CREATE TABLE table_48194 ("Test flight" TEXT, "Date" TEXT, "Speed" TEXT, "Altitude" TEXT, "Crew" TEXT, "Duration" TEXT, "Comment" TEXT)

What it Duration, when Test Flight is Free Flight #3?
SELECT "Duration" FROM table_48194 WHERE "Test flight" = 'free flight #3'
SELECT "Duration" FROM "table_48194" WHERE "Test flight" = 'free flight #3'