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Doug,
Sounds like you have similar heating changes during climb to FL190. I have
set a limit of 400 degrees for CHT, so I have never seen the decrease that
follows with higher flight levels. I chicken out first.
I will check my cooling air; any improvement there has to help.
Tomorrow I will be returning from KFXE (Fort Lauderdale, FL) to KAMA
(Amarillo, TX - home town). I'll experiment more during the flight.
John Lasher, BEE, MD
N411WB
Radiology 806-212-5959
-----Original Message-----
From: DOUGLAS W JOHNSON <LANCAIR1@prodigy.net>
To: johnlasher@msn.com <johnlasher@msn.com>
Date: Thursday, October 05, 2000 7:37 PM
Subject: High flight
John: CHT/TIT does indeed rise and peak at about FL190--at 75% power
(31.5"/2500rpm/28GPG) my #5 CHT peaks at about 410-415 degrees in my bird,
then cools down as I pass through FL220--levelling off on real hot days is
not a bad idea, to get more airflow accoss those fins to cool off the jugs
before heading upstairs. I am sure you have already taken the top cowl off
and checked to make sure that ALL the cooling air is directed over the
jugs,
and not escaping through some other holes (even a 1cm hole can bleed off
alot of your cooling air) . Good luck.
doug
Douglas W. Johnson MD, FACR N654DM
8265 Riding Club Road
Jacksonville, FL 32256
(904) 642-6016
LML website: http://www.olsusa.com/Users/Mkaye/maillist.html
LML Builders' Bookstore: http://www.buildersbooks.com/lancair
Please send your photos and drawings to marvkaye@olsusa.com.
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