Innovation area

Hispano-Suiza developper

Since its creation, Safran Transmission Systems has largely proven its ability to develop high-performance products for its customers.

Aircraft have increasingly demanding requirements for higher performance and reliability, coupled with reduced size and weight. To address these concerns, the accessory drivetrain (ADT) is constantly reinvented, using sophisticated computing techniques, new materials and manufacturing processes and innovative new designs to optimize the unit's integration with the engine. 

Safran Transmission Systems deploys the combined human and industrial capabilities needed to meet these challenges. As a fertile seedbed for the technologies underpinning tomorrow's successful products – reflected in our regular patent filings – Safran Transmission Systems plays a vital role in the international aviation industry. 

Our latest achievements

Integrated Generator GearBox

The latest innovation from Safran Transmission Systems is the IGGB®, or Integrated Generator Gearbox, an excellent example of teamwork with the aero-engine major CFM and partnership with GE Aviation System.

In addition to the conventional functions of ADT, this new technology not only handles the usual power transmission function, but also adds power generation, combined if needed with engine starting, by integrating a starter-generator in the limited space offered by the accessory gearbox (AGB). In other words, the IGGB provides weight and space savings, while also enhancing maintainability.

In addition to advantages for the engine-maker, the IGGB also improves the aircraft's overall performance, including reduced fuel consumption, a key advantage for today's airlines. 


Reduction Gearbox

Centre d'essais Safran Transmission Systems

Drawing on our experience with propeller reduction gearboxes for turboprops and our broad expertise in propulsion systems, Safran Transmission Systems has undertaken the development of high-power reduction gearboxes for tomorrow's very-high bypass ratio engines.

For instance, we have drawn up a design and development plan to make gearboxes rated at 20,000 kW or more. They will be located along the engine center-line, between the fan and the turbine driveshaft. Our new test center reflects the joint ambition of Safran and Safran Transmission Systems to develop this new technology in conjunction with engine manufacturer Safran Aircraft Engines. 

Fundamental and applied research

"Vivre des missions clés, inventer votre avenir"

Safran Transmission Systems has long teamed up with major engineering schools, universities and research laboratories to explore new areas of fundamental and applied research.

In conjunction with the INSA Lyon and ECAM engineering schools, for example, we created the "Innovative Aircraft Mechanical Transmissions" Chair in late 2014, clearly establishing our position in support of meeting sustainable development goals in the air transport sector.

This Chair consolidates a partnership that kicked off about 15 years ago with the LaMCoS lab at INSA Lyon and the LabECAM lab at ECAM Lyon.


Safran Transmission Systems, a partner in the Clean Sky 2 research program

Through the European research program Clean Sky 2, Safran Transmission Systems, along with fellow Safran company, is contributing to the development of a turboprop engine for business aircraft. Safran Transmission Systems is in charge of the design, development and testing of a complete system combining reducting gears for both the propeller and accessories, the Propeller and Accessory GearBox (PAGB).

AGB Next-Generation

To maximize efficiency, Safran Transmission Systems works closely with engine manufacturers on Research & Technology (R&T) programs. Together they study new architectures that will facilitate accessory gearbox (AGB) integration for both engine and nacelle manufacturers.

The AGB NG (Next-Generation) is based on a design that allows the tangential mounting of equipment, providing several main advantages. First, it reduces overall size and allows better accessibility and maintainability. Secondly, by placing the AGB closer to the engine, it reduces the nacelle diameter, which in turn decreases drag to reduce fuel consumption. 

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