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Impact of Ice Formations on Flight Safety


Development of Methods for Calculating Shapes of Ice Formations and their Impact on Aerodynamic Characteristics, Stability, Control and Flight Safety of Civil Aircraft

Tech Area / Field

  • SAT-AER/Aeronautics/Space, Aircraft and Surface Transportation

3 Approved without Funding

Registration date

Leading Institute
Central Aerodynamic Institute, Russia, Moscow reg., Zhukovsky

Supporting institutes

  • Gromov Flight Research Institute, Russia, Moscow reg., Zhukovsky


  • NASA / Glenn Research Center, USA, OH, Cleveland\nAIRBUS Industrie, France, Blagnac\n3M Company, USA, MN, St Paul

Project summary

Investigation of the influence of icing on aerodynamic characteristics of civil aircraft flying under adverse meteorological conditions is an important problem associated with flight safety and regularity. Ensuring flight safety of civil aircraft in icing conditions together with maintaining their high operational effectiveness require a search for a compromise between means for protection of lifting surfaces against icing and control automation and flight envelope protection. Solving this problem requires performing a wide variety of scientific research activities whose results would allow one at early stages of aircraft development:
- to predict the shape and size of ice forming on aircraft lifting surfaces in possible icing conditions;
- to calculate aerodynamic characteristics of aircraft with ice forming on its lifting surfaces in possible operational flight regimes;
- to determine the sufficiency of flight control automation to meet the current stability and control standards.

This problem can be solved at TsAGI and FRI having highly skilled specialists in the fields of aerodynamics, flight dynamics, control systems and processes of ice accretion. The specialists being recruited to perform this task have experience gained during the development programs of Russian aircraft Tu-160, Tu-95, 11-76, 11-96-300, An-124 and other military and civil aircraft. As a result of the work under the Project, methodologies can be created that allow one:

- to calculate the shape and size of ice forming on straight and swept wings;
- to determine aerodynamic characteristics of aircraft in various flight regimes under icing conditions;
- to provide recommendations for a rational choice of an anti-icing system and its parameters at the preliminary stage of aircraft design basing on calculations of the aerodynamics of iced lifting surfaces;
- to develop a combined approach for ensuring flight safety in icing conditions using a rational compromise between control automation and the protection of lifting surfaces against icing.

The selection of a rational ice protection will yield decreased aircraft weight as well as decreased operational, energy and capital costs while maintaining a sufficient flight safety level in icing conditions.

A potential role of foreign collaborators:

- a non-financial participation of foreign organizations is envisioned in the form of information exchange and discussions of results.

FAA specialists are interested in the Project's results and have requested this Project to be sent them for examination.

Among these specialists:

Richard K. Jeck, Ph.D.
Flight Safety Research Branch.
FAA Technical Center, ACD-230
Atlantic City International Airport,
New Jersey 08405.
Voice: 609-485-4462
Fax: 609-485-4005.


The International Science and Technology Center (ISTC) is an intergovernmental organization connecting scientists from Kazakhstan, Armenia, Tajikistan, Kyrgyzstan, and Georgia with their peers and research organizations in the EU, Japan, Republic of Korea, Norway and the United States.


ISTC facilitates international science projects and assists the global scientific and business community to source and engage with CIS and Georgian institutes that develop or possess an excellence of scientific know-how.

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