Solara takes off

If you take the main road east out of Moriarty, N.M., turn south at a sign advertising glider rides, and then swing east again past the sailplanes ornamenting a two-runway airport, you will see hangar No. 76, the headquarters of Titan Aerospace. In this cavernous office-cum-workshop, engineers are developing the Solara-a line of solarpowered robotic airplanes capable of staying aloft for years at a time.