[NSRCA-discussion] Hot

[John Pavlick]

Yes 'Doctor Science' is correct: cold air is more dense. If it wasn't, a hot
air balloon wouldn't work. All else being equal, you'll find that your
needle will be a couple of clicks richer in the cold weather. Also, because
the air is more dense and you're adding more fuel, you'll make more power.
Kind of like having a "natural" supercharger. You shouldn't see a big
difference in 5-10 degree temperature changes though. Going from 35-40
degrees in the Winter to 75-80 degrees in the Summer is when you notice the
condition. Make sure everything else is OK.
John Pavlick
http://www.idseng.com



 -----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of Daniel J.
Hamlett
Sent: Saturday, May 13, 2006 9:26 PM
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] Hot


  No, the air is more dense in the winter.  Cold air equals more fuel needed
to keep the same air/fuel ratio.  In the summer the air is thinner so you
need to take some fuel away (lean it out) or you will be running very rich.

  Hope that helps

  Dan

  Dist 1

  Ken Thompson wrote:
    Hotter weather, air is more dense, needs more fuel...

    If I remember right :-)
      ----- Original Message -----
      From: Ed Deaver
      To: NSRCA Mailing List
      Sent: Saturday, May 13, 2006 9:09 PM
      Subject: [NSRCA-discussion] Hot


      Hey everyone.  A question just popped in my mind today.

      First off, YS140DZ, on my Prestige, running great and powerful prior
to today. Although the temp has been 70-90.

      Today 95 degrees and idle, as well as transition just all of a sudden
seems to change.  Am aware heat changes everything from flying
characteristics to lift to how an engine can run.

      Soooo, do I lean the idle and top end or have to richen it up some??
Or nothing.

      Just curious on opinions.

      thanx

      ed


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