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1. But they're a special kind of rotorcraft.

2. This paper is a review of rotorcraft CFD in light of major unsolved problems, and some prospects and solution philosophy for solving them.

3. Additionally, Boeing designs and manufactures rotorcraft, electronic and defense systems, missiles, satellites, launch vehicles and advanced information and communication systems.

4. operates about 5, 800 helicopters. New rotorcraft purchases are not part of this effort, Gates aides say.

5. A hybrid modeling method of a subminiature rotorcraft in horizontal turning had been proposed by using mechanism model and NN-compensation.

6. First, damage models of rotorcraft composite dynamic components is analysed and the fault tree is obtained.

7. AUTOGYRO : A rotorcraft the wings of which are not provided with any form of direct power drive.

8. Its applications include fast-jet, rotorcraft and ground-based training, as well as visualizations for presentations[sentencedict.com/rotorcraft.html], virtual prototyping and analysis.

9. Boeing will be involved in the program through Boeing Rotorcraft Systems.

10. The key technique of the project of the high-speed rotorcraft is the shift smoothness of lift and power.

11. Sea trials of the demonstrator are planned for 2012 using a French Navy frigate and a Boeing, H-6U Unmanned Little Bird rotorcraft.

12. Company provides market research and intelligence and strategic guidance for clients with current or prospective business in the rotorcraft industry.

13. Aero-acoustics simulations are increasingly being performed to reduce environmental noise generated by rotorcraft and fixed wing aircraft in high-lift configurations.

14. Further simplification of the control design process could be realized by dividing the rotorcraft dynamics into translational dynamics and attitude dynamics by using singular perturbation theory.

15. A blade, essentially made of composite material, for a rotorcraft rotor(sentencedict.com), comprising.

16. If selected, Boeing will build the Apache helicopters at its rotorcraft facility in Mesa, Ariz., and the Chinook helicopters at its rotorcraft center in Ridley Park, Pa.

17. A model for the nonlinear dynamics of a subminiature rotorcraft is established.

18. Ordinarily, it is improved by flight control system, such like rotorcraft unmanned aerial vehicles which use Bell bar or Bell-Hiller stabilizer bar.

19. The V-22 was developed by Bell Helicopter, which manufactures it in partnership with Boeing Rotorcraft Systems.

20. Designers have built so much protection and redundancy into the V-22 that it is probably the safest rotorcraft ever constructed.

21. Research on bionics and aerodynamics indicates that flapping mode is better than rotorcraft and fixed-wing mode when they are about the size of small birds.