Page 5 - Aerotech News and Review, Jan. 6 2017

COCKPIT, from 4 CISBoomDA principal investiga-
tor Ed Haering says the flights were designed to simulate boundaries on the ground, to help pilots practice monitoring the booms, and to keep the booms from impacting potentially populated areas.
“We flew in the High Altitude Supersonic Corridor, which is one place we’re allowed to fly supersoni- cally. The sonic boom carpet width, when you are 30,000 feet up, is about
30-miles wide. So we told him to fly as if the boundaries represent places you can’t boom past, and he flew to get the carpet to the edge of that boundary, but not past it,” Haering said.
The display is able to show the lo- cation of sonic booms based on track- ing the aircraft’s trajectory and alti- tude, and is founded on an algorithm designed by Ken Plotkin of Wyle Laboratories, who died in 2015.
That algorithm is also being used by
two companies, contracted by NASA, to develop similar displays, with more of a predictive element.
Honeywell Aerospace in Phoenix, Arizona, and Rockwell Collins in Ce- dar Rapids, Iowa, are both working in collaboration with NASA’s CIS- BoomDA project to develop displays with predictive capabilities. While the CISBoomDA display in NASA’s F-18 shows the real-time location of sonic booms, the displays being developed
The CISBoomDA display allows the pilot of a supersonic aircraft to monitor the locations of any sonic booms produced, to prevent the aircraft from positioning booms in restricted areas.
NASA photograph by Ken Ulbrich
by Honeywell and Rockwell Collins, using the same algorithm, are looking to see where sonic boom locations would be on the ground, based on a planned flightpath.
“What Rockwell Collins and Hon- eywell are developing actually runs on the same algorithm as our display, but uses a predictive capability to show your booms on a proposed flightpath,” said Haering. “The pilot can adjust a proposed flightpath to avoid sonic booms in a particular spot, and then lock it in and fly that path.”
The display will ultimately be used to help NASA proceed with super-
sonic research in a way that mini- mizes disturbance on the ground and provides practice with the future of supersonic technology for pilots such as NASA research pilot Nils Larson.
“Flying with the CISBoomDA dis- play was really interesting,” Larson stated. “It was great to have it in the cockpit, and I think it’s a valuable tool for the future. As a matter of fact, I’ve asked to be allowed to start using the display on my proficiency flights, just so I can keep practicing with it.”
NASA photograph by Ken Ulbrich
Flight Test Engineer Jacob Schaefer inspects the Cockpit Interactive Sonic Boom Display Avionics, or CISBoomDA, from the cockpit of his F-18 at NASA’s Armstrong Flight Research Center in Edwards, Calif.
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