ricci2
Second Officer
Flight distance : 61158 ft
Spain
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Wildfyre Posted at 2017-9-5 20:38
Pics attached.
I have to take off and land on gravel or rocks/ loose ground 90% of the time, so this is where the chips are coming in.
Hi,
That looks like a load sheer fracture from the picture, consistent with the laminates being pulled apart.
A strike would fracture across the blade because the laminates run along the prop length in my early props anyway and that tare has had an upward longitudinal force applied similar to the pressure of pushing the air down in a normal design manner. There is no missing part on the point of origin, i.e. start of fracture, there could be a weak lamination when it was in the autoclave if that is how its made or a poor batch of glue. Looking at the lower picture, it looks like a product failure , its difficult without better analysis.
If I had it in the lab I could confirm this, I think DJI should ask to see the dead props just to illuminate a manufacturing issue or not.. The potential for early onset fatigue failure if that is what caused the problem has grave implications for us using the machine commercially and in areas of a sensitive nature, i.e. people and machinery we should take special note because if you have not broken a prop yet the replacement schedule means you will eventually be putting replacement props on.
Is there any chance it could of been a prop strike?
ricci |
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