use propellers in a sentence.
I think they call these propellers ;)
Human powered planes already exist, using propellers.
The propellers site is so similar I halfway wonder if it's a parody of your site.
I like the concept but, can we replace a huge propeller with three or four inline and directionable small propellers for better stability?
Meanwhile, in Rocklin, CA thousands of Propellers (in all eight of their cores) snicker/sob quietly...
It must be because I can't imagine anyone would prefer handmade propellers to industrial manufactured ones.
I would guess that propellers and motors are wear items as well.
The website clearly shows that the wing draws power to use its turbines as propellers when launching the wing.