On July 15, 1986, Dick Rutan and Yeager completed a test flight off the coast of California, in which they flew for 111 hours and 44 minutes, traveling 11857 miles in twenty circuits between San Luis Obispo and Stewarts Point, California, breaking the previous record held since 28 May 1931 by a Bellanca CH-300 fitted with a Packard DR-980 diesel engine, piloted by Walter Edwin Lees and Frederic Brossy which had set a record by staying aloft for 84 hours and 32 minutes without being refueled.