NACA duct as 'Exaust' ??

thruthefence · Aug 9, 2010

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?

KENAT · Aug 9, 2010

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
http://eng-tips.com/market.cfm?
(probably not aimed specifically at you)
What is Engineering anyway: faq1088-1484

berkshire · Aug 9, 2010

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 which comes to somewhat the same conclusion.
B.E.

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NACA duct as 'Exaust' ??

thruthefence

Aerospace

KENAT

Mechanical

berkshire

New member

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