I can tell you about my air density situation trying to get a 747 off a
short runway in Cairo in the middle of summer. Long story, but sucking the
landing gear up at the end of the runway was a little un-nerving.
Hot, dry air is considerably less dense. And at the speeds were running at
Bonneville it makes a difference.
John B
----- Original Message -----
From: "DrMayf" <drmayf@teknett.com>
To: <kturk@ala.net>; "Dick J" <lsr_man@yahoo.com>; <Want1937hd@aol.com>;
<edvs@uswest.net>
Cc: <land-speed@autox.team.net>
Sent: Wednesday, June 27, 2001 1:28 PM
Subject: Re: Slugs
> Don't know squat about salt wetness. But if air is denser then it takes a
> linear amount of horsepower to overcome the increased drag caused by it.
Hot
> air is less dense, reduces lift and drag. Also hot air decreases HP. But
for
> those on juice or pressurized and intercooled, then makes not much
> difference. So if those conditions are met, run at the hottest part of the
> day. For normal aspirated run at mid morning.
>
> And Keith, why does an educated college dude like yourself pretend to be
> dumb? You went to Emory Ridel or somewhere didn't you?
>
> mayf, the rednecked, very ignorant, desert rat, just ask anyone!
>
> >Subject: Re: Slugs
>
>
> >
> > Okay let me see..... Air density is a critical factor in determining
> > Drag... >
> > We have talked about this Many times on the list.... Dave Dahlgren and I
> > were chatting about it yesterday on the phone.... and we found several
> > factors besides air which might attribute the Morning Passes to being
> > slower then the afternoon passes. I'll pitch a couple of theory's out
> and
> > let Mayf give us his hypothesis on them ... ( someday I'll learn what
that
> > word means.... just dont' teach me now I like being ignorant )
> >
> > 1. The Salt is wetter in the morning then it is in the afternoon.? ( I
> > think this is true.... any decenters?
> >
> > a. Wet salt provides worse traction
> > b. Wet salt increases Rolling resistance
> >
> > 2. The air is denser in the morning.
> >
> > a. Dense air increases the drag because there are more slugs per mass
> > volume of air.
> > b. Dense air makes more Hp but not enough to over come the increased
> > drag associated with the dense air.
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