Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post

diesel_john · 01-23-2008, 10:16 PM

my take on the perforated sheet metal grill is yes it will work but round holes are a very inefficient way to duct in air.
We might pushing a lot of air around all the time when we don't need it.
If we divert all the air with a smooth airfoil and then have an NACA intake duct that opens only as much as we need, it would only induce extra drag when we need lots of air instead of all the time. does that make sense.
note the shape of the intakes on the hood of this red car.

01-23-2008, 10:16 PM	#19 (permalink)
diesel_john MP$ Join Date: Jan 2008 Location: SW Ohio Posts: 595 Thanks: 5 Thanked 19 Times in 14 Posts	my take on the perforated sheet metal grill is yes it will work but round holes are a very inefficient way to duct in air. We might pushing a lot of air around all the time when we don't need it. If we divert all the air with a smooth airfoil and then have an NACA intake duct that opens only as much as we need, it would only induce extra drag when we need lots of air instead of all the time. does that make sense. note the shape of the intakes on the hood of this red car. Attached Thumbnails Last edited by diesel_john; 01-23-2008 at 10:32 PM..