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What a Stemme S12 costs, how far it flies, and what it costs to keep

PlaneFox tracks 4 Stemme S12 aircraft for sale and re-reads every one of them from the broker and dealer sites it watches, so the figures below move when the market moves. Every number on this page is measured from those live listings, not taken from a published price guide.

What does a Stemme S12 cost to own?

A Stemme S12 costs about EUR 1,063 a month to run, or about EUR 131 for every flight hour when it is flown 150 hours a year.

More questions about the Stemme S12

How much does a Stemme S12 cost?
Used Stemme S12 prices vary depending on year of manufacture, airframe hours, avionics and overall condition. Browse the current Stemme S12 listings on PlaneFox to see real-time asking prices from European brokers and private sellers.
What is the price range for a used Stemme S12?
Stemme S12 prices depend heavily on year, airframe hours, engine time since overhaul and equipment level. Check the live Stemme S12 listings on PlaneFox to see the current asking-price range from brokers and private sellers.
How many Stemme S12 aircraft are for sale right now?
PlaneFox lists 4 Stemme S12 aircraft for sale right now, gathered from the broker and dealer sites it watches. The count moves through the week as those sources are re-read. Because PlaneFox reads the same listings repeatedly over time, it also shows which have cut their asking price and which have sold.
Where can I find a Stemme S12 for sale?
Every Stemme S12 PlaneFox can see is on this page — 4 of them, gathered from the broker and dealer sites it re-reads continuously. Most are listed in France (2), followed by Germany (1). Each listing links straight through to the seller, so a Stemme S12 in another country is worth considering rather than filtering out.
What should I check when buying a used Stemme S12?
On a used Stemme S12, check airframe hours, engine time since overhaul, avionics generation and damage history before anything else. PlaneFox recommends a pre-purchase inspection by an EASA Part-145 shop that knows the type, which typically costs EUR 1,500 to EUR 3,500. Under 1,500 airframe hours is low-time and above 3,500 means budgeting for higher maintenance; most piston engines run a 2,000-hour TBO, so past 1,500 to 1,700 hours since overhaul expect the overhaul within one to three years at EUR 25,000 to EUR 45,000. Read the full logbook history for prop strikes, gear-up landings and structural repair, and confirm ADs and SBs are complied with.

About the Stemme S12

Aircraft overview

The Stemme S12 is a German two-seat, side-by-side touring motor glider developed by Stemme AG as a larger and more capable successor to the long-running Stemme S10 family. The S12 first flew in the mid-2010s and received European certification in 2016. It is a self-launching sailplane with a retractable nose-mounted propeller and a 25 m wing, intended for cross-country soaring, powered touring and high-altitude training. Its importance in the used market comes from combining genuine sailplane efficiency with the independence of a certified touring aircraft.

Performance & specifications

The S12 is powered by a turbocharged Rotax 914 series engine, rated at 115 hp, driving Stemme’s distinctive folding and retractable propeller system. Published figures include a maximum cruise speed of about 140 knots, a range of approximately 930 nautical miles under power and a service ceiling up to 30,000 feet when properly equipped and operated. The 25 m wing gives a glide ratio of about 53:1, placing it well beyond ordinary motor gliders in soaring performance. Maximum takeoff weight is about 1,984 lb, with useful load varying by equipment, avionics and certification standard.

Cabin & avionics

The cockpit seats two occupants side by side under a large canopy, with good outward visibility and a touring-style seating position compared with tandem competition sailplanes. The S12 has retractable landing gear and a cockpit designed for long cross-country legs, with space for oxygen, navigation equipment and light baggage depending on installation. Avionics vary by aircraft, but used examples commonly feature Garmin glass displays such as G3X Touch, Garmin GTN navigation and communication units, transponder with ADS-B where upgraded, engine monitoring and glider-specific soaring computers from suppliers such as LXNAV or similar.

Buying & value

Buyers should focus on propeller retraction system condition, engine history, gearbox and turbocharger maintenance, landing gear rigging, canopy condition, oxygen installation and the status of required service bulletins. Because the S12 is relatively specialized and produced in limited numbers, documentation quality, factory support history and avionics configuration have a strong effect on value. Compared with the Stemme S10, the S12 usually commands a higher price because of its larger wing, newer airframe, higher certified weight and more modern cockpit options. In the used market it sits between advanced self-launching sailplanes and premium touring aircraft, appealing to buyers who need both soaring capability and meaningful powered range.

4 Stemme S12 aircraft are for sale on PlaneFox today.

See all 4 listings