Aerospace Videos

Groundwork For Understanding Severe Turbulence (Gust) • Boeing, Wichita, Kansas

The video chronicles a decade‑long Boeing effort to grasp the dangers of low‑level turbulence, from early gust‑boom experiments in the 1950s to a near‑catastrophic B‑52 encounter in 1964. Jack Fong details how initial programs suffered from limited instrumentation and seasonal bias, prompting a shift toward more sophisticated data acquisition as aircraft missions demanded terrain‑following flight at ever‑lower altitudes. Key insights include the stark contrast between early gust‑boom data—restricted to 30‑35 ft/s winds—and modern recordings that capture gusts up to 120 ft/s. After the B‑52 lost its vertical stabilizer, Boeing equipped test aircraft with high‑fidelity accelerometers, gyros, and pressure probes, enabling precise Earth‑reference gust velocity calculations. Subsequent F‑106 flights logged over 90 hours, revealing 350 gusts in the 40‑60 ft/s range and 80 gusts between 60‑120 ft/s, with onset rates exceeding 500 ft/s². Notable moments include the pilot’s emergency response to a nine‑second, 100 ft/s lateral gust that sheared the B‑52’s tail, and the visual documentation of extreme structural deflections captured by gun‑cameras on escort fighters. The data’s richness—spanning multiple terrains, seasons, and aircraft types—underscores turbulence severity far beyond prior forecasts. The implications are clear: without coordinated, season‑spanning testing and advanced miniaturized sensors, aircraft design and low‑altitude tactics remain vulnerable. Boeing urges the military to integrate weather agencies, map turbulence to topography, and develop analytical models that will safeguard future high‑performance platforms.