N5121 - Stemme Gmbh & CO S10-VT Aircraft Registration

N5121 is a Stemme Gmbh & Co S10-VT, a single-engine four-cycle piston aircraft registered to Mountain Stemme LLC in Boulder, CO. The registration certificate was issued on August 26, 2025. The registration is set to expire on August 31, 2032. The aircraft is configured with 2 seats. The aircraft's Mode S transponder code is A66B58 (hex), used for ADS-B identification and flight tracking. N5121 was last tracked by AviatorDB at coordinates 39.9134, -105.1143 on February 6, 2026. The FAA registry record for N5121 was last updated on August 26, 2025. AviatorDB monitors aircraft positions through ADS-B surveillance data and updates records as new position data is received.

The STEMME S-10 Chrysalis revolutionized motor gliding as the world's first high-performance self-launching sailplane with a fully retractable propeller system. First flown on July 6, 1986, it featured a shoulder-mounted three-section wing configuration with T-tail design, seating two pilots side-by-side. With its exceptional 23-meter wingspan and innovative 5-second engine deployment capability, the aircraft achieved world-class soaring performance. Over 160 examples were produced by Stemme GmbH of Germany through 2002. AviatorDB tracks 40 Stemme Gmbh & Co aircraft currently registered in the FAA database. The ICAO type designator for this aircraft model is S10S.

AviatorDB has found no NTSB accident or incident reports involving N5121. AviatorDB cross-references all FAA registration data with NTSB accident and incident reports, providing a comprehensive safety overview for every registered aircraft in the United States.