I have a Dx-3 sharp image drone and it has withstood many of my crashes... My friend and I were messing around and he managed to throw a blanked over the drone so it would fall, when I took the blanket off and tried to fly it all but one propeller worked. It spun but very slowly even at max speed. I tried replacing the propeller but it's still not working and when I try and fly it the drone propeller makes a revving sound (it sounds like it's hitting the protector but it's not) hope someone can help me before the weekend is over. Thanks!