Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Random Aerodynamic Oddity of the Day Thread

Piotrsko · 08-25-2018, 10:31 AM

I have messed with ducted fans before, and didn't notice an efficiency by squaring off the blades. Might be more efficient by leaving them full length, like high aspect ratio aircraft wings. Also On wind turbines, there is a trend towards longer not wider blades.

This is moot if your props are typical boat wide blade ones. My experience is in aircraft.

Actually your reference points towards a flat paddle set up like the motor in a die grinder

08-25-2018, 10:31 AM	#72 (permalink)
Piotrsko Somewhat crazed Join Date: Sep 2013 Location: 1826 miles WSW of Normal Posts: 4,385 Thanks: 532 Thanked 1,196 Times in 1,055 Posts	I have messed with ducted fans before, and didn't notice an efficiency by squaring off the blades. Might be more efficient by leaving them full length, like high aspect ratio aircraft wings. Also On wind turbines, there is a trend towards longer not wider blades. This is moot if your props are typical boat wide blade ones. My experience is in aircraft. Actually your reference points towards a flat paddle set up like the motor in a die grinder __________________ casual notes from the underground:There are some "experts" out there that in reality don't have a clue as to what they are doing.