- Mar 13, 2008
- Upper midwest in a house
Re: New Aircraft design tube fuselage with foam core wing
That's not really how cooling air works. It's not about how much you get, it's about how the air is used. For max cooling you need the differential pressure, or delta P across the cylinders to be as high as possible. I've seen an engine in a fast plane toasted because a piece of baffling was either left out or fell off. Plenty of airflow, however, the air was just sailing through the cowl unrestricted. And lycoming used that little factoid, delta P <x.x to deny the warranty claim.The mass airflow through a clean, fast airplane is going to allow better cooling--is it really unrealistic to expect that it might be about 25% better? Just maybe those 2180cc engines are cooling okay and getting good reliability and longevity--just like hundreds of Sonex, Onex, Sonerei, KR2, etc, etc pilots are saying. And they'll all say close attention to the cowling and carefully using every bit of air that comes in is important to making the engine last.