An Idea becomes Reality.

Schempp-Hirth sailplanes with Turbo Sustainer Engine (by Prof. Oehler) are the technically brilliant realization of a concept that has already been recognized by Wolf Hirth as an alternative to self-launching gliders.

Simple to use and preventing mis-operation, fuss-free design, minimizal additional weight and low maintenance - Schempp-Hirth's Turbo sustainer system has been well established in the market for more than 20 years and has found many friends. 

Expand Your Options.

Primarily designed to span areas of weak thermals and avoid landing out, the system vastly expands the possible use of your sailplane. Some examples include the operation after a winch launch, aero tow or even car tow or when entering a wave. This system has also provided the base for many exciting experiences in gliding safaris.

More Possibilities.

For two-seaters, the optional second engine control unit supports operating the engine from the back seat as well as from the front seat. With this option installed, the back seat can be declared as the seat of the responsible pilot, allowing you to fly guests seated in the front seat. 

If needed, all sailplanes equipped with a turbo sustainer engine can be transformed into a simple glider in short time.

 

 

Easy to Engage.

The SOLO two-cylinder two-stroke engine gets extracted by an electrical spindle drive supported by a gas spring. The unique, noise-optimized multi-blade foldable propeller gets started using the windmill effect: You just pull and then let go of the decompression handle as instructed in the display of the engine control unit.

The engine always runs at full power, eliminating the need for a starter, choke or throttle. A 12 V power source is only required for the spindle drive, the fuel pump and the ILEC multi-function control unit.

When done, just switch it off.

Once you have reached the desired altitude, the engine gets stopped and retracted by slowing down the glider and switching the engine off by a simple click. The new Turbo control unit TB06 (two-seaters) or TB05 (single seaters) performs all action without any further user action. The engine gets retracted, ignoring the propeller position, and the propeller blades just fold-in automatically.

 

 

Brief instructions

 

1. Ignition ON

The engine gets extracted and the electrical fuel pump gets activated.

If you forgot to open the fuel cock, you will hear a warning signal and the text "FUEL" will be displayed.

2. Pull decompression handle and accelerate

Airspeed should be between 110 and 120 km/h (60 to 65 kt). Unlike a two-blade propeller, the five-blade propeller easily reaches starting rpm even at low airspeed.

3. Let go of the decompression handle

The display will tell you to let go of the decompression handle once sufficient rpm have been reached.

4. Conduct powered flight

The engine runs at optimal performance. The electrical fuel pump will be switched off automatically after successful engine start.

 

Switch off ignition.  
That's all.

The engine will get powered down and will immediately be retracted to an angle of about 45 degrees. The control unit then waits for the propeller to stop before fully retracting the engine.

 

 

Gallery

Engine Specifications

  • Twin-cylinder in line
  • Two-stroke engine
  • Air-cooling
  • Lubrication by fuel-oil-mixture
  • mixture control via two diaphragm carburetors
  • CDI ignition
  • Crankshaft mounted propeller
  • No engine starter
  • Crank-case-pressure operated fuel pump
Engine displacement 430 ccm
Compression ratio 10 : 1
Ignition unit Magneto SOLO, ignition coil Ducati
Spark plugs Bosch W5 AC, Gap at electrodes 0.5 mm
Carburetor SOLO, metering-device Tillotson or WALBRO
Direction of rotation Counterclockwise, seen in direction of flight
Fuel 2-Stroke-mixture, AVGAS 100LL, premium gas (min. 95 ROZ)
Mixture Mixture ratio 1:40, 2-stroke Castrol mineral oil or synthetic oil, or other oils with specification according to JASO FC or FD
Weight 16.8 kg with muffler and without propeller
Max. cont. speed, -power 5500 rpm with a power of 15.3 kW (20.5 hp)
Max. rpm 6500 rpm
Recommended rpm 5000 rpm
Idle rpm Not available, no throttle control
Cylinder head temperatur max. 275 °C (527 °F) measured under spark plug
Fuel consumption 2.2 US gal./hr. (8.5 l/h)
  • Twin-cylinder in line
  • Two-stroke engine
  • Air-cooling
  • Lubrication by fuel-oil-mixture
  • mixture control via two diaphragm carburetors
  • CDI ignition
  • Propeller mounted on belt drive
  • No engine starter
  • Crank-case-pressure operated fuel pump
Engine displacement 430 ccm
Compression ratio 12 : 1
Ignition unit Magneto SOLO, ignition coil Ducati
Spark plugs Bosch W5 AC, Gap at electrodes 0.5 mm
Carburetor SOLO, metering-device WALBRO
Direction of rotation Counterclockwise, seen in direction of flight
Fuel 2-Stroke-mixture, AVGAS 100LL, premium gas (min. 95 ROZ)
Mixture Mixture ratio 1:40, 2-stroke Castrol mineral oil or synthetic oil, or other oils with specification according to JASO FC or FD
Weight 23.5 kg with muffler and without propeller
reduction ratio 1 : 1.56
Max. cont. speed, -power 6500 rpm with a power of 22 kW (30 hp)
Max. rpm 6600 rpm
Recommended rpm 6250 rpm
Idle rpm Not available, no throttle control
Cylinder head temperatur max. 275 °C (527 °F) measured under spark plug
Fuel consumption 3.7 US gal./hr. (14 l/h)

Models with Turbo Sustainer Engine:


To fly the probably best two-seater glider that has yet been designed doesn't mean that you have to forgo plannable and safe long distance flights. At minimal additional weight, the turbo engine option turns an Arcus into an Arcus T. Should you run out or lift, you can always rely on the turbo engine - as not every glider pilot needs the adventure of a nightly retrieval by trailer. 


The Duo-Discus XL is the perfect device for enjoying flights together, whether in syndicates, in the family or in daily gliding club operation. And with its proven Turbo sustainer system, outlandings become a story of the past.


The combination of the versatility of using a Discus-2cT and the easy usage of its engine  make it the ideal piece of sports equipment for competitions or ambitious cross-country flights, the perfect companion for soaring safaris - or simply the robust favorite glider of any gliding club.


Handling and agility of the Ventus-2cxT have set standards; top positions at championships and the OLC prove its performance. The turbo sustainer system, proven for decades, adds the assurance that the risk of landing out and the burden of long retrieval tours are a story of the past.

The combination of the versatility of using a Ventus-2cxT and the easy usage of its engine make it the ideal piece of sports equipment for competitions or ambitious cross-country flights, the perfect companion for soaring safaris - or simply the robust favorite glider of any gliding club.