NBAA Convention News

Flight testing imminent for Sierra Super S-II

 - October 7, 2008, 11:23 AM

The Citation S550-based Sierra Super S-II completed a 36-minute maiden flight September 26 at Sierra’s Uvalde, Texas modification center. The flight demonstrated the “dramatic” improvements of the dual fadec-controlled Williams FJ44-3A engines, the company said.

The aircraft reached 18,000 feet in three minutes and 45 seconds. Sierra CEO and chief test pilot Mark Huffstutler performed a variety of in-flight system checks, including shutdown and restart of each engine, stalls and pressurization checks. “This was a superb first flight,” Huffstutler said. “Everything worked so well, it seemed almost routine. There is no substitute for sheer power–just what this aircraft needed to achieve its full potential.”

A second flight on October 1 lasted 2.9 hours and achieved a 43,000-foot cruising altitude and 400-knot true airspeed. The company said the modified Super S-II demonstrated “surprisingly low fuel consumption.” The aircraft landed with fuel tanks still more than half full.

The FJ44-powered Super S-II “provides a stunning improvement in across-the-board performance,” the company said. Sierra plans to begin flight testing following the airplane’s return from the convention this week. It is currently on display at the Orlando Executive Airport.

June 2017
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