I did a graphic this morning on various rad configurations
and their pros and cons.

Here it is. I am open to comments.


Paul Lamar

"Del Johnson, North Point Solutions, Inc" wrote:

What about exploring some concepts using exhaust augmentation to round out
the discussion of cooling configurations.  I'm seriously considering using
it in the Glastar.  Although the Glastar is capable of respectable cruise
speeds it is a STOL plane and has some great slow speed handling
characteristics. I'm looking at exhaust augmentation to meet the cooling
requirements when flying at slower speeds as well as reducing cooling drag
at cruise speeds.  I have a fair amount of room in front of the firewall to
work with (see attached firewall drawing).  I'm just finishing up with
hanging the engine and hope to have a working exhaust augmentation system
ready for static testing early next year.

It looks like there would be room to install part or all of the exhaust
augmentor plumbing under the cowling with the intake at a forward position.
I'm open to any ideas.  I would welcome more discussion on the exhaust
augmentation topic and to hear more from the few builders that are also
considering this option.

Thanks

Del Johnson

Will be interesting to measure the pressures and flow when you 
get it flying. Should work fine at 0-100 MPH speed ranges. The 
effectiveness of an exhaust augmentation, by its very nature, 
is reduced as the aircraft speed increases.

Paul Lamar
 
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