Re: Apollo1 vs Apollo2

In article <1133560851.680959.112500@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
Rusty <reuben_barton@xxxxxxxxx> wrote:
>> http://prod.nais.nasa.gov/eps/eps_data/118283-SOL-001-002.doc
>>From the drawings, it appears that the CEV command module has four
>forward facing docking windows, four side windows and one window on the
>side hatch...

Does look that way. Interesting that they think there's no problem in
putting windows on the "windward" side of the capsule. (Because such a
capsule reenters tilted, with one side of the cone surface nominally
parallel to the airflow, that side gets rather hotter than the "lee" side.
Apollo deliberately put the hatch, the windows, and the thrusters on the
lee side.)

>The CEV service module rcs quads seem to have eight rocket
>nozzles each.

For a guess, that's internal redundancy: each quad has two independent
four-thruster systems. (Can't be because they need the extra thrust --
they're developing new thrusters anyway, so they could just make them
bigger.) Seems a bit on the paranoid side.

>The Lunar lander rcs quads seem to have six rocket nozzles each.

If they're doing attitude control during ascent with the RCS, as Apollo
did, roll control (for rotation around the main-engine thrust axis)
generally takes rather less authority than pitch and yaw.
--
spsystems.net is temporarily off the air; | Henry Spencer
mail to henry at zoo.utoronto.ca instead. | henry@xxxxxxxxxxxxx
.

Relevant Pages

  • Re: Apollo1 vs Apollo2
    ... it appears that the CEV command module has four ... >>> forward facing docking windows, four side windows and one window on the ... Or it could be that the proportionately-larger CEV entry module will ... civilian entry shape. ...
    (sci.space.history)
  • Re: Apollo1 vs Apollo2
    ... it appears that the CEV command module has four ... >>forward facing docking windows, four side windows and one window on the ... that side gets rather hotter than the "lee" side. ...
    (sci.space.history)