Ask PG: Hardware/Infrastructure startups and YC?

A number of the ideas I've had for new disruptive companies aren't traditional web applications or services, but instead are hardware producers, new takes on systems software, and re-imagining infrastructure. More SpaceX and NeXT than Hipmonk and Posterous.

These markets are full of slow-moving entrenched players: a ripe target for disruption in a major way. However, it's probably a harder market to get into, with more capital outlay required to get started.

My question is: would YCombinator be interested in such a startup? I imagine that the level of funding YC gives would help a team of founders get a purified idea of what they intend to make, and maybe some very early stage prototypes of software, though probably not hardware. Being successful would entirely depend on getting a funding round once we produce the plans so we can hire talent, purchase materials and start manufacturing.