SFWA Organisation and Workplan


The concept of the “smart” low drag wing and the integration of the CROR power plant werestudied in a substantial number of major research and technology programs since decades.

However, the transition into industrial application was never achieved because

Some required contributing technologies were not available or premature

  • Critical technical show stoppers were identified in the R&T projects
  • The risk for application without large scale validation and demonstration underrealistic operational condition was unacceptable.
  • The programmatic “environment” for an appropriate, huge demonstrator project wasnot available

The work break down structure of the CleanSky SFWA-ITD is tailored to overcome thesedeficits. The logic of the work packages is aligned straight forward along the concept ofdeveloping, integrating, and validating the technologies along increasing the Technology

Readiness Levels (TRL):


SFWA 1 – Technology Development

In Work Package 1 “Technology Development” all key elements of technologies required to develop, design and build an all new smart laminar “low drag” wing, are picked up at typical “laboratory levels” TRL 2 or TRL 3, to be advanced to a TRL 4. This relates to a development at subcomponent or system level with features and performance validated at realistic condition in a rig tests. This does not only apply to hardware, but include aerodynamic and structural design and calculation methods, fabrication or repair tools.

In SFWA-ITD the headlines for these WP1 technologies are:

  • Passive and active technologies for flow control
  • Concepts for active and passive load control
  • Sensor and actuator network architectures
  • Concepts for laminar wing high lift design
  • Tools and methods for laminar wing pre-design

Please note that work package 1 does only contain technologies related to the smart wing.

The activities to integrate the innovative power plants consider the availability of all basic technology elements at TRL4, which means the related R&T work starts in SFWA work package 2.

SFWA2 – New Configuration

In Work Package 2 “New Configuration” the integration of the smart wing, respectively the innovative power plants as major components takes place, including the preparatory R&T to integrate the major parts into the overall aircraft concept. For the smart wing a number of dedicated “feature” ground and rig demonstrators are planned to mature and validate the new wing with respect to bird and lightning strike, icing, but also with manufacturing and repair methods of related innovative structures and systems.

For the engine integration there will be two path ways to consider the special requirements for business jets respectively large transport aircraft. In work package 2 all activities related to the integration of laminar wing technologies and integration of innovative power plants including the design of a modified, innovative empennage are addressed, advancing the SFWA technologies from TRL4 to TRL5.

To be able to accommodate further important complementary technologies in addition to the smart wing and innovative engine integration, a work package “Integration of other Components for Green Operation” is added in SFWA WP 2. The detailed assessment of the value and potentials of the individual SFWA technologies at component and aircraft level are also part of work package 2. This work package is also acting as interface to the CleanSky Technology Evaluator, providing the reference aircrafts, the conceptual aircraft, and the related models for the parametric assessment of the SFWA results.

SFWA3- Flight Demonstration

Work Package 3 “Flight Demonstration” accommodates the flight demonstration activities to validate and demonstrate the SFWA target technologies under real operational condition in an aircraft environment at large or even full size. These demonstrators are providing the key information to advance the SFWA-technologies from TRL5 to TRL6. The flight demonstrators in SFWA are: High Speed Smart Wing Flight Demonstrator

  1. Low Speed Smart Wing Flight Demonstrator
  2. Innovative Engine Demonstrator Flying Test Bed (“CROR engine - demo FTB”)
  3. Long Term Technology Flight Demonstrator
  4. Innovative Empennage Demonstrator
  5. Advanced Lip Extended Acoustic Panel” Demonstrator

SFWA Aircraft Concepts

Another key element of the technical management in SFWA is provided by the “SFWA-ITD

Aircraft Concepts”. Introduced in 2009 and established in year 2010, they provide the aircraft environments required for the different technology streams to develop, mature, and move the technologies forward to increasing TRL´s.

The setup and choice of these concepts assure that the SFWA-ITD covers all the various technologies as required by different types of aircraft. SFWA aircraft concepts represent flight demonstrators but also paper studies, which enable to mature technologies to a high TRL through putting them into a “virtual” overall aircraft environment. Note that the major SFWAITD flight demonstrators are “SFWA-ITD Aircraft Concepts” as well.

  • High Speed Demonstrator Passive (HSDP)
  •  Low Speed Demonstrator (LSD)
  • Short Range Aircraft Concept (SRA)
  • Low Sweep Bizjet Concept (LSBJ)
  • High Speed Demonstrator Active (HSDA)
  • Long Range Aircraft Concept (LRA)
  • High Sweep Bizjet Concept (HSBJ)
  • CROR Engine Demo FTB

As the ultimate target of SFWA is to mature the selected key technologies from TRL 3 to TRL 6, the development, integration and demonstration of these technologies at large scale under operational conditions will provide an important, partial element of the required proof of maturity.

The aircraft concepts provide their activities according to the overall backbone planning of the technology streams.

SFWA Technology Streams

In order to improve the technical coherence and alignment in SFWA towards the ultimate goal, which is to mature the SFWA key technologies toward a readiness level of 6, an additional layer of “SFWA-ITD Technology Streams” has been established in 2010. The Technology Streams are defining the technology roadmaps for the respective technologies which serve as pacemakers for the work packages. In other words, the technology streams are the “internal customer” of SFWA, providing the guiding master plans and the technical requests to the work packages.

The objective of the Technology Streams is to advance the key technologies towards a TRL of 6 (in some cases 5) within the life time of CleanSky, by providing all relevant milestones, reviews, gates as part of the master plan.

Following an iterative process with the SFWA-ITD members, the list of technology streams was frozen in mid-2010 as follows:

  • Natural Laminar Flow Smart Wing (NLF SW)
  • Hybrid Laminar Flow Smart Wing (HLF SW)
  • Innovative Control Surfaces (ICS)
  • Fluidic Control Surfaces (FCS)
  • Load Control Functions and Architectures (LCFA)
  • Buffet Control (BC)
  • CROR engine integration (CROR-EI)
  • Integration of Innovative Turbofan Engines to Bizjets (IITE)
  • Advanced Flight Test Instrumentation (FTI)

The technology roadmaps of the technology streams were defined in the second half of 2010 by senior engineers. The activities required for achieving progress in each technology stream are entirely embedded in the planning of the work packages.