The NTSB found that the flight crew would have been unable to perceive any problem with the airplane until the propellerbladeAngle was between 24 and 26 degrees.
NTSB发现机组人员都已无法感知飞机的任何问题，直到螺旋桨叶片角度为24度和26度之间。
2
The three bladed Warp Drive composite propeller was mounted between the two halves of its clamshell hub and the initial bladeAngle was set.