Test Pilot
February 1, 2008
By Barry Schiff
GENERAL What was the only purpose-built night fighter produced by the United States during World War II? From reader Chris Parks: Traffic-pattern and landing-strip indicators usually sprout from segmented circles that contain either a wind T, a tetrahedron, or a windsock. Why are segmented circles used instead of solid circles? The automatic direction finder (ADF) replaced the radio direction finder (RDF).