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Posted for "Larry Klaas" <ldk1@mindspring.com>:

> Why also do the CHT rise so much when going from FL 230 to FL 260 with
everything else keep the same?

In the flight levels I have found that running LOP puts CHT's about 40
degrees lower at the same power settings.  Above FL 200 I have trouble
keeping CHT's below 400 ROP.  LOP also reduces IAS about 10 kts.  Fuel flow
goes down about 6 gph, from 22 to about 16 at 31" and 2400 RPM.  The higher
I go the hotter it runs.

Larry Klaas
Klaas Development, Inc.
9333 E University, Mesa, AZ 85207
Tel: 480-354-7138  Fax: 208-361-5849
Email: ldk1@mindspring.com

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