Recent content by Metalog

This type and failure does not cause any major problems, if you are going to remove the defect that has formed, be careful not to leave any sharp corners on the propeller, as fatigue cracks can spread from this failure.

The failure in my Anafi occurred with 14 hours of flight. The propellers were original. I replaced it with new propellers, also original, and I intend to change them with 10 hours of use

I had a similar problem, see these conversations: Metalog

The cracks position was exactly as you described. The propellers were original, they came with the drone. 134 flights were made with a total of 14 hours and 44 minutes. The smallest of the cracks had covered more than half the height of the tube.Based on these numbers, I assume that the...

Never point a laser beam directly at the eyes. I took this photo with the stereomicroscope, held the laser in one hand and the piece in the other. I kept rotating the propeller tube until I found the best position to see the crack. All the cracks I found were in the same position, so after...

I found another way to detect the fatigue cracks in the propellers. Using a blue laser. The laser light passes through the propeller material and is interrupted when there is a crack.

274/5000 The photos were taken in a stereomicroscope, with incident light. Then I realized that the cracks, in non-fractured parts, are very visible using a light through the helix tube, like the cell phone light. With this lighting I found cracks in two more propellers.

Apparently the cracks did not appear in pre-existing flaws in the propellers, they appeared in the corner of the hole, two of them, in the propellers not yet fractured, on the opposite side of the propeller blade. In the fractured propeller, the crack started at about 90 degrees from the blade...

I work with failure analysis. My anafi fell, (luckily less than 4 meters high) two propellers broke, nothing more. I analyzed one of the fractured propellers, the only one I found, and found that I had a fracture caused by a fatigue mechanism. I inspected the other 6 propellers, not yet...

Done, the first one in Brazil

Hello, my name is Airton, I'm from São Paulo, Brazil. I have a Parro Anafi. I am a specialist in failure analysis. I have worked for almost 40 years in this area, analyzing failures in airplanes, automobiles, trains and industrial equipment. It has a company that provides consulting services and...