Real world testing - Aramids / kevlar

Hi all,
I’m in the process (pulled the first part a few days ago) of making a few sill protectors for a good friends rally car. The sills were getting hammed by rocks & stones, and needed some form of protection.

I’m interested to hear peoples veiws on any realife experience using aramids in a similar manner.

The laminate is made up of 1x200gsm e-glass, 2x180gsm aramids, 2x200gsm e-glass.

The last two layers of glass are “sacrificial” layers, that will take the main wear & tear, and then fresh layers of glass placed over the top when required.

Whilst it doesn’t need to be “strong”, it will sit flush with the sill of the car, giving it the structural support. it’s not design to prevent sill damage from say a hit with a tree!

If i was building a sump guard, there would be many more layers, and ribbing etc.

Have i possibly built this to light on? Can seem to find any links in the www about real life experiences.

Of course, i’ll find out soon enough once it’s on the car, but hoping to learn more before then…

Cheers, James

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Visuals of the sill protector

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Closest thing I have experience with is brake ducts. I build brake ducts for a local workshop that build dedicated race cars, V8 Supercars and the likes, and the things are virtually disposable. One hit and they go in the bin. Of course being a 3-part hollow assembly makes that pretty much a given, and they do mostly cope with the small hits from rocks etc. If they don’t take a hit from a ripple strip or similar then they may last 2 or 3 races before they go in the bin.