[root]

Cute, but in this form it will never be allowed on European streets. If you hit a pedestrian they will smash their head right into the engine block, so it is never going to pass safety standards. Still, the idea is nice, does anyone have any stats on how much weight this safes?

[ovi256]

It would be easy to put on a lightweight, plastic maybe, engine cover. So do not discard the concept, these details can be fixed.

[root]

I definitely do not discard it. Another solution that sprang to mind is that the softness of the hood makes it possible to put some kind of airbag(s) over the engine. Though this probably has a rather complicated set of problems (when to fire it, how to time the firing, can the required volume be inflated in time, etc.).