Mark:

As the air slows down (as the area increases), the **pressure** increases. Increased pressure is what helps the air go through the fins to the area of low pressure below the cylinders. Does that help?

Walter


On Oct 18, 2004, at 8:32 AM, Mark Ravinski wrote:

This science of making a larger volume chamber under the cowling confuses me.
The air in this chamber isn't doing anything useful.  The volume as the air is passing the cylinder cooling fins may be what's important.  If the air expands and cools above the engine but speeds up and heats up as it goes past the cylinders, have we gained anything?
 
As confused as ever
Mark Ravinski
N360KB 1305 hrs.