CENTURY AGO, a group of publishing magnates sponsored the Pulitzer Trophy Race, a 51km closed-course competition designed to headline the National Air Races series and highlight the rapidly developing technology of flight (not to mention sell newspapers). Today, the National Aeronautic Association, the oldest non-profit aviation group in the US, plans to resurrect the contest as a four-day cross-country endurance race for a range of crewed electric-propulsion aircraft; at the same time,