lml@lancaironline.net Mailing List Archive

John,

not sure what you mean about faring the cowl. Braly did extensive work on cooling for a IVP and determined that you want a slot between the oil cooler and the cylinder with guides at the bottom to insure air flows through the fins at the bottom rear of the cylinder. If I remember correctly that cylinder is just like #5 in that the fin depth goes to zero so that the barrel actually stops the air from going through. Requires reworking that section of baffle. Works great for me. Look up cooling mods in the archive.

Colyn

On Apr 14, 2012, at 12:02 AM, John Barrett wrote:

Looking for advice for this problem. Oil cooler door may help a little but the trade off of oil temp increase vs CHT increase is a trap at high power climb and in slow flight. Two hours of flight time and problem is consistent up to about 8,000 or 9,000 ft. One idea suggested is to fair the inside top of the intake cowl on the left side because turbulence here will decrease the airflow to the top left side of the engine. One person indicated he did this with a IVP and achieved a 20 degree drop in EGT by doing this.

Anyone else have experience with that?

Thanks in advance and to those who have sent congratulatory emails.

Regards,

John Barrett, CEO

Leading Edge Composites

PO Box 428

Port Hadlock, WA 98339