Saturday, December 23, 2017 by Zoey Sky
Scientists from The Ohio State University are collaborating with the Federal Aviation Administration (FAA) to assess the dangers posed by “drones that share airspace with planes.” The collaboration is part of a multi-institution study on unmanned aerial systems.
In November, a research team from the Alliance for System Safety of UAS through Research Excellence (ASSURE) published a report which revealed that “drone collisions with large manned aircraft can cause more structural damage than birds of the same weight for a given impact speed.” For the report, ASSURE utilized two different types of drones on two types of aircraft via computer modeling and physical validation testing.
The FAA will base its upcoming operational and collision risk mitigation requirements for drones on the results of the report. Kiran D’Souza, an assistant professor of mechanical and aerospace engineering at Ohio State, led the engine ingestion portion of the unique study. (Related: Spy drones in widespread use across USA, targeting Americans, secret documents now reveal.)
D’Souza warned, “Even small unmanned aircraft systems can do significant damage to engines.” According to the study, reports of close calls among drones and airliners have skyrocketed. Per the FAA, there are over 100 sightings of drones monthly and they are always a potential risk for aircraft, especially when drones are “operating too close to airports.” At least 2.3 million drones are going to be purchased “for recreational use” in 2017, and this figure will undoubtedly increase as the years go by, advised the FAA.
Whereas birds have “soft mass and tissue,” drones are often made from sturdy materials. The testing proved that the more solid materials used to build drones, like its motor, battery, and payload, are often the cause of great damage to an aircraft’s body and engine.
Gerardo Olivares, director of Wichita State University’s National Institute for Aviation Research, also led the team that looked into “the potential impacts of drones weighing 2.7 to 8 pounds” on two kinds of aircraft: a single-aisle commercial transport jet and a business jet.
D’Souza, who is also an expert in gas turbine dynamics, devised computer simulations that gauged the potential damage of a drone “entering a generic mid-sized business jet engine.” The simulations also measured damage to fan blades, the nacelle, and the nosecone.
The results of the simulations indicate that “the greatest damage and risk” happens during takeoff because the fan operates at the highest speed during this phase of flight. The location of the drone’s contact on the fan is a significant factor, and most of the damage happens during impact near the blade tip.
D’Souza shared that the next step is “the development of a representative commercial jet engine model for ingestion simulations,” along with full-scale testing to determine and confirm the simulations. The team will study engine ingestion further together engine manufacturers, along with “additional airborne collision studies with helicopters and general aviation aircraft.”
The scientists warned that drone manufacturers must consider incorporating “detect and avoid” or “geo-fencing” features in drones to minimize collisions with other aircraft.
Drones are more commonly used today, but that doesn’t mean that they are 100 percent safe to use. If you own a drone, do follow these tips to operate it safely:
You can read articles about how to use technology wisely at FutureScienceNews.com.