While military customers are clearly Sikorsky's aim with the X2 and S-97 programs, the company says the experience gained in their development will lay the groundwork for a commercial variant of the design, which could hit the market in five to seven years after the military version enters production. The big unanswered question is how much more a helicopter based on X2 technologies would cost than, say, a stock S-76. Sikorsky isn't saying, probably because it doesn't yet know. What's clear is the leap won't come cheap. But such a product will make up for the difference in price, it is hoped, by providing better high and hot hover capability, improved maneuverability and agility, less noise and, of course, much faster cruise speeds.