI, CDH, Plane Change, TPI: So many questions, so little time.

    That has become standard procedure for me after I had my share of those acts of idiocity: verify that TTCA/TRANS -disable (resp. TRANS CONT PWR -off in the CSM) before I key 00E on the F V37 once any thrusting program is finished. On the other hand, once the DSKY blanks and average G starts...
  13. M

    Apollo 12 Checklists

    That's P23's horizon altitude. Houston would gather data from the P23s Dick Gordon did on launch day and derive an improved value for delta H from that. The background is that the edge of earth's atmosphere to space is not a sharp line, but rather fuzzy, and every CMP tended to mark on a...
  14. M

    [NASSP 8][Apollo 7] Realtime simulation attempt preparation

    Actually the only cb that has to be (temporarily!) closed out of the ordinary is the SECS ARM A BAT A cb, because it powers the RCS-CMD switch. The RCS TRNFR switch is powered by the RCS LOGIC cbs. Those are normally closed. Well, at least in the missions we simulate right now. Somewhere down...
  15. M

    Apollo 11 Docked IMU Coarse Align?

    That seems right. Remember, the LM has the axes arranged differently then the CSM: what you'd call yaw in the CSM is roll in the LM, what you'd call roll in the CSM becomes yaw in the LM. That's why the FDAI in the LM has no red zone on the ball itself, but on the outer bezel.
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