PirelliPZero
Active Member
For starters, there isn't just one "carbon fiber" construction like there isn't just one metal construction. You can bend a steel spoon with your hands, but you can't bend a steel beam with your hands. You can crush an aluminum can with your hands, but you can't crush an aluminum bumper beam with your hands. Yet they are all properly constructed.Not sure I agree. A goodly portion of my airplane is made from carbon fiber, including the radome with is engineered to withstand the impact of a 5 pound chicken traveling 250 knots, or roughly 285 mph.
I once ran over a flock of Canadian geese going about 150 mph: made one hell of a mess, but the carbon fiber flaps were Un-damaged.
Perhaps car parts aren't constructed the same way, that is to say, properly?
Picture of a radome that was hit by a large bird. Knocked the paint right off of it, but the structure is intact.
So it depends on the job the carbon fiber is designed to do. Presumably as in a plane's fuselage, F1 cars use a carbon fiber tub, also known as a monocoque or safety cell. This has protected drivers through impact forces reaching 75G! Meanwhile F1 cars also use carbon fiber front wings, and pieces of those snap off at the slightest touch of another car. That's because in the latter application the carbon fiber is meant to be as light and thin as possible while being strong enough to its job. (And its job is airflow, not impact absorption.)
Likewise a front lip on a car is meant for aero and not impact. Similar to the way a plastic front bumper cover is only meant to withstand measly <5mph impacts without significant damage. It is the bumper beam behind it that is designed for true impact.
To think of it more simply - something has to give. In your case, it was the bird! But regarding the lower front fascia of a car, the curb isn't going to move. The speed bump isn't going to move. You don't want your car registering an impact and having the airbags go off. No, the lip will give a little, and then it will break.
Then it will just be a more expensive replacement because it is a more expensive material.
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