Re: BBQ Roll question...

On Mon, 20 Feb 2006 15:42:32 -0000, "Brian Lawrence"
<Brian_W_LawrenceREMTHIS@xxxxxxx> wrote:

"OM" <om@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

...Here's one that hit me this evening, and I'm surprised none of us
have ever asked this before: When the CSM stack was put into the
Passive Thermal Roll - or BBQ Roll - was it done clockwise or
counter-clockwise? And was there a preference, and if so, why?

Supplement 2 to the Apollo 8 Mission Report

http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19740072935_1974072935.pdf

has a section on PTC starting on page 82 of the PDF file (page 6-1 of the original
doc.).

"PTC roll rate was introduced by five minus roll axis firings between GET
11:13:38 and 11:13:40."

"Minus roll" would be to the left or anticlockwise I believe?

....Yep, but the questions of why and was this SOP still remain.

OM
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Relevant Pages

  • Re: BBQ Roll question...
    ... Passive Thermal Roll - or BBQ Roll - was it done clockwise or ... "PTC roll rate was introduced by five minus roll axis firings between GET ...
    (sci.space.history)
  • Re: BBQ Roll question...
    ... Passive Thermal Roll - or BBQ Roll - was it done clockwise or ... "Minus roll" would be to the left or anticlockwise I believe? ...
    (sci.space.history)
  • Re: BBQ Roll question...
    ... Passive Thermal Roll - or BBQ Roll - was it done clockwise or ... "Minus roll" would be to the left or anticlockwise I believe? ...
    (sci.space.history)