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02/05 2006 - spⁿ flight tests re-affirm key performance specifications announced at June 2005 program launch
2nd prototype test aircraft to feature at EBACE just prior to entering

Grob Aerospace announced today that its spⁿ light jet has successfully completed testing of major flight envelope parameters. Results validate that the aircraft is meeting key performance specifications announced at program launch during the 2005 Paris Air Show. With a second test prototype set to enter service in July and a third aircraft's entry into service planned for Q1 2007, the Grob spⁿ heads toward to the next stages of testing required for FAA and EASA certification in 2007. The second prototype aircraft is on display for viewing at the Grob exhibit (#578) during the European Business Aviation Convention & Exhibition (EBACE) being held in Geneva from May 3-5, 2006.

Since first flight of the original prototype in July 2005, the emphasis of flight testing has been on performance, systems development, and flight envelope expansion. Some of the most important tests covered so far have been field performance, stalls, icing shapes, flying to 41,000 ft. and maximum speed (Vmo). In each, case Grob has been extremely satisfied with results which have met estimates calculated prior to first flight. A notable achievement is an improved landing distance at maximum weight, which is now reduced by almost ten percent to 2670 ft./814 m. Furthermore, tests confirm that no major modifications to the airframe configuration are required to achieve certification.

Upcoming flight tests for first prototype aircraft include, among others, completion of stall development, further flight envelope expansion out to maximum altitude & dive speeds, and take-off & minimal control speed performance with one engine inoperative.

In parallel, test emphasis also now moves to systems validation where the entry into service of the second prototype in July will allow for testing of production avionics, environmental control, anti-icing, and other systems. Lastly, a fully-equipped pre-production aircraft will enter service at the beginning of 2007 and will be used to complete final certification and reliability testing. It will be fitted with a full interior and major avionics options.

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