Image courtesy of: https://martin-baker.com/ejection-seats/
Introduction A previous VibrationData post examined cold dwell fatigue in titanium — the phenomenon in which simply holding a moderate stress for one to two minutes causes far more damage per cycle than the same stress applied and immediately removed. The mechanism is driven by… Read more
Introduction Most engineers have an intuitive feel for fatigue: apply a stress repeatedly, and eventually the material cracks — even if each individual load is well below the static yield strength. Dwell fatigue adds a further, less intuitive twist. Dwell fatigue occurs when a sustained… Read more
At John Wayne Airport (SNA) in Orange County, California, noise abatement on departures is managed through a combination of specialized Noise Abatement Departure Procedures (NADPs), strict regulatory limits, and operational constraints. Because SNA is located in a densely populated, noise-sensitive residential area, the airport enforces… Read more
United Airlines Flight 328 was a scheduled domestic passenger flight from Denver to Honolulu, Hawaii on February 20, 2021. The Boeing 777-200 aircraft operating the route suffered engine failure shortly after takeoff. Video link The failure was “contained” but resulted in a debris field at… Read more
Rolls Royce Engine Blade-off Test Video Link 1 Video Link 2 The engine blade-off test is performed to make sure that the engine can survive a fan. compressor or turbine blade breaking off within the engine, without fragments being ejected through the outside… Read more
LA Times Article, Supersonic passenger jets might make a comeback, more than a decade after the last Concorde flight link Boom Technology Inc. – Tom Irvine
I recently flew as a passenger on a E190 similar to the one in the top image. The landing shock is shown in the bottom image. The data was recorded on a Slam Stick X, sampled at 400 samples/sec. The initial set of peaks have… Read more
Image Courtesy of Justin Kane I recently flew as a passenger on a A330-200 similar to the one in the image. I used a Slam Stick X Vibration Data Logger to measure the landing shock, with the sensor mounted on the cabin floor. The acceleration… Read more
I recently flew as a passenger on a A320 similar to the one in the image. I used a Slam Stick X Vibration Data Logger to measure the landing shock, with the sensor mounted on the cabin floor. The resulting acceleration time history is shown… Read more