Since 1986 Harry Weisberger has been a contributor to Aviation International News and a regular member of its HAI and NBAA convention news editorial staff. He was previously a marketing communications specialist for Sperry Flight Systems in Phoenix, providing information involving the general aviation, airline, defense and space market segments. His aviation journalism activity has also included writing and editing for Flight Training, Business Aviation Safety Journal, Private Pilot and Arizona Flyways (for whom he interviewed Barry Goldwater and Paul Tibbets. He has also contributed to Smithsonian Air &amp; Space and Aero magazines. He served 5-1/2 years on active duty with the U.S. Navy as a radar intercept officer in F4 Phantom jet fighters, followed by Naval Air Reserve duty as a patrol plane navigator. Weisberger’s journalism career began at the Santa Ana Register (now Orange County Register) where he was a beat reporter and copy desk editor. He holds a commercial pilot license with instrument rating, has logged 1,980 pilot hours and has owned or been a partner in five general aviation aircraft.

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Harry Weisberger

L-3 Avionics’s Trilogy electronic standby instrument received TSO approval from the FAA for use on Part 27 and Part 29 rotary-wing aircraft, according to the Grand Rapids, Mich.-based company.
The L-3 Trilogy, apparently so named because it makes the holy trinity of attitude, altitude and airspeed available to pilots when all else fails, is on display at L-3’s Heli-Expo booth (No .4829). The Trilogy offers an option to provide heading data using an external flux valve (magnetometer). The panel-mounted Trilogy integrates an air data computer and solid-state attitude sensor with circuitry to process and display the external heading input. The rotorcraft version of the indicator is calibrated from 20 to 350 knots and -1,500 to 55,000 feet and can handle roll rates up to 100 degrees per second. It will be available as original equipment on new helicopters as well as for retrofit.
“The all-in-one glass standby instrument is the first system of its type certified for light helicopter operations,” according to L-3. Larry Riddle, vice president of business development for L-3 Avionics, noted, “Trilogy saves panel space and reduces weight for light helicopter operators. These two significant benefits combined with Trilogy’s solid-state reliability and precision make it an excellent package for this market.”

Trilogy backup offers attitude, altitude, airspeed

L-3 Avionics’s Trilogy electronic standby instrument received TSO approval from the FAA for use on Part 27 and Part 29 rotary-wing aircraft, according to t

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