In this first of a two-part series, Jim Weir builds a low-cost, high-efficiency portable ground-based antenna system that he used to great effect in the recent CAFE 400 (fuel efficiency) race in Northern California. You can do it, too.
An increasing number of pilots are turning to iPad and Android apps for use in the cockpit. Jim Weir takes an in-depth look at one of the more popular ones: ForeFlight.