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Owner listing

S10

1999 Stemme

Stemme S10

1999 · 1,048 hrs · Longmont, CO, USA

Year

1999

Total Time

1,048 hrs

Manufacturer

Stemme

About this aircraft

N5121 (“Fifty-one to one”… the plane’s glide ratio). Serial number 11-023. This immaculate side-by-side self-launching sailplane is equally well suited for thermal, wave, cross-country soaring and self-sufficient soaring safaris. It is an FAA Certified aircraft powered by a 115hp turbocharged four-cylinder Rotax 914F powerplant. Meticulously maintained and always hangered, this Stemme is a true touring motorglider with 1000+ mile range, 31.7-gallon fuel capacity. Maximum powered cruise speed is 140kts, burning about 4 gph. Electrically retracting main landing gear and steerable tailwheel allow for easy ground operations whether at controlled airports or remote gliderports. The Stemme’s robust centerline thrust folding propeller and reliable drive train transitions between powered and soaring flight in only four seconds with negligible drag and no pitch trim change while deploying and retracting. In flight, its 23m/75-foot wingspan delivers high performance while soaring or powered. On the ground, easy wing-folding permits taxiing, tying-down and hangering with a span of only 38 feet. Owned since new by Stemme USA’s founder. Selling to make room for a Stemme S12. Serious inquiries welcome at [email protected].

Specifications

Manufacturer

Stemme

Model

S10

Year Built

1999

Total Time

1,048 hrs

Serial Number

11-023

Registration

N5121

Location

Longmont, CO, USA

Details

Airframe

Airframe Total time
1048.6
Total hours flon in the past 6 months
15

Engine

115hp turbocharged four-cylinder Rotax 914F powerplant powers a carbon fiber driveshaft to a forward gearbox and folding-propeller that stows for unpowered soaring flight.
680 SNEW

Avionics

Flight rules
VFR

Comms equipment

Trig TY91

Navigation equipment

LXNAV 9070 Soaring Computer with integral GPS and moving map display with multiple customizable screen layouts
Oil press/temp, CHT, fuel qty, tach, MP, volts/amps

Interior

Number of seats
2
Additional equipment
Dual-controls
Excellent, Alcantara
Interior Year
2021
Interior Condition Score
8

Exterior

Polyurethane. Extremely smooth glider finish for laminar flow.
Paint Condition Score
9
Paint Year
1999

Additional equipment

Up-to-date avionics and options ideal for soaring: LXNAV 9070 (Gen 4 with HAWK, WiFi, ADS-B, Flap sensor), LXNAV 80mm I80 Vario, LXNAV 80mm ADI, LXNAV 57mm TrafficView, Dual LXNAV remote stick controls, Mechanical Winter Vario, Trig TY91 Comm, Trig TT22 Transponder with ADSB IN/OUT, RH LXNAV 57mm V8 Vario and ASI for co-pilot, Foreflight compatible Sentry ADS-B IN, Custom speaker inhibit, Dual USB power receptacle, Manifold Pressure gauge, Dual Mountain high O2 system, Solar panels, Upgraded SBS 40 Ahr main battery (2025), Ample avionics power for all-day soaring: Primary Panasonic 7 Ahr avionics battery (2024), plus removable Auxiliary Bioenno (2021) 20 Ahr LiFePO4 avionics battery with charger.

Inspection

Annual inspection recently performed June 2025. Complete logbooks since new.
Inspection Expiry
June 1, 2025

Damage history

Small (~1") non-structural puncture and cosmetic repair by certified composite repair shop. Repair is not visible.

Asking price

$185,000

Seller

MA
Marc ArnoldOwner · Longmont, CO, USA · Member since 2025
Email sellerCall (303) 589-2542
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Before you buy

  • Always get a pre-buy inspection from an independent A&P
  • Verify logbooks and AD compliance before wiring funds
  • Never wire money to a seller you haven't spoken with directly

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