REFLECTOR: First Flight for N173RT

[Douglas Holub]

"...run LOP if you have an all egt engine analyzer..."
-----------------------------------------
By "all egt" do you mean a temperature probe on each exhaust pipe? I was going to just have one egt probe and 4 cht probes. Do you need 4 egt probes to determine peak egt?

Doug Holub
  ----- Original Message ----- 
  From: Scott Derrick 
  To: Velocity Aircraft Owners and Builders list 
  Sent: Friday, May 11, 2007 5:01 PM
  Subject: Re: REFLECTOR: First Flight for N173RT


  I'm in complete disagreement with TEC.   One cooler will do fine for a 200HP IO360 if its installed correctly.

  Work on your baffling, run LOP if you have an all egt engine analyzer and you engine will do it.  Make sure your nose oil cooler is tight on the upstream side,  and no obstructions and smooth inside the duct on the down stream side.   If you have room run one oil line up one duct and the return down the other one.  All these items will contribute to good cooling. 

  Bear in mind that if your CHT's are running on the hot side its almost impossible to get your oil temperature down with only one cooler.  But high CHT's are much much worse on your engine and high oil temps.  So you want those CHT's down in the low 300's for normal cruise if possible.

  Scott

  HYTEC45 at aol.com wrote: 
    In a message dated 5/11/2007 6:28:59 A.M. Pacific Standard Time, RDTRENT1 at chartermi.net writes:
      It turns out the vernatherm had not opened to pass oil to the oil coolers
    The vernatherm closes to force the oil to the coolers.  It's not like a auto thermostat.

    IMHO, you will be screwing with the oil temp problem with one cooler, so just put in a second cooler now, and enjoy flying.  I know some have "claimed" to been able to get the front cooler to work on it's own, but unless you can cruise at 185-190, your still hot.  The oil is up to 50 degrees hotter than indicated in some areas of the engine.  Staying just below redline may be O.K. by the book and not make any noticeable difference now, but it does when it comes to TOH and MOH times.
    TEC






----------------------------------------------------------------------------
    See what's free at AOL.com. 
----------------------------------------------------------------------------
_______________________________________________
To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector

Visit the gallery!  www.tvbf.org/gallery
user:pw Check new archives: www.tvbf.org/pipermail
Check old archives: http://www.tvbf.org/archives/velocity/maillist.html

-- 

-

    I worry about my child and the Internet all the time, even though she's too young to have logged on yet. Here's what I worry about. I worry that 10 or 15 years from now, she will come to me and say 'Daddy, where were you when they took freedom of the press away from the Internet?'

    Mike Godwin, Electronic Frontier Foundation 


------------------------------------------------------------------------------


  _______________________________________________
  To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector

  Visit the gallery!  www.tvbf.org/gallery
  user:pw   Check new archives: www.tvbf.org/pipermail
  Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.tvbf.org/mailman/private/reflector/attachments/20070511/460925b1/attachment.htm