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NACA duct as 'Exaust' ??

NACA duct as 'Exaust' ??

(OP)
http://home.hiwaay.net/~langford/nacaducts/

Scroll down to near the bottom of the page. (the aircraft is upside down)

Is there any validity to the use of these submerged ducts (installed 'backwards') as vents, or exits for cooling air, such as an oil cooler? Or exhaust augmenters as these appear to be?  

RE: NACA duct as 'Exaust' ??

Not sure it's quite the same thing but managing exhaust/cooling air flow to add 'thrust' was common on WWII aircraft.

The Mustang was perhaps the most significant application of this.

Not quite sure it's exactly the same thing as this situation.

Posting guidelines FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm? (probably not aimed specifically at you)
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?

RE: NACA duct as 'Exaust' ??

thruthefence,
The maker of the vents Makes the comment that even he did not think they would work as designed.
There is a closed thread on here thread1-61524: Vent Design which comes to somewhat the same conclusion.
B.E.

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