Re: 707 window thoughts

Date:         24 May 99 01:52:30 
From:         Seth Dillon <>
Organization: MindSpring Enterprises
References:   1 2
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Jim1inDC wrote:
> So it seems that "windows that never were" can be for A/C.  Plugs are usually
> for galleys, lavs and the like.

As Jim noted the missing windows (not plugs) are usually just fwd of
the  wing L/E on Boeing (not former McD/D) aircraft.  The area between
the aft wall of the fwd bag bin and the front spar od the wing center
section is used for the a/c pack plenum and from there the ducts
carrying conditioned air run up the sidewalls to the outlets in the
cabin overhead.  The 727 is unique in that it uses a bunch of small
ducts that run up each side wall and are routed between the former and
the window frame to outlets just below the overhead bins, in addition to
the big center overhead duct which runs the length of the cabin.  The
air for the gasper system (eyeball vents) comes straight from the pack
discharge vent, bypassing the mix chamber (so it is always cold) and
runs through seperate ducts which run along the length of the cabin just
above the window line.  This duct has connections with flexible hoses
running to the PSU's over each seat to provide the passenger with a
source of individually controlled cold air.