This is the pic. That is not acceptable in my opinion. It looks to be 100% unidrectional carbon. I don't have the means to test this but according to my research the strength across the fibers is dependent mostly on the epoxy which is hard and brittle. I did some hack mechanic testing when I was making my carbon seat floor mounts with unidirectional carbon. It is far stiffer longitudinally in the direction of the fibers. The strength across the fiber orientation wasn't there, hit it with a hammer hard enough it would crack. Now if the fiber tows or groups of strands were lined up it might split in half. I had to make the floor mount heavier by alternating fabrics with different fiber orientations every 4 layers.
You can see lines running around the diameter of the shaft - those are simply polyester thread binders to keep the cloth together. There's no strength in those threads. And the yellow line looks like some sort of kevlar or fiberglass? But that thin tape isn't going to do much.
The tube would be fine unless there was some imperfection in one of the fabric layers like a very small air pocket where epoxy pools. I highly doubt that these tubes are x-rayed or somehow tested to a standard. I also doubt that these shafts were over-built because of cost and added weight.
The F8X OEM driveshaft looks like it is wrapped in kevlar to prevent total separation of the driveshaft which could send razor sharp carbon shards everywhere and cause even more damage. I don't know if the yellow tape on the YCM shaft serves a similar purpose?
You can see lines running around the diameter of the shaft - those are simply polyester thread binders to keep the cloth together. There's no strength in those threads. And the yellow line looks like some sort of kevlar or fiberglass? But that thin tape isn't going to do much.
The tube would be fine unless there was some imperfection in one of the fabric layers like a very small air pocket where epoxy pools. I highly doubt that these tubes are x-rayed or somehow tested to a standard. I also doubt that these shafts were over-built because of cost and added weight.
The F8X OEM driveshaft looks like it is wrapped in kevlar to prevent total separation of the driveshaft which could send razor sharp carbon shards everywhere and cause even more damage. I don't know if the yellow tape on the YCM shaft serves a similar purpose?
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