My imagination work

I've read about that super sonic air craft that travel in the air faces a problem of having the nose melt down. Simply the air that the nose needed to break will heat up and polish or grind the hardest material available.

This is what I have in mind. Instead of letting this needle shape nose burnt down like a cigarette, substitute it with something like the writing tip of a ball pen. The ball will roll to let the air resistant slip, the ink will cool it down or even rebuff the ball. For the grinding part, ball shape is pretty hard to be grind.

Excuse me, I'm just putting down thoughts, therefore this post is ultra boring. It might get the chance of being rewritten later, GE.