Chip Erwin is one of many who are trying to find less expensive ways for people to experience personal aviation. His company, Aeromarine LSA, fields a range of small aircraft, but he has taken a turn toward the lighter end of the market with his latest offerings. We wrote last month about his dinner presentation at the ninth annual Electric Aircraft Symposium and this month he’s followed up on several of the craft he discussed that night. His web site explains the different rules and regulations that govern small aircraft. Many rules are not yet established (electric motors in U. S. light sport aircraft, for instance). The second segment of the “About Us” section of Aeromarine’s web site describes each of four different sets of regulations – a collection that must stress aircraft designers working on small, light aircraft. Four major rules guide how ultralight aircraft may be flown. FAR Part 103, the guiding light for ultralight designers and pilots …