The sound of the rotor blades faded in the distance.
They got to him before the rotor blade hit his arm.
But many said that before the craft fell, its three rotor blades shot off.
There was enough room behind the main rotor blades to accomplish that.
The right rotor blade hit ground and the plane flipped over, he said.
He strained his ears for the sound of rotor blades.
It could not shoot up without hitting the rotor blades.
"how many hours do you have on the rotor blade?"
"First, I want to have a closer look at those rotor blades."
Both came from his helicopter, just below its rotor blades.
One must've hit a fan blade before it sang away.
The fan blades from the engine are several feet long.
Problems with the fan blades delayed testing this summer for about six weeks.
The pressure ratio of a single fan blade is too low and cannot be used.
The fan blades, I assume, are about 1/2 foot in size.
The nearest wall should be at least 24 inches from the ends of the fan blades.
He turned his attention back to the churning fan blades.
Instead of moving quickly, the fan blades moved very slowly.
Right now all I care about is whether you can slow these bloody fan blades down enough for us to get past them.
Next, place the fan blades on a table to make sure they are flat.
